1
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Lee KW, Yi J, Kim MK, Kim DR. Transparent radiative cooling cover window for flexible and foldable electronic displays. Nat Commun 2024; 15:4443. [PMID: 38789512 PMCID: PMC11126687 DOI: 10.1038/s41467-024-48840-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Accepted: 05/14/2024] [Indexed: 05/26/2024] Open
Abstract
Transparent radiative cooling holds the promise to efficiently manage thermal conditions in various electronic devices without additional energy consumption. Radiative cooling cover windows designed for foldable and flexible displays could enhance cooling capacities in the ubiquitous deployment of flexible electronics in outdoor environments. However, previous demonstrations have not met the optical, mechanical, and moisture-impermeable criteria for such cover windows. Herein, we report transparent radiative cooling metamaterials with a thickness of 50 microns as a cover window of foldable and flexible displays by rational design and synthesis of embedding optically-modulating microstructures in clear polyimide. The resulting outcome not only includes excellent light emission in the atmospheric window under the secured optical transparency but also provides enhanced mechanical and moisture-impermeable properties to surpass the demands of target applications. Our metamaterials not only substantially mitigate the temperature rise in heat-generating devices exposed to solar irradiance but also enhance the thermal management of devices in dark conditions. The light output performance of light-emitting diodes in displays on which the metamaterials are deployed is greatly enhanced by suppressing the performance deterioration associated with thermalization.
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Affiliation(s)
- Kang Won Lee
- School of Mechanical Engineering, Hanyang University, Seoul, 04763, South Korea
| | - Jonghun Yi
- School of Mechanical Engineering, Hanyang University, Seoul, 04763, South Korea
| | - Min Ku Kim
- School of Mechanical Engineering, Hanyang University, Seoul, 04763, South Korea
| | - Dong Rip Kim
- School of Mechanical Engineering, Hanyang University, Seoul, 04763, South Korea.
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2
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Yao J, Wang Z, Huang Y, Xue J, Zhang D, Chen J, Chen X, Dong SC, Lu H. Efficient Green Spin Light-Emitting Diodes Enabled by Ultrafast Energy- and Spin-Funneling in Chiral Perovskites. J Am Chem Soc 2024; 146:14157-14165. [PMID: 38727602 DOI: 10.1021/jacs.4c02821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/23/2024]
Abstract
Introducing molecular chirality into perovskite crystal structures has enabled the control of carrier spin states, giving rise to circularly polarized luminescence (CPL) in thin films and circularly polarized electroluminescence (CPEL) in LEDs. Spin-LEDs can be fabricated either through a spin-filtering layer enabled by chiral-induced spin selectivity or a chiral emissive layer. The former requires a high degree of spin polarization and a compatible spinterface for efficient spin injection, which might not be easily integrated into LEDs. Alternatively, a chiral emissive layer can also generate circularly polarized electroluminescence, but the efficiency remains low and the fundamental mechanism is elusive. In this work, we report an efficient green LED based on quasi-two-dimensional (quasi-2D) chiral perovskites as the emitting layer (EML), where CPEL is directly produced without separate carrier spin injection. The optimized chiral perovskite thin films exhibited strong CPL at 535 nm with a photoluminescence quantum yield (PLQY) of 91% and a photoluminescence dissymmetry factor (glum) of 8.6 × 10-2. Efficient green spin-LEDs were successfully demonstrated, with a large EL dissymmetry factor (gEL) of 7.8 × 10-2 and a maximum external quantum efficiency (EQE) of 13.5% at room temperature. Ultrafast transient absorption (TA) spectroscopic study shows that the CPEL is generated from a rapid energy transfer accompanied by spin transfer from 2D to 3D perovskites. Our study not only demonstrates a reliable approach to achieve high performance spin-LEDs but also reveals the fundamental mechanism of CPEL with an emissive layer of chiral perovskites.
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Affiliation(s)
- Jingwen Yao
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, 999077 Hong Kong (SAR), China
- Institute for Advanced Study, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, 999077 Hong Kong (SAR), China
- State Key Laboratory of Advanced Displays and Optoelectronics Technologies, Department of Electronic and Computer Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, 999077 Hong Kong (SAR), China
| | - Zhiyu Wang
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, 999077 Hong Kong (SAR), China
| | - Yuling Huang
- Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China
| | - Jie Xue
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, 999077 Hong Kong (SAR), China
| | - Dengliang Zhang
- Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology, Guangzhou, Guangdong 510640, China
| | - Jiangshan Chen
- Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology, Guangzhou, Guangdong 510640, China
| | - Xihan Chen
- Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China
| | - Shou-Cheng Dong
- Institute for Advanced Study, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, 999077 Hong Kong (SAR), China
- State Key Laboratory of Advanced Displays and Optoelectronics Technologies, Department of Electronic and Computer Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, 999077 Hong Kong (SAR), China
| | - Haipeng Lu
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, 999077 Hong Kong (SAR), China
- Energy Institute, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, 999077 Hong Kong (SAR), China
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3
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Zhang M, Guo L, Wen J, Yang J, Liu Y, Zheng X, Zhang G, Zhu P, Xia Y, Zhang H, Chen Y. Vertically Oriented Perovskites with Minimized Intrinsic Boundaries for Efficient Photovoltaics. J Phys Chem Lett 2024:5150-5158. [PMID: 38712816 DOI: 10.1021/acs.jpclett.4c01045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/08/2024]
Abstract
Intrinsic boundaries formed by grain stacks of randomly oriented perovskite crystallites seriously restrict charge transport in the resultant photovoltaic devices, whereas direct passivation of these defects remains unexplored, and it is desirable to modulate perovskite growth with uniform orientation. Herein, we report a simple but effective method to regulate perovskite crystallization by employing a volatile and polymerizable monomer of hydroxyethyl methacrylate (HEMA), which can simultaneously interact with both FA+ and Pb2+ via hydrogen and coordination bonding, respectively, to seed perovskite crystallization with accelerated nucleation and retarded crystal growth. Upon thermal annealing, the gradual volatilization and partial self-condensation of the HEMA drive the perovskite growth perpendicularly to the substrate, leading to largely suppressed defect states, improved crystallinity, and a reduced Young's modulus of the perovskite film. As a result, champion efficiencies exceeding 24 and 22% with improved operational and mechanical stability of the optimized perovskite solar cells based on rigid and flexible substrates were finally achieved.
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Affiliation(s)
- Mengru Zhang
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), School of Flexible Electronics (Future Technologies), Nanjing Tech University, Nanjing 211816, Jiangsu, China
| | - Lijuan Guo
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), School of Flexible Electronics (Future Technologies), Nanjing Tech University, Nanjing 211816, Jiangsu, China
| | - Junlin Wen
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), School of Flexible Electronics (Future Technologies), Nanjing Tech University, Nanjing 211816, Jiangsu, China
| | - Jinxian Yang
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), School of Flexible Electronics (Future Technologies), Nanjing Tech University, Nanjing 211816, Jiangsu, China
| | - Yiming Liu
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), School of Flexible Electronics (Future Technologies), Nanjing Tech University, Nanjing 211816, Jiangsu, China
| | - Xue Zheng
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), School of Flexible Electronics (Future Technologies), Nanjing Tech University, Nanjing 211816, Jiangsu, China
| | - Guodong Zhang
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), School of Flexible Electronics (Future Technologies), Nanjing Tech University, Nanjing 211816, Jiangsu, China
| | - Peiwang Zhu
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, Zhejiang, China
| | - Yingdong Xia
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), School of Flexible Electronics (Future Technologies), Nanjing Tech University, Nanjing 211816, Jiangsu, China
| | - Hui Zhang
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), School of Flexible Electronics (Future Technologies), Nanjing Tech University, Nanjing 211816, Jiangsu, China
- State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, Zhejiang, China
| | - Yonghua Chen
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), School of Flexible Electronics (Future Technologies), Nanjing Tech University, Nanjing 211816, Jiangsu, China
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4
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Yan M, Zhou L, Wang L, Luo G, Xu L, Yang D, Fang Y. Dielectric Regulation for Efficient Top-Emission Perovskite Light-Emitting Diodes with Suppressed Efficiency Roll-off. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2309233. [PMID: 38050935 DOI: 10.1002/smll.202309233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 11/17/2023] [Indexed: 12/07/2023]
Abstract
Perovskite light-emitting diodes (PeLEDs) have shown incalculable application potential in the fields of next-generation displays and light communication owing to the rapidly increased external quantum efficiencies (EQEs). However, most PeLEDs obtain a maximum EQE at small current density (J) region and suffer from severe efficiency roll-off in different extents. Herein, it is demonstrated that the dopant with large dipole moment like KBF4 facilitates the effective dielectric regulation of perovskite emissive layer. The increased dielectric constant lowers the exciton binding energy and suppresses the Auger recombination of the 2D/3D segregated perovskite structure, which improves the photoluminescence quantum yield remarkably at an excitation intensity up to 103 mW cm-2. Accordingly, the top-emission PeLED that delivers a high maximum EQE above 20% is fabricated and can retain EQE > 10% at an extremely high J of 708 mA cm-2. These results represent one of the most efficient top-emission PeLEDs with ultra-low efficiency roll-off, which provide a viable methodology for tuning the dielectric response of perovskite films for improved high radiance performance of perovskite electroluminescence devices.
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Affiliation(s)
- Minxing Yan
- State Key Laboratory of Silicon and Advanced Semiconductor Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Lingfeng Zhou
- State Key Laboratory of Silicon and Advanced Semiconductor Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Lixiang Wang
- State Key Laboratory of Silicon and Advanced Semiconductor Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Guangjie Luo
- State Key Laboratory of Silicon and Advanced Semiconductor Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Li Xu
- State Key Laboratory of Silicon and Advanced Semiconductor Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Deren Yang
- State Key Laboratory of Silicon and Advanced Semiconductor Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Yanjun Fang
- State Key Laboratory of Silicon and Advanced Semiconductor Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
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5
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Liu H, He M, Zhang S. Energy Transfer-Dominated Quasi-2D Blue Perovskite Light-Emitting Diodes. ACS APPLIED MATERIALS & INTERFACES 2024. [PMID: 38652581 DOI: 10.1021/acsami.4c01309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/25/2024]
Abstract
The bromide-chloride mixed quasi-two-dimensional (2D) perovskite, with a natural quantum well structure and tunable exciton binding energy, has gained significant attention for high-performance blue perovskite light-emitting diodes (PeLEDs). However, the relative importance of having a low trap state density or efficient exciton transfer for high-efficiency electroluminescence (EL) performance remains elusive. Here, two molecules with the benzoic acid group, sodium 4-fluorobenzoate (SFB) and 3,5-dibromobenzoic acid (DBA), are used to modulate the phase distribution and trap state to explore the effect between energy transfer and defect passivation. As a result, when the n = 1 phase is inhibited in both films, the DBA@SFB-modified perovskite films achieve a higher photoluminescence quantum yield (PLQY) than the SFB-modified perovskite films due to effective defect passivation. However, DBA@SFB-modified PeLEDs exhibit lower external quantum efficiency (EQE) compared to SFB-modified PeLEDs due to the poor exciton transfer between the low-dimensional phase. This demonstrates that passivation strategies may enhance photoluminescence through reducing nonradiative recombination, but the effect of phase distribution is pivotal for EL performance by efficient energy transfer in quasi-2D perovskites. Femtosecond time-resolved transient absorption measurements confirm the fastest carrier dynamics in SFB-modified perovskite films, further corroborating the above result. This work provides useful information about phase modulation and defect passivation for high-efficiency blue quasi-2D PeLEDs.
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Affiliation(s)
- Hongxin Liu
- College of Physics, Sichuan University, Chengdu 610065, Sichuan, China
| | - Min He
- Chongqing Key Laboratory of Micro&Nano Structure Optoelectronics, School of Physical Science and Technology, Southwest University, Chongqing 400715, China
| | - Sijie Zhang
- College of Physics, Sichuan University, Chengdu 610065, Sichuan, China
- Guizhou University of Engineering Science, Bijie 551700, Guizhou, China
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6
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Dong W, Li H, Li J, Hua Y, Yang F, Dong Q, Zhang X, Zheng W. Precursor Engineering Induced High-Efficiency Electroluminescence of Quasi-Two-Dimensional Perovskites: A Synergistic Defect Inhibition and Passivation Approach. NANO LETTERS 2024; 24:3952-3960. [PMID: 38527956 DOI: 10.1021/acs.nanolett.4c00256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/27/2024]
Abstract
Despite light-emitting diodes (LEDs) based on quasi-two-dimensional (Q-2D) perovskites being inexpensive and exhibiting high performance, defects still limit the improvement of electroluminescence efficiency and stability by causing nonradiative recombination. Here, an organic molecule, 1-(o-tolyl) biguanide, is used to simultaneously inhibit and passivate defects of Q-2D perovskites via in situ synchronous crystallization. This molecule not only prevents surface bromine vacancies from forming through hydrogen bonding with the bromine of intermediaries but also passivates surface defects through its interaction with uncoordinated Pb. Via combination of defect inhibition and passivation, the trap density of Q-2D perovskite films can be significantly reduced, and the emission efficiency of the film can be improved. Consequently, the corresponding LED shows an external quantum efficiency of 24.3%, and its operational stability has been increased nearly 15 times.
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Affiliation(s)
- Wei Dong
- Key Laboratory of Automobile Materials MOE, School of Materials Science & Engineering, and Jilin Provincial International Cooperation Key Laboratory of High-Efficiency Clean Energy Materials, Jilin University, Changchun 130012, P. R. China
| | - Hanming Li
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, P. R. China
- School of Electronic and Computer Engineering, Peking University Shenzhen Graduate School, Shenzhen 518055, P. R. China
| | - Jing Li
- Key Laboratory of Automobile Materials MOE, School of Materials Science & Engineering, and Jilin Provincial International Cooperation Key Laboratory of High-Efficiency Clean Energy Materials, Jilin University, Changchun 130012, P. R. China
| | - Yulu Hua
- Key Laboratory of Automobile Materials MOE, School of Materials Science & Engineering, and Jilin Provincial International Cooperation Key Laboratory of High-Efficiency Clean Energy Materials, Jilin University, Changchun 130012, P. R. China
| | - Fan Yang
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Qingfeng Dong
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Xiaoyu Zhang
- Key Laboratory of Automobile Materials MOE, School of Materials Science & Engineering, and Jilin Provincial International Cooperation Key Laboratory of High-Efficiency Clean Energy Materials, Jilin University, Changchun 130012, P. R. China
| | - Weitao Zheng
- Key Laboratory of Automobile Materials MOE, School of Materials Science & Engineering, and Jilin Provincial International Cooperation Key Laboratory of High-Efficiency Clean Energy Materials, Jilin University, Changchun 130012, P. R. China
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7
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Rahimi S, Eskandari M, Fathi D. New nanostructure perovskite-based light-emitting diode with superior light extraction efficiency enhancement. Sci Rep 2024; 14:5500. [PMID: 38448629 PMCID: PMC10918065 DOI: 10.1038/s41598-024-55951-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Accepted: 02/29/2024] [Indexed: 03/08/2024] Open
Abstract
The external quantum efficiency (EQE) of a perovskite-based light-emitting diode (PELED) is a key indicator, comprising the internal quantum efficiency (IQE) and light extraction efficiency (LEE). Currently, enhancing EQE faces a major challenge in optimizing LEE. This study introduces an innovative structure to boost LEE, exploring various influencing parameters. The transition from a planar to a domical architecture leverages factors like the waveguiding effect, resulting in a remarkable tenfold increase in LEE, from 6 to 59%. Additionally, investigations into factors affecting LEE, such as altering dipole orientation, material-substrate contact angle, and layer thickness, reveal the potential for further improvement. The optimized structure attains an impressive LEE value of 74%.
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Affiliation(s)
- Saeed Rahimi
- Department of Electrical and Computer Engineering, Tarbiat Modares University (TMU), Tehran, Iran
| | - Mehdi Eskandari
- Nanomaterial Research Group, Academic Center for Education, Culture & Research (ACECR) on TMU, Tehran, Iran
| | - Davood Fathi
- Department of Electrical and Computer Engineering, Tarbiat Modares University (TMU), Tehran, Iran.
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Sun SQ, Tai JW, He W, Yu YJ, Feng ZQ, Sun Q, Tong KN, Shi K, Liu BC, Zhu M, Wei G, Fan J, Xie YM, Liao LS, Fung MK. Enhancing Light Outcoupling Efficiency via Anisotropic Low Refractive Index Electron Transporting Materials for Efficient Perovskite Light-Emitting Diodes. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024:e2400421. [PMID: 38430204 DOI: 10.1002/adma.202400421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Revised: 02/25/2024] [Indexed: 03/03/2024]
Abstract
Thanks to the extensive efforts toward optimizing perovskite crystallization properties, high-quality perovskite films with near-unity photoluminescence quantum yield are successfully achieved. However, the light outcoupling efficiency of perovskite light-emitting diodes (PeLEDs) is impeded by insufficient light extraction, which poses a challenge to the further advancement of PeLEDs. Here, an anisotropic multifunctional electron transporting material, 9,10-bis(4-(2-phenyl-1H-benzo[d]imidazole-1-yl)phenyl) anthracene (BPBiPA), with a low extraordinary refractive index (ne ) and high electron mobility is developed for fabricating high-efficiency PeLEDs. The anisotropic molecular orientations of BPBiPA can result in a low ne of 1.59 along the z-axis direction. Optical simulations show that the low ne of BPBiPA can effectively mitigate the surface plasmon polariton loss and enhance the photon extraction efficiency in waveguide mode, thereby improving the light outcoupling efficiency of PeLEDs. In addition, the high electron mobility of BPBiPA can facilitate balanced carrier injection in PeLEDs. As a result, high-efficiency green PeLEDs with a record external quantum efficiency of 32.1% and a current efficiency of 111.7 cd A-1 are obtained, which provides new inspirations for the design of electron transporting materials for high-performance PeLEDs.
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Affiliation(s)
- Shuang-Qiao Sun
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu, 215123, P. R. China
| | - Jing-Wen Tai
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu, 215123, P. R. China
| | - Wei He
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu, 215123, P. R. China
| | - You-Jun Yu
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu, 215123, P. R. China
| | - Zi-Qi Feng
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu, 215123, P. R. China
| | - Qi Sun
- Macau Institute of Materials Science and Engineering (MIMSE), MUST-SUDA Joint Research Center for Advanced Functional Materials, Zhuhai MUST Science and Technology Research Institute, Macau University of Science and Technology, Taipa, Macau, 999078, P. R. China
| | - Kai-Ning Tong
- Institute of Materials Science, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, Guangdong, 518055, P. R. China
| | - Kefei Shi
- Institute of Materials Science, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, Guangdong, 518055, P. R. China
| | - Bo-Chen Liu
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu, 215123, P. R. China
| | - Min Zhu
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu, 215123, P. R. China
| | - Guodan Wei
- Institute of Materials Science, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, Guangdong, 518055, P. R. China
| | - Jian Fan
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu, 215123, P. R. China
| | - Yue-Min Xie
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu, 215123, P. R. China
- Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou, Jiangsu, 215123, P.R. China
| | - Liang-Sheng Liao
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu, 215123, P. R. China
- Macau Institute of Materials Science and Engineering (MIMSE), MUST-SUDA Joint Research Center for Advanced Functional Materials, Zhuhai MUST Science and Technology Research Institute, Macau University of Science and Technology, Taipa, Macau, 999078, P. R. China
| | - Man-Keung Fung
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu, 215123, P. R. China
- Macau Institute of Materials Science and Engineering (MIMSE), MUST-SUDA Joint Research Center for Advanced Functional Materials, Zhuhai MUST Science and Technology Research Institute, Macau University of Science and Technology, Taipa, Macau, 999078, P. R. China
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Jiang N, Ma G, Song D, Qiao B, Liang Z, Xu Z, Wageh S, Al-Ghamdi A, Zhao S. Defects in lead halide perovskite light-emitting diodes under electric field: from behavior to passivation strategies. NANOSCALE 2024; 16:3838-3880. [PMID: 38329288 DOI: 10.1039/d3nr06547b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/09/2024]
Abstract
Lead halide perovskites (LHPs) are emerging semiconductor materials for light-emitting diodes (LEDs) owing to their unique structure and superior optoelectronic properties. However, defects that initiate degradation of LHPs through external stimuli and prompt internal ion migration at the interfaces remain a significant challenge. The electric field (EF), which is a fundamental driving force in LED operation, complicates the role of these defects in the physical and chemical properties of LHPs. A deeper understanding of EF-induced defect behavior is crucial for optimizing the LED performance. In this review, the origins and characterization of defects are explored, indicating the influence of EF-induced defect dynamics on LED performance and stability. A comprehensive overview of recent defect passivation approaches for LHP bulk films and nanocrystals (NCs) is also provided. Given the ubiquity of EF, a summary of the EF-induced defect behavior can enhance the performance of perovskite LEDs and related optoelectronic devices.
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Affiliation(s)
- Na Jiang
- Key Laboratory of Luminescence and Optical Information, Beijing Jiaotong University, Ministry of Education, Beijing, 100044, China.
- Institute of Optoelectronics Technology, Beijing Jiaotong University, Beijing, 100044, China
| | - Guoquan Ma
- Key Laboratory of Luminescence and Optical Information, Beijing Jiaotong University, Ministry of Education, Beijing, 100044, China.
- Institute of Optoelectronics Technology, Beijing Jiaotong University, Beijing, 100044, China
| | - Dandan Song
- Key Laboratory of Luminescence and Optical Information, Beijing Jiaotong University, Ministry of Education, Beijing, 100044, China.
- Institute of Optoelectronics Technology, Beijing Jiaotong University, Beijing, 100044, China
| | - Bo Qiao
- Key Laboratory of Luminescence and Optical Information, Beijing Jiaotong University, Ministry of Education, Beijing, 100044, China.
- Institute of Optoelectronics Technology, Beijing Jiaotong University, Beijing, 100044, China
| | - Zhiqin Liang
- Key Laboratory of Luminescence and Optical Information, Beijing Jiaotong University, Ministry of Education, Beijing, 100044, China.
- Institute of Optoelectronics Technology, Beijing Jiaotong University, Beijing, 100044, China
| | - Zheng Xu
- Key Laboratory of Luminescence and Optical Information, Beijing Jiaotong University, Ministry of Education, Beijing, 100044, China.
- Institute of Optoelectronics Technology, Beijing Jiaotong University, Beijing, 100044, China
| | - Swelm Wageh
- Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Ahmed Al-Ghamdi
- Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Suling Zhao
- Key Laboratory of Luminescence and Optical Information, Beijing Jiaotong University, Ministry of Education, Beijing, 100044, China.
- Institute of Optoelectronics Technology, Beijing Jiaotong University, Beijing, 100044, China
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10
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Xiao H, Li R, Cai W, Zang Z. Development of Quasi-Two-Dimensional Perovskites and Their Application in Light-Emitting Diodes. Inorg Chem 2024; 63:2853-2876. [PMID: 38299502 DOI: 10.1021/acs.inorgchem.3c03375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2024]
Abstract
Quasi-two-dimensional (quasi-2D) perovskites have attracted much attention due to their outstanding properties, such as inherent quantum-well structure, strong dielectric and quantum confinement, large exciton binding energy, and high photoluminescence quantum yield. By virtue of these superior merits, quasi-2D perovskites have shown great potential for next-generation light-emitting diodes (LEDs). Herein, this review presents an overview of the basic properties of quasi-2D perovskites and their photoluminescence modulations by large organic cation engineering, monovalent cation engineering, halogen engineering, defect passivation engineering, and dimensionality engineering. Furthermore, the strategies of charge-transport layer optimization, interfacial engineering, light-outcoupling efficiency improvement, and operating stability improvement are summarized for fabricating high-performance quasi-2D perovskite LEDs (PeLEDs). Finally, the challenges and outlook for the future development of quasi-2D PeLEDs are unambiguously proposed.
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Affiliation(s)
- Hongbin Xiao
- Key Laboratory of Optoelectronic Technology and Systems, Ministry of Education, Chongqing University, Chongqing 400044, China
- School of Optoelectronics, University of Chinese Academy of Sciences, Beijing 100049, China
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China
| | - Ru Li
- Key Laboratory of Optoelectronic Technology and Systems, Ministry of Education, Chongqing University, Chongqing 400044, China
| | - Wensi Cai
- Key Laboratory of Optoelectronic Technology and Systems, Ministry of Education, Chongqing University, Chongqing 400044, China
| | - Zhigang Zang
- Key Laboratory of Optoelectronic Technology and Systems, Ministry of Education, Chongqing University, Chongqing 400044, China
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11
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Liu H, Shi G, Khan R, Chu S, Huang Z, Shi T, Sun H, Li Y, Zhou H, Xiao P, Chen T, Xiao Z. Large-Area Flexible Perovskite Light-Emitting Diodes Enabled by Inkjet Printing. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2309921. [PMID: 38016083 DOI: 10.1002/adma.202309921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 11/14/2023] [Indexed: 11/30/2023]
Abstract
Metal halide perovskite light-emitting diodes (PeLEDs) are attracting increasing attention due to their potential applications in flat panel lighting and displays. The solution process, large-area fabrication, and flexibility are attractive properties of PeLEDs over traditional inorganic LEDs. However, it is still very challenging to deposit uniform perovskite films on flexible substrates using a blade or slot-die coating, as the flexible substrate is not perfectly flat. Here, the inkjet printing technique is adopted, and the key challenges are overcome step-by-step in preparing large-area films on flexible substrates. Double-hole transporting layers are first used and a wetting interfacial layer to improve the surface wettability so that the printed perovskite droplets can form a continuous wet film. The fluidic and evaporation dynamics of the perovskite wet layer is manipulated to suppress the coffee ring effect by solvent engineering. Uniform perovskite films are obtained finally on flexible substrates with different perovskite compositions. The peak external quantum efficiency of the inkjet-printed PeLEDs reaches 14.3%. Large-area flexible PeLEDs (4 × 7 cm2 ) also show very uniform emission. This work represents a significant step toward real applications of large-area PeLEDs in flexible flat-panel lighting.
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Affiliation(s)
- Hui Liu
- Department of Physics, CAS Key Laboratory of Strongly coupled Quantum Matter Physics, University of Science and Technology of China, Hefei, Anhui, 230026, China
- School of Microelectronics, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Guangyi Shi
- Department of Physics, CAS Key Laboratory of Strongly coupled Quantum Matter Physics, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Rashid Khan
- Department of Physics, CAS Key Laboratory of Strongly coupled Quantum Matter Physics, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Shenglong Chu
- Department of Physics, CAS Key Laboratory of Strongly coupled Quantum Matter Physics, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Zongming Huang
- Department of Physics, CAS Key Laboratory of Strongly coupled Quantum Matter Physics, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Tongfei Shi
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, Anhui, 230031, China
| | - Haiding Sun
- School of Microelectronics, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Yaping Li
- Center for Micro- and Nanoscale Research and Fabrication, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Hongmin Zhou
- Instruments Center for Physical Science, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Peng Xiao
- Department of Materials Science and Engineering, CAS Key Laboratory of Materials for Energy Conversion, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Tao Chen
- Department of Materials Science and Engineering, CAS Key Laboratory of Materials for Energy Conversion, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Zhengguo Xiao
- Department of Physics, CAS Key Laboratory of Strongly coupled Quantum Matter Physics, University of Science and Technology of China, Hefei, Anhui, 230026, China
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12
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Yang W, He X, Huang X, Wang X, Zhang Y, Gao CH. Defect Passivation in Quasi-2D Perovskite Light-Emitting Diodes by an Ibuprofen Additive. ACS APPLIED MATERIALS & INTERFACES 2024; 16:1628-1637. [PMID: 38130095 DOI: 10.1021/acsami.3c10337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2023]
Abstract
It is well known that the inferior film morphology and the excessive surface/interface defect states are two obstacles to achieving high electroluminescence performance of quasi-2D perovskite light-emitting diodes (PeLEDs). To solve these problems, ibuprofen was introduced as an additive in the quasi-2D perovskite emitting layer. More efficient photoluminescence is demonstrated. Further, optimized quasi-2D PeLEDs with a current efficiency of 55.93 cd/A are confirmed and 5.7-fold enhancement in device stability is obtained. The physical mechanism of the remarkable improvement is investigated by kinds of measurements. Three aspects should be counted into it. First, the introduction of ibuprofen can passivate defects, thus making the quasi-2D perovskite emitting layer more dense and homogeneous. The reason should be that the C═O functional group and C═C bond in the benzene ring in ibuprofen can coordinate the unsaturated Pb2+ perovskite emitting layer. Meanwhile, the related exciton harvesting process is investigated. The proportion of the crystalline phases (small n and large n phase) can be tuned to benefit the energy funneling process. Finally, the analysis of the current density and voltage curves of the hole-dominated devices and the electron-dominated devices is conducted by utilizing the space charge-limited current (SCLC) methods.
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Affiliation(s)
- Wei Yang
- School of Physical Science and Technology, MOE Key Laboratory on Luminescence and Real-Time Analysis, Southwest University, Chongqing 400715, China
| | - XiaoLi He
- School of Physical Science and Technology, MOE Key Laboratory on Luminescence and Real-Time Analysis, Southwest University, Chongqing 400715, China
| | - XinMei Huang
- School of Physical Science and Technology, MOE Key Laboratory on Luminescence and Real-Time Analysis, Southwest University, Chongqing 400715, China
| | - XiaoYu Wang
- School of Physical Science and Technology, MOE Key Laboratory on Luminescence and Real-Time Analysis, Southwest University, Chongqing 400715, China
| | - Yong Zhang
- School of Physical Science and Technology, MOE Key Laboratory on Luminescence and Real-Time Analysis, Southwest University, Chongqing 400715, China
| | - Chun-Hong Gao
- School of Physical Science and Technology, MOE Key Laboratory on Luminescence and Real-Time Analysis, Southwest University, Chongqing 400715, China
- School of Physics and Materials Science, Guangzhou University, Guangzhou 510006, China
- Research Center for Advanced Information Materials (CAIM), Huangpu Research and Graduated School of Guangzhou University, Guangzhou 510006, China
- Department of Education of Guangzhou Province, Key Lab of Si-Based Information Materials & Devices and Integrated Circuits Design, Guangzhou 510006, China
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13
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Wang H, Yin Y, Xu J, Li J, Bao Y, An M, Tang L, Jin S, Tian W, Yang Y. Field-Induced Transport Anisotropy in Single-Crystalline All-Inorganic Lead-Halide Perovskite Nanowires. ACS NANO 2023. [PMID: 37975813 DOI: 10.1021/acsnano.3c06944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2023]
Abstract
The dynamic crystal lattice of halide perovskites facilitates the coupled transport of ions and electrons, offering innovative concepts in semiconductor iontronic devices that surpass solar cell applications. However, a comprehensive understanding of the intricacies of coupled ionic and electronic transport at the microscale remains ambiguous, owing to the inhomogeneity in ploy-crystalline perovskite thin films. In this work, we employed one-dimensional (1D) single-crystalline CsPbBr3 nanowires (NWs) to investigate the electric field induced ionic transport. Upon poling by an external bias, the previously uniform NW exhibits highly anisotropic ionic transport, which is identified as the origin of the giant switchable photovoltaic effect by spatially resolved scanning photocurrent microscopy. The subsequent ultrafast scanning photoluminescence (PL) microscopy measurements demonstrate significant localization of photocarriers near one terminal of the device, which is attributed to the accumulation of halogen vacancies. In addition, thanks to the enhancement of the local electric field, the poled device shows a 10-fold increase of photoresponse speed. Our findings favor the scale-down of perovskite devices to the submicrometer scale, extending their applications in self-powered iontronic and optoelectronic devices.
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Affiliation(s)
- Hengshan Wang
- School of Integrated Circuits, Dalian University of Technology, No. 321 Tuqiang Road, Dalian 116620, China
| | - Yanfeng Yin
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Jiao Xu
- School of Integrated Circuits, Dalian University of Technology, No. 321 Tuqiang Road, Dalian 116620, China
| | - Jing Li
- School of Integrated Circuits, Dalian University of Technology, No. 321 Tuqiang Road, Dalian 116620, China
- Key Laboratory of Materials Modification by Laser, Ion, and Electron Beams (Ministry of Education), School of Physics, Dalian University of Technology, No.2 Linggong Road, Dalian 116024, China
| | - Yanan Bao
- School of Integrated Circuits, Dalian University of Technology, No. 321 Tuqiang Road, Dalian 116620, China
| | - Meiqi An
- School of Integrated Circuits, Dalian University of Technology, No. 321 Tuqiang Road, Dalian 116620, China
| | - Lingzhi Tang
- School of Integrated Circuits, Dalian University of Technology, No. 321 Tuqiang Road, Dalian 116620, China
| | - Shengye Jin
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Wenming Tian
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Yiming Yang
- School of Integrated Circuits, Dalian University of Technology, No. 321 Tuqiang Road, Dalian 116620, China
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14
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Hu Y, Song L, Tan C, Yang F, Wen Y, Wang L, Li H, Li X, Ma F, Lu S. Efficient sky-blue cesium lead bromide light-emitting diodes with enhanced stability via synergistic interfacial induction and polymer scaffold inhibition. J Colloid Interface Sci 2023; 650:330-338. [PMID: 37413867 DOI: 10.1016/j.jcis.2023.06.156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 06/21/2023] [Accepted: 06/23/2023] [Indexed: 07/08/2023]
Abstract
All inorganic CsPbX3 perovskite has aroused broad interests in building efficient light-emitting devices with wide color gamut and flexible fabrication process. So far, the realization of high-performance blue perovskite light-emitting devices (PeLEDs) is still a critical challenge. Herein, we propose an interfacial induction strategy to generate low-dimensional CsPbBr3 with sky blue emission by employing γ-aminobutyric acid (GABA) modified poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS). The interaction between GABA and Pb2+ inhibited the formation of bulk CsPbBr3 phase. Further assisted by the polymer networks, the sky-blue CsPbBr3 film exhibited much improved stability under both photoluminescence and electrical excitation. This can be ascribed to the scaffold effect and the passivation function of the polymer. Consequently, the obtained sky-blue PeLEDs exhibited an average external quantum efficiency (EQE) of 5.67% (maximum of 7.21%) with a maximum brightness of 3308 cd/m2 and a working lifespan reaching 0.41 h. The strategy in this work provides a new opportunity for exploitation the full potential of blue PeLEDs towards application in lighting and display devices.
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Affiliation(s)
- Yongsheng Hu
- School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450001, China
| | - Li Song
- State Key Laboratory of Reliability and Intelligence of Electrical Equipment and Tianjin Key Laboratory of Electronic Materials and Devices, School of Electronics and Information Engineering, Hebei University of Technology, Tianjin 300401, China.
| | - Chang Tan
- State Key Laboratory of Reliability and Intelligence of Electrical Equipment and Tianjin Key Laboratory of Electronic Materials and Devices, School of Electronics and Information Engineering, Hebei University of Technology, Tianjin 300401, China
| | - Fan Yang
- State Key Laboratory of Reliability and Intelligence of Electrical Equipment and Tianjin Key Laboratory of Electronic Materials and Devices, School of Electronics and Information Engineering, Hebei University of Technology, Tianjin 300401, China
| | - Yu Wen
- State Key Laboratory of Reliability and Intelligence of Electrical Equipment and Tianjin Key Laboratory of Electronic Materials and Devices, School of Electronics and Information Engineering, Hebei University of Technology, Tianjin 300401, China
| | - Lishuang Wang
- State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, School of Resources, Environment and Materials, Guangxi University, Nanning, Guangxi 530004, China
| | - Haixia Li
- School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450001, China
| | - Xin Li
- School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450001, China
| | - Fengying Ma
- School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450001, China
| | - Siyu Lu
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
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15
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Wang H, Bao Y, Li J, Li D, An M, Tang L, Li J, Tang H, Chi Y, Xu J, Yang Y. Highly Anisotropic Polarization Induced by Electrical Poling in Single-Crystalline All-Inorganic Perovskite Nanoplates. J Phys Chem Lett 2023; 14:9943-9950. [PMID: 37903345 DOI: 10.1021/acs.jpclett.3c02394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2023]
Abstract
The coupled ionic and electronic transport in halide perovskites opens up new possibilities for semiconductor iontronic devices beyond solar cells. Nevertheless, the fundamental understanding of ionic behavior at the microscale remains vague, largely because of the inhomogeneity in polycrystalline thin films. Here, we show that the ion dynamics in single-crystalline perovskite nanoplates (NPs) are significantly different and that an external bias may induce highly anisotropic ionic transport in the NPs, thereby leading to a greatly enhanced local electric field. Using modified scanning photocurrent microscopy (SPCM), the origin of the photocurrent is pinpointed to the cathode region of the NP device, where subsequent energy dispersive spectroscopy (EDS) characterization confirms a large accumulation of halogen vacancies. In addition, the Kelvin probe force microscopy (KPFM) measurement demonstrates a strong built-in electric field within a submicron length near the cathode, which alters the local electronic structure for efficient photo carrier separation. Such field-induced ionic behavior deepens the understanding of ion dynamics in perovskites and promotes scale-down of perovskite micro- and nanoiontronic and ion-optoelectronic devices.
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Affiliation(s)
- Hengshan Wang
- School of Microelectronics, Dalian University of Technology, No. 321 Tuqiang Road, Dalian 116620, China
| | - Yanan Bao
- School of Microelectronics, Dalian University of Technology, No. 321 Tuqiang Road, Dalian 116620, China
| | - Jing Li
- School of Microelectronics, Dalian University of Technology, No. 321 Tuqiang Road, Dalian 116620, China
- Key Laboratory of Materials Modification by Laser, Ion, and Electron Beams (Ministry of Education), School of Physics, Dalian University of Technology, No. 2 Linggong Road, Dalian 116024, China
| | - Dongwen Li
- Jilin Provincial Key Laboratory of Architectural Electricity & Comprehensive Energy Saving, School of Electrical Engineering and Computer, Jilin Jianzhu University, Changchun 130118, China
| | - Meiqi An
- School of Microelectronics, Dalian University of Technology, No. 321 Tuqiang Road, Dalian 116620, China
| | - Lingzhi Tang
- School of Microelectronics, Dalian University of Technology, No. 321 Tuqiang Road, Dalian 116620, China
| | - Jianliang Li
- School of Microelectronics, Dalian University of Technology, No. 321 Tuqiang Road, Dalian 116620, China
| | - Huayi Tang
- School of Microelectronics, Dalian University of Technology, No. 321 Tuqiang Road, Dalian 116620, China
| | - Yaodan Chi
- Jilin Provincial Key Laboratory of Architectural Electricity & Comprehensive Energy Saving, School of Electrical Engineering and Computer, Jilin Jianzhu University, Changchun 130118, China
| | - Jiao Xu
- School of Microelectronics, Dalian University of Technology, No. 321 Tuqiang Road, Dalian 116620, China
| | - Yiming Yang
- School of Microelectronics, Dalian University of Technology, No. 321 Tuqiang Road, Dalian 116620, China
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16
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Zeng X, Yan C, Wang Q, Cao J, Fu X, Yang S, Chen Y, Pan L, Li W, Yang W. High Curvature PEDOT:PSS Transport Layer Toward Enhanced Perovskite Light-Emitting Diodes. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2304411. [PMID: 37491785 DOI: 10.1002/smll.202304411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 07/16/2023] [Indexed: 07/27/2023]
Abstract
The rapidly developed metal halide perovskite light-emitting diodes (PeLEDs) are considered as a promising candidate for next-generation display and illumination, but the unbalanced charge transport is still a hard-treat case to restrict its efficiency and operational stability. Here, a high curvature PEDOT:PSS transport layer is demonstrated via the self-assembly island-like structures by the incorporation of alkali metal salts. Benefiting from the dielectric confinement effect of the high curvature surface, the modified CsPbBr3 -based PeLEDs present a 2.1 times peak external quantum efficiency (EQE) from 6.75% to 14.23% and a 3.3 times half lifetime (T50 ) from 3.96 to 13.01 h. Besides, the PeLEDs show high luminance up to 44834 cd m-2 . Evidently, this work may provide a deep insight into the structure-activity relationship between the micro-structures at the PEDOT:PSS/perovskite interface and the performance of PeLEDs, and crack the codes for ameliorating the performance of PeLEDs via interfacial micro-structured regulation.
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Affiliation(s)
- Xiankan Zeng
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, P. R. China
| | - Cheng Yan
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, P. R. China
| | - Qungui Wang
- College of Physics, Sichuan University, Chengdu, 610065, P. R. China
| | - Jingjing Cao
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, P. R. China
| | - Xuehai Fu
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, P. R. China
| | - Shiyu Yang
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, P. R. China
| | - Yongjian Chen
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, P. R. China
| | - Lunyao Pan
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, P. R. China
| | - Wen Li
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, P. R. China
| | - Weiqing Yang
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, P. R. China
- Research Institute of Frontier Science, Southwest Jiaotong University, Chengdu, 610031, P. R. China
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17
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Qin F, Lu M, Lu P, Sun S, Bai X, Zhang Y. Luminescence and Degeneration Mechanism of Perovskite Light-Emitting Diodes and Strategies for Improving Device Performance. SMALL METHODS 2023; 7:e2300434. [PMID: 37434048 DOI: 10.1002/smtd.202300434] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Revised: 06/17/2023] [Indexed: 07/13/2023]
Abstract
Perovskite light-emitting diodes (PeLEDs) can be a promising technology for next-generation display and lighting applications due to their excellent optoelectronic properties. However, a systematical overview of luminescence and degradation mechanism of perovskite materials and PeLEDs is lacking. Therefore, it is crucial to fully understand these mechanisms and further improve device performances. In this work, the fundamental photophysical processes of perovskite materials, electroluminescence mechanism of PeLEDs including carrier kinetics and efficiency roll-off as well as device degradation mechanism are discussed in detail. In addition, the strategies to improve device performances are summarized, including optimization of photoluminescence quantum yield, charge injection and recombination, and light outcoupling efficiency. It is hoped that this work can provide guidance for future development of PeLEDs and ultimately realize industrial applications.
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Affiliation(s)
- Feisong Qin
- State Key Laboratory of Integrated Optoelectronics and College of Electronic Science and Engineering, Jilin University, Changchun, 130012, China
| | - Min Lu
- State Key Laboratory of Integrated Optoelectronics and College of Electronic Science and Engineering, Jilin University, Changchun, 130012, China
| | - Po Lu
- State Key Laboratory of Integrated Optoelectronics and College of Electronic Science and Engineering, Jilin University, Changchun, 130012, China
| | - Siqi Sun
- State Key Laboratory of Integrated Optoelectronics and College of Electronic Science and Engineering, Jilin University, Changchun, 130012, China
| | - Xue Bai
- State Key Laboratory of Integrated Optoelectronics and College of Electronic Science and Engineering, Jilin University, Changchun, 130012, China
| | - Yu Zhang
- State Key Laboratory of Integrated Optoelectronics and College of Electronic Science and Engineering, Jilin University, Changchun, 130012, China
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18
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Lin Y, Chen C, Wang Y, Yu M, Yang J, Ni I, Lin B, Zhidkov IS, Kurmaev EZ, Lu Y, Chueh C. Realizing High Brightness Quasi-2D Perovskite Light-Emitting Diodes with Reduced Efficiency Roll-Off via Multifunctional Interface Engineering. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2302232. [PMID: 37400366 PMCID: PMC10502845 DOI: 10.1002/advs.202302232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Revised: 06/21/2023] [Indexed: 07/05/2023]
Abstract
Quasi-2D perovskites have recently flourished in the field of luminescence due to the quantum-confinement effect and the efficient energy transfer between different n phases resulting in exceptional optical properties. However, owing to the lower conductivity and poor charge injection, quasi-2D perovskite light-emitting diodes (PeLEDs) typically suffer from low brightness and high-efficiency roll-off at high current densities compared to 3D perovskite-based PeLEDs, which is undoubtedly one of the most critical issues in this field. In this work, quasi-2D PeLEDs with high brightness, reduced trap density, and low-efficiency roll-off are successfully demonstrated by introducing a thin layer of conductive phosphine oxide at the perovskite/electron transport layer interface. The results surprisingly show that this additional layer does not improve the energy transfer between multiple quasi-2D phases in the perovskite film, but purely improves the electronic properties of the perovskite interface. On the one hand, it passivates the surface defects of the perovskite film; on the other hand, it promotes electron injection and prevents hole leakage across this interface. As a result, the modified quasi-2D pure Cs-based device shows a maximum brightness of > 70,000 cd m-2 (twice that of the control device), a maximum external quantum efficiency (EQE) of > 10% and a much lower efficiency roll-off at high bias voltages.
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Affiliation(s)
- Yu‐Kuan Lin
- Department of Chemical EngineeringNational Taiwan UniversityTaipei10617Taiwan
| | - Chiung‐Han Chen
- Department of Chemical EngineeringNational Taiwan UniversityTaipei10617Taiwan
| | - Yen‐Yu Wang
- Research Center for Applied SciencesAcademia SinicaTaipei11529Taiwan
| | - Ming‐Hsuan Yu
- Department of Chemical EngineeringNational Taiwan UniversityTaipei10617Taiwan
| | - Jing‐Wei Yang
- Research Center for Applied SciencesAcademia SinicaTaipei11529Taiwan
| | - I‐Chih Ni
- Graduate Institute of Photonics and OptoelectronicsNational Taiwan UniversityTaipei10617Taiwan
| | - Bi‐Hsuan Lin
- National Synchrotron Radiation Research CenterHsinchu30076Taiwan
| | - Ivan S. Zhidkov
- Institute of Physics and TechnologyUral Federal UniversityYekaterinburg620002Russia
- M. N. Mikheev Institute of Metal Physics of Ural Branch of Russian Academy of SciencesYekaterinburg620108Russia
| | - Ernst Z. Kurmaev
- Institute of Physics and TechnologyUral Federal UniversityYekaterinburg620002Russia
- M. N. Mikheev Institute of Metal Physics of Ural Branch of Russian Academy of SciencesYekaterinburg620108Russia
| | - Yu‐Jung Lu
- Research Center for Applied SciencesAcademia SinicaTaipei11529Taiwan
- Department of PhysicsNational Taiwan UniversityTaipei10617Taiwan
| | - Chu‐Chen Chueh
- Department of Chemical EngineeringNational Taiwan UniversityTaipei10617Taiwan
- Advanced Research Center for Green Materials Science and TechnologyNational Taiwan UniversityTaipei10617Taiwan
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19
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Singh A, Kim Y, Henry R, Ade H, Mitzi DB. Study of Glass Formation and Crystallization Kinetics in a 2D Metal Halide Perovskite Using Ultrafast Calorimetry. J Am Chem Soc 2023; 145:18623-18633. [PMID: 37552801 DOI: 10.1021/jacs.3c06342] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/10/2023]
Abstract
While crystalline 2D metal halide perovskites (MHPs) represent a well-celebrated semiconductor class, supporting applications in the fields of photovoltaics, emitters, and sensors, the recent discovery of glass formation in an MHP opens many new opportunities associated with reversible glass-crystalline switching, with each state offering distinct optoelectronic properties. However, the previously reported [S-(-)-1-(1-naphthyl)ethylammonium]2PbBr4 perovskite is a strong glass former with sluggish glass-crystal transformation time scales, pointing to a need for glassy MHPs with a broader range of compositions and crystallization kinetics. Herein we report glass formation for low-melting-temperature 1-MeHa2PbI4 (1-MeHa = 1-methyl-hexylammonium) using ultrafast calorimetry, thereby extending the range of MHP glass formation across a broader range of organic (fused ring to branched aliphatic) and halide (bromide to iodide) compositions. The importance of a slight loss of organic and hydrogen iodide components from the MHP in stabilizing the glassy state is elucidated. Furthermore, the underlying kinetics of glass-crystal transformation, including activation energies, crystal growth rate, Angell plot, and fragility index, is studied using a combination of kinetic, thermodynamic, and rheological modeling techniques. An inferred fast crystal growth rate of 0.21 m/s for 1-MeHa2PbI4 shows promise toward suitability in extended application spaces, for example, in metamaterials, nonvolatile memory, and optical and neuromorphic computing devices.
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Affiliation(s)
- Akash Singh
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina 27708, United States
- University Program in Materials Science and Engineering, Duke University, Durham, North Carolina 27708, United States
| | - Yongshin Kim
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina 27708, United States
- University Program in Materials Science and Engineering, Duke University, Durham, North Carolina 27708, United States
| | - Reece Henry
- Organic and Carbon Electronics Laboratory (ORaCEL), Department of Physics, North Carolina State University, Raleigh, North Carolina 27695, United States
| | - Harald Ade
- Organic and Carbon Electronics Laboratory (ORaCEL), Department of Physics, North Carolina State University, Raleigh, North Carolina 27695, United States
| | - David B Mitzi
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina 27708, United States
- Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
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20
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Cao YB, Zhang D, Zhang Q, Qiu X, Zhou Y, Poddar S, Fu Y, Zhu Y, Liao JF, Shu L, Ren B, Ding Y, Han B, He Z, Kuang DB, Wang K, Zeng H, Fan Z. High-efficiency, flexible and large-area red/green/blue all-inorganic metal halide perovskite quantum wires-based light-emitting diodes. Nat Commun 2023; 14:4611. [PMID: 37528109 PMCID: PMC10393990 DOI: 10.1038/s41467-023-40150-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2023] [Accepted: 07/13/2023] [Indexed: 08/03/2023] Open
Abstract
Metal halide perovskites have shown great promise as a potential candidate for next-generation solid state lighting and display technologies. However, a generic organic ligand-free and antisolvent-free solution method to fabricate highly efficient full-color perovskite light-emitting diodes has not been realized. Herein, by utilizing porous alumina membranes with ultra-small pore size as templates, we have successfully fabricated crystalline all-inorganic perovskite quantum wire arrays with ultrahigh density and excellent uniformity, using a generic organic ligand-free and anti-solvent-free solution method. The quantum confinement effect, in conjunction with the high light out-coupling efficiency, results in high photoluminescence quantum yield for blue, sky-blue, green and pure-red perovskite quantum wires arrays. Consequently, blue, sky-blue, green and pure-red LED devices with spectrally stable electroluminescence have been successfully fabricated, demonstrating external quantum efficiencies of 12.41%, 16.49%, 26.09% and 9.97%, respectively, after introducing a dual-functional small molecule, which serves as surface passivation and hole transporting layer, and a halide vacancy healing agent.
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Affiliation(s)
- Yang Bryan Cao
- Department of Electronic & Computer Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
- State Key Laboratory of Advanced Display and Optoelectronics Technologies HKUST, Clear Water Bay, Kowloon, Hong Kong SAR, China
- Guangdong-Hong Kong-Macau Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology, HKUST, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Daquan Zhang
- Department of Electronic & Computer Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
- State Key Laboratory of Advanced Display and Optoelectronics Technologies HKUST, Clear Water Bay, Kowloon, Hong Kong SAR, China
- Guangdong-Hong Kong-Macau Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology, HKUST, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Qianpeng Zhang
- Department of Electronic & Computer Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
- State Key Laboratory of Advanced Display and Optoelectronics Technologies HKUST, Clear Water Bay, Kowloon, Hong Kong SAR, China
- Guangdong-Hong Kong-Macau Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology, HKUST, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Xiao Qiu
- Department of Electronic & Computer Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
- State Key Laboratory of Advanced Display and Optoelectronics Technologies HKUST, Clear Water Bay, Kowloon, Hong Kong SAR, China
- Guangdong-Hong Kong-Macau Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology, HKUST, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Yu Zhou
- Department of Electronic & Computer Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
- State Key Laboratory of Advanced Display and Optoelectronics Technologies HKUST, Clear Water Bay, Kowloon, Hong Kong SAR, China
- Guangdong-Hong Kong-Macau Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology, HKUST, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Swapnadeep Poddar
- Department of Electronic & Computer Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
- State Key Laboratory of Advanced Display and Optoelectronics Technologies HKUST, Clear Water Bay, Kowloon, Hong Kong SAR, China
- Guangdong-Hong Kong-Macau Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology, HKUST, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Yu Fu
- Department of Electronic & Computer Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
- State Key Laboratory of Advanced Display and Optoelectronics Technologies HKUST, Clear Water Bay, Kowloon, Hong Kong SAR, China
- Guangdong-Hong Kong-Macau Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology, HKUST, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Yudong Zhu
- Department of Electronic & Computer Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
- Department of Materials Science and Engineering, Southern University of Science and Technology, No. 1088, Xueyuan Rd., Shenzhen, 518055, Guangdong, China
| | - Jin-Feng Liao
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, China
| | - Lei Shu
- Department of Electronic & Computer Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
- State Key Laboratory of Advanced Display and Optoelectronics Technologies HKUST, Clear Water Bay, Kowloon, Hong Kong SAR, China
- Guangdong-Hong Kong-Macau Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology, HKUST, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Beitao Ren
- Department of Electronic & Computer Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
- State Key Laboratory of Advanced Display and Optoelectronics Technologies HKUST, Clear Water Bay, Kowloon, Hong Kong SAR, China
- Guangdong-Hong Kong-Macau Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology, HKUST, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Yucheng Ding
- Department of Electronic & Computer Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
- State Key Laboratory of Advanced Display and Optoelectronics Technologies HKUST, Clear Water Bay, Kowloon, Hong Kong SAR, China
- Guangdong-Hong Kong-Macau Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology, HKUST, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Bing Han
- Department of Materials Science and Engineering, Southern University of Science and Technology, No. 1088, Xueyuan Rd., Shenzhen, 518055, Guangdong, China
| | - Zhubing He
- Department of Materials Science and Engineering, Southern University of Science and Technology, No. 1088, Xueyuan Rd., Shenzhen, 518055, Guangdong, China
| | - Dai-Bin Kuang
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, China
| | - Kefan Wang
- Henan Provinces Key Laboratory of Photovoltaic Materials, Henan University, Kaifeng, 475004, Henan, China
| | - Haibo Zeng
- MIIT Key Laboratory of Advanced Display Materials and Devices, Institute of Optoelectronics & Nanomaterials, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China.
| | - Zhiyong Fan
- Department of Electronic & Computer Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China.
- State Key Laboratory of Advanced Display and Optoelectronics Technologies HKUST, Clear Water Bay, Kowloon, Hong Kong SAR, China.
- Guangdong-Hong Kong-Macau Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology, HKUST, Clear Water Bay, Kowloon, Hong Kong SAR, China.
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21
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Li W, Li T, Tong Y, Qi H, Zhang Y, Guo Y, Wang H, Wang H, Wang K, Wang H. Fabrication of Highly Luminescent Quasi Two-Dimensional CsPbBr 3 Perovskite Films in High Humidity Air for Light-Emitting Diodes. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 37467461 DOI: 10.1021/acsami.3c07140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/21/2023]
Abstract
Perovskite light-emitting diodes (LEDs) have attracted extensive attention in recent years due to their outstanding performance and promise in lighting and display applications. However, the fabrication of perovskite LEDs usually requires a low-humidity atmosphere, which is unfavorable for industrial production. Herein, we report an effective strategy to fabricate highly luminescent quasi two-dimensional CsPbBr3 perovskite films in an ambient atmosphere with a humidity up to 60%. We reveal that the hole transport layer (HTL) plays a significant role in the morphology and optical properties of the perovskite films. Using hydrophobic self-assembled monolayer materials as HTLs can remarkably improve the quality of the perovskite films processed in high humidity air. The resultant perovskite LEDs show reduced leakage current and significantly enhanced performance. Furthermore, surface treatment is conducted to prevent water invasion and promote radiative recombination in perovskite films and LEDs. Eventually, the perovskite LEDs exhibit bright green emission with an external quantum efficiency of 4.87%. The present work provides a feasible pathway to overcome the humidity limitation for obtaining bright perovskite films and LEDs, which would contribute to further reducing the fabrication cost of perovskite LEDs and promoting their applications.
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Affiliation(s)
- Wan Li
- State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene (NPU), Xi'an 710072, China
| | - Tianxiang Li
- State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene (NPU), Xi'an 710072, China
| | - Yu Tong
- State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene (NPU), Xi'an 710072, China
| | - Heng Qi
- State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene (NPU), Xi'an 710072, China
| | - Youqian Zhang
- State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene (NPU), Xi'an 710072, China
| | - Yangyang Guo
- State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene (NPU), Xi'an 710072, China
| | - Hao Wang
- State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene (NPU), Xi'an 710072, China
| | - Hongyue Wang
- State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene (NPU), Xi'an 710072, China
| | - Kun Wang
- School of Microelectronics, Northwestern Polytechnical University, Xi'an 710072, China
- Shenzhen Research Institute of Northwestern Polytechnical University, Shenzhen 518057, China
| | - Hongqiang Wang
- State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene (NPU), Xi'an 710072, China
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22
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Zeng M, Chen D, Wang J, Li D, Xie G, Ou J, Wang L, Wang J. Deep-Blue Perovskite Light-Emitting Diodes Realized by a Dynamic Interfacial Ion Exchange. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 37467393 DOI: 10.1021/acsami.3c05253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/21/2023]
Abstract
The external quantum efficiency (EQE) of the sky-blue perovskite light-emitting diodes (PeLEDs) has reached 18.65%. However, the EQE of the deep-blue PeLEDs is still inferior to that of sky-blue PeLEDs, which restricts the PeLED application in displays. Herein, a novel dynamic interfacial ion-exchange technique is developed to obtain deep-blue PeLEDs. By spin-coating quaternary ammonium chloride on top of a quasi-2D green perovskite film, a 68 nm spectral transition from green light emission at 513 nm to deep-blue light emission at 445 nm has been successfully realized. To the best of our knowledge, it is the largest spectrum transition ever achieved. By further introducing tricyclohexylphosphine oxide into the perovskite precursor solution to passivate defects, high-quality deep-blue PeLEDs have been fabricated with color coordinates at (0.13, 0.06). The maximum EQE reaches 1.8%, and the peak luminance reaches 847 cd/m2.
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Affiliation(s)
- Muxue Zeng
- Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China
| | - Dan Chen
- Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China
| | - Junjie Wang
- Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China
| | - Danyang Li
- Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China
| | - Guangyao Xie
- Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China
| | - Jiaqi Ou
- Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China
| | - Lei Wang
- Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China
| | - Jian Wang
- Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China
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23
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Wani T, Shamsi J, Bai X, Arora N, Dar MI. Advances in All-Inorganic Perovskite Nanocrystal-Based White Light Emitting Devices. ACS OMEGA 2023; 8:17337-17349. [PMID: 37251151 PMCID: PMC10210016 DOI: 10.1021/acsomega.3c00188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Accepted: 04/25/2023] [Indexed: 05/31/2023]
Abstract
Metal halide perovskites (MHPs) are exceptional semiconductors best known for their intriguing properties, such as high absorption coefficients, tunable bandgaps, excellent charge transport, and high luminescence yields. Among various MHPs, all-inorganic perovskites exhibit benefits over hybrid compositions. Notably, critical properties, including chemical and structural stability, could be improved by employing organic-cation-free MHPs in optoelectronic devices such as solar cells and light-emitting devices (LEDs). Due to their enticing features, including spectral tunability over the entire visible spectrum with high color purity, all-inorganic perovskites have become a focus of intense research for LEDs. This Review explores and discusses the application of all-inorganic CsPbX3 nanocrystals (NCs) in developing blue and white LEDs. We discuss the challenges perovskite-based LEDs (PLEDs) face and the potential strategies adopted to establish state-of-the-art synthetic routes to obtain rational control over dimensions and shape symmetry without compromising the optoelectronic properties. Finally, we emphasize the significance of matching the driving currents of different LED chips and balancing the aging and temperature of individual chips to realize efficient, uniform, and stable white electroluminescence.
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Affiliation(s)
- Tajamul
A. Wani
- Department
of Materials Science and Engineering, Indian Institute of Technology Delhi, New Delhi 110016, India
| | - Javad Shamsi
- Cavendish
Laboratory, Department of Physics, University
of Cambridge, Cambridge CB3 0HE, United
Kingdom
| | - Xinyu Bai
- Cavendish
Laboratory, Department of Physics, University
of Cambridge, Cambridge CB3 0HE, United
Kingdom
| | - Neha Arora
- Cavendish
Laboratory, Department of Physics, University
of Cambridge, Cambridge CB3 0HE, United
Kingdom
- Department
of Chemistry, University College London, London WC1H 0AJ, United Kingdom
| | - M. Ibrahim Dar
- Cavendish
Laboratory, Department of Physics, University
of Cambridge, Cambridge CB3 0HE, United
Kingdom
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24
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Liu L, Piao J, Wang Y, Liu C, Chen J, Cao K, Chen S. Trifunctional Trichloroacetic Acid Incorporated Mixed-Halide Perovskites for Spectrally Stable Blue Light-Emitting Diodes. J Phys Chem Lett 2023; 14:4734-4741. [PMID: 37184086 DOI: 10.1021/acs.jpclett.3c01028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Metal halide perovskites have won great recognition in light-emitting diodes (LEDs). Nevertheless, the development of blue perovskite LEDs is facing a bottleneck in improving the device performance. Although mixed chloride/bromide perovskites can achieve pure-blue emission straightforwardly, higher chloride content will induce the challenges of low photoluminescence quantum yield and poor spectra stability resulting from the chloride vacancy defects and resultant halide ion migration under an electric field. In this work, we introduce a reliable trifunctional additive trichloroacetic acid into mixed-halide perovskites, which can provide additional chloride to fill halide vacancies, passivate the uncoordinated Pb2+ ion defects, and promote the crystallization effectively. Owning to the utilization of trichloroacetic acid, the ultimate pure-blue perovskite LED obtains stable electroluminescent spectra at 477 nm under various bias and demonstrates a 5-fold external quantum efficiency improvement (up to 6.6%).
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Affiliation(s)
- Lihui Liu
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications (NUPT), Nanjing 210023, China
| | - Junxian Piao
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications (NUPT), Nanjing 210023, China
| | - Yun Wang
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications (NUPT), Nanjing 210023, China
| | - Chenxi Liu
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications (NUPT), Nanjing 210023, China
| | - Jian Chen
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications (NUPT), Nanjing 210023, China
| | - Kun Cao
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications (NUPT), Nanjing 210023, China
| | - Shufen Chen
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications (NUPT), Nanjing 210023, China
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25
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Hsieh C, Tan G, Chuang Y, Lin H, Lai P, Jan P, Chen B, Lu C, Yang S, Hsiao K, Lu M, Chen L, Lin H. Vacuum-Deposited Inorganic Perovskite Light-Emitting Diodes with External Quantum Efficiency Exceeding 10% via Composition and Crystallinity Manipulation of Emission Layer under High Vacuum. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2206076. [PMID: 36748267 PMCID: PMC10074115 DOI: 10.1002/advs.202206076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 12/16/2022] [Indexed: 06/18/2023]
Abstract
Although vacuum-deposited metal halide perovskite light-emitting diodes (PeLEDs) have great promise for use in large-area high-color-gamut displays, the efficiency of vacuum-sublimed PeLEDs currently lags that of solution-processed counterparts. In this study, highly efficient vacuum-deposited PeLEDs are prepared through a process of optimizing the stoichiometric ratio of the sublimed precursors under high vacuum and incorporating ultrathin under- and upper-layers for the perovskite emission layer (EML). In contrast to the situation in most vacuum-deposited organic light-emitting devices, the properties of these perovskite EMLs are highly influenced by the presence and nature of the upper- and presublimed materials, thereby allowing us to enhance the performance of the resulting devices. By eliminating Pb° formation and passivating defects in the perovskite EMLs, the PeLEDs achieve an outstanding external quantum efficiency (EQE) of 10.9% when applying a very smooth and flat geometry; it reaches an extraordinarily high value of 21.1% when integrating a light out-coupling structure, breaking through the 10% EQE milestone of vacuum-deposited PeLEDs.
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Affiliation(s)
- Chung‐An Hsieh
- Department of PhotonicsNational Yang MingChiao Tung UniversityNo. 1001 University RoadHsinchu300Taiwan
| | - Guang‐Hsun Tan
- Department of Materials Science and EngineeringNational Tsing Hua UniversityHsinchu30013Taiwan
| | - Yung‐Tang Chuang
- Department of Materials Science and EngineeringNational Tsing Hua UniversityHsinchu30013Taiwan
| | - Hao‐Cheng Lin
- Department of Materials Science and EngineeringNational Tsing Hua UniversityHsinchu30013Taiwan
| | - Po‐Ting Lai
- Department of Materials Science and EngineeringNational Tsing Hua UniversityHsinchu30013Taiwan
| | - Pei‐En Jan
- Department of Materials Science and EngineeringNational Tsing Hua UniversityHsinchu30013Taiwan
| | - Bo‐Han Chen
- Institute of Photonics TechnologiesNational Tsing Hua UniversityHsinchu30013Taiwan
| | - Chih‐Hsuan Lu
- Institute of Photonics TechnologiesNational Tsing Hua UniversityHsinchu30013Taiwan
| | - Shang‐Da Yang
- Institute of Photonics TechnologiesNational Tsing Hua UniversityHsinchu30013Taiwan
| | - Kai‐Yuan Hsiao
- Department of Materials Science and EngineeringNational Tsing Hua UniversityHsinchu30013Taiwan
| | - Ming‐Yen Lu
- Department of Materials Science and EngineeringNational Tsing Hua UniversityHsinchu30013Taiwan
| | - Li‐Yin Chen
- Department of PhotonicsNational Yang MingChiao Tung UniversityNo. 1001 University RoadHsinchu300Taiwan
| | - Hao‐Wu Lin
- Department of Materials Science and EngineeringNational Tsing Hua UniversityHsinchu30013Taiwan
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26
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Zhang D, Fu Y, Wu W, Li B, Zhu H, Zhan H, Cheng Y, Qin C, Wang L. Comprehensive Passivation for High-Performance Quasi-2D Perovskite LEDs. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2206927. [PMID: 36541740 DOI: 10.1002/smll.202206927] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 11/30/2022] [Indexed: 06/17/2023]
Abstract
Quasi-2D perovskites have demonstrated great application potential in light-emitting diodes (LEDs). Defect passivation with chemicals plays a critical role to achieve high efficiency. However, there are still challenges in comprehensively passivating the defects distributed at surface, bulk, and buried interface of quasi-2D perovskite emitting films, hindering the further improvement of device performance. Herein, 9,9-substituted fluorene derivatives with different terminal functional groups are developed tactfully to realize comprehensive passivation, which greatly contributes to reducing nonradiative recombination at surface, suppressing ion migration in bulk, and filling interfacial charge traps at buried interface, respectively. Eventually, quasi-2D perovskite LEDs have an increased external quantum efficiency from 18.2% to 23.2%, improved operation lifetime by more than six times and lower turn-on voltage simultaneously. Here the importance of comprehensive passivation is highlighted and guidelines for the design and application of passivators for perovskite optoelectronics are provided.
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Affiliation(s)
- Dezhong Zhang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
| | - Yunxing Fu
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, 230026, China
| | - Wenping Wu
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, 230026, China
| | - Binhe Li
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, 230026, China
| | - Helong Zhu
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, 230026, China
| | - Hongmei Zhan
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
| | - Yanxiang Cheng
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
| | - Chuanjiang Qin
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, 230026, China
| | - Lixiang Wang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
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27
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Fu Y, Zhan H, Zhang D, Cheng Y, Wang L, Qin C. Insight into Diphenyl Phosphine Oxygen-Based Molecular Additives as Defect Passivators toward Efficient Quasi-2D Perovskite Light-Emitting Diodes. ACS APPLIED MATERIALS & INTERFACES 2023; 15:10877-10884. [PMID: 36795030 DOI: 10.1021/acsami.2c19646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
The introduction of additives has become an important method for enhancing the device performance of quasi-two-dimensional perovskite light-emitting diodes. In this work, we systematically studied the electronic and spatial effects of molecular additives on defect passivation abilities using the methyl, hydrogen, and hydroxyl groups substituted three diphenyl phosphine oxygen additives. The electron-donating conjugation effect of the hydroxyl group on diphenylphosphinic acid (OH-DPPO) leads to a more electron-rich region in OH-DPPO, and the hydroxyl group has a moderate steric hindrance. All these factors endow it with best passivation ability than the other two additives. Furthermore, ion migration was suppressed due to hydrogen bonding between the hydroxyl group and Br. Ultimately, the OH-DPPO passivated devices achieved an external quantum efficiency of 22.44% and a 6-fold improvement in lifetime. These findings provide guidance for developing multifunctional additives in the field of perovskite optoelectronics.
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Affiliation(s)
- Yunxing Fu
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Hongmei Zhan
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Dezhong Zhang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Yanxiang Cheng
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Lixiang Wang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Chuanjiang Qin
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, China
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28
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Sun Y, Ge L, Dai L, Cho C, Ferrer Orri J, Ji K, Zelewski SJ, Liu Y, Mirabelli AJ, Zhang Y, Huang JY, Wang Y, Gong K, Lai MC, Zhang L, Yang D, Lin J, Tennyson EM, Ducati C, Stranks SD, Cui LS, Greenham NC. Bright and stable perovskite light-emitting diodes in the near-infrared range. Nature 2023; 615:830-835. [PMID: 36922588 DOI: 10.1038/s41586-023-05792-4] [Citation(s) in RCA: 40] [Impact Index Per Article: 40.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Accepted: 02/03/2023] [Indexed: 03/17/2023]
Abstract
Perovskite light-emitting diodes (LEDs) have attracted broad attention due to their rapidly increasing external quantum efficiencies (EQEs)1-15. However, most high EQEs of perovskite LEDs are reported at low current densities (<1 mA cm-2) and low brightness. Decrease in efficiency and rapid degradation at high brightness inhibit their practical applications. Here, we demonstrate perovskite LEDs with exceptional performance at high brightness, achieved by the introduction of a multifunctional molecule that simultaneously removes non-radiative regions in the perovskite films and suppresses luminescence quenching of perovskites at the interface with charge-transport layers. The resulting LEDs emit near-infrared light at 800 nm, show a peak EQE of 23.8% at 33 mA cm-2 and retain EQEs more than 10% at high current densities of up to 1,000 mA cm-2. In pulsed operation, they retain EQE of 16% at an ultrahigh current density of 4,000 mA cm-2, along with a high radiance of more than 3,200 W s-1 m-2. Notably, an operational half-lifetime of 32 h at an initial radiance of 107 W s-1 m-2 has been achieved, representing the best stability for perovskite LEDs having EQEs exceeding 20% at high brightness levels. The demonstration of efficient and stable perovskite LEDs at high brightness is an important step towards commercialization and opens up new opportunities beyond conventional LED technologies, such as perovskite electrically pumped lasers.
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Affiliation(s)
- Yuqi Sun
- Cavendish Laboratory, University of Cambridge, Cambridge, UK
| | - Lishuang Ge
- Key Laboratory of Precision and Intelligent Chemistry, University of Science and Technology of China (USTC), Hefei, China
- CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China (USTC), Hefei, China
| | - Linjie Dai
- Cavendish Laboratory, University of Cambridge, Cambridge, UK
| | - Changsoon Cho
- Cavendish Laboratory, University of Cambridge, Cambridge, UK
| | - Jordi Ferrer Orri
- Cavendish Laboratory, University of Cambridge, Cambridge, UK
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge, UK
- Department of Materials Science and Metallurgy, University of Cambridge, Cambridge, UK
| | - Kangyu Ji
- Cavendish Laboratory, University of Cambridge, Cambridge, UK
| | - Szymon J Zelewski
- Cavendish Laboratory, University of Cambridge, Cambridge, UK
- Department of Semiconductor Materials Engineering, Faculty of Fundamental Problems of Technology, Wrocław University of Science and Technology, Wrocław, Poland
| | - Yun Liu
- Cavendish Laboratory, University of Cambridge, Cambridge, UK
- Institute of High Performance Computing, Agency for Science Technology and Research, Singapore, Singapore
| | - Alessandro J Mirabelli
- Cavendish Laboratory, University of Cambridge, Cambridge, UK
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge, UK
| | - Youcheng Zhang
- Cavendish Laboratory, University of Cambridge, Cambridge, UK
| | - Jun-Yu Huang
- Cavendish Laboratory, University of Cambridge, Cambridge, UK
| | - Yusong Wang
- Hefei National Research Centre for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, China
| | - Ke Gong
- Hefei National Research Centre for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, China
| | - May Ching Lai
- Department of Materials Science and Metallurgy, University of Cambridge, Cambridge, UK
| | - Lu Zhang
- Cavendish Laboratory, University of Cambridge, Cambridge, UK
| | - Dan Yang
- CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China (USTC), Hefei, China
| | - Jiudong Lin
- CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China (USTC), Hefei, China
| | | | - Caterina Ducati
- Department of Materials Science and Metallurgy, University of Cambridge, Cambridge, UK
| | - Samuel D Stranks
- Cavendish Laboratory, University of Cambridge, Cambridge, UK
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge, UK
| | - Lin-Song Cui
- Key Laboratory of Precision and Intelligent Chemistry, University of Science and Technology of China (USTC), Hefei, China.
- CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China (USTC), Hefei, China.
| | - Neil C Greenham
- Cavendish Laboratory, University of Cambridge, Cambridge, UK.
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29
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Zhang HJ, Liu YF, Zheng X, Feng J. Improved Performance of All-Inorganic Perovskite Light-emitting Diodes via Nanostructured Stamp Imprinting. Chemphyschem 2023; 24:e202200860. [PMID: 36782095 DOI: 10.1002/cphc.202200860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2022] [Revised: 01/23/2023] [Indexed: 02/15/2023]
Abstract
Halide perovskites are emerging emitters with excellent optoelectronic properties. Contrary to the large grain fabrication goal in perovskite solar cells, perovskite light-emitting diodes (PeLEDs) based on small grain enable efficient radiative recombination because of relatively higher charge carrier densities due to spatial confinement. However, achieving small-sized grain growth with superior crystal quality and film morphology remains a challenge. In this work, we demonstrated a nanostructured stamp thermal imprinting strategy to boost the surface coverage and improve the crystalline quality of CsPbBr3 film, particularly confine the grain size, leading to the improvement of luminance and efficiency of PeLEDs. We improved the thermal imprinting process utilizing the nanostructured stamp to selectively manipulate the nucleation and growth in the nanoscale region and acquire small-sized grain accompanied by improved crystal quality and surface morphology of the film. By optimizing the imprinting pressure and the period of the nanostructures, appropriate grain size, high surface coverage, small surface roughness and improved crystallization could be achieved synchronously. Finally, the maximum luminance and efficiency of PeLEDs achieved by nanostructured stamp imprinting with a period of 320 nm are 67600 cd/m2 and 16.36 cd/A, respectively. This corresponds to improvements of 123 % in luminance and 100 % in efficiency, compared to that of PeLEDs without the imprinting.
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Affiliation(s)
- Hai-Jing Zhang
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun, 130012, China
| | - Yue-Feng Liu
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun, 130012, China
| | - Xin Zheng
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun, 130012, China
| | - Jing Feng
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun, 130012, China
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30
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Lu Y, Shen Y, Li YQ, Shen KC, Zhou W, Tang JX. Unveiling the degraded electron durability in reduced-dimensional perovskites. NANOSCALE 2023; 15:2798-2805. [PMID: 36662239 DOI: 10.1039/d2nr06635a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
The operational stability of reduced-dimensional metal halide perovskites (RD-MHPs) lags far behind the practical requirements for future high-definition displays. Thereinto, the electron durability of RD-MHPs plays a critical role in stable LEDs during continuous operation, however, it still lacks adequate research and a deep understanding. Herein, the electron durability and deterioration mechanism of phenethylammonium (PEA+)-modified RD-MHPs are systematically conducted through an in situ photoelectron spectroscopy technique by implementing tunable electron-beam radiation to simulate device operation. The formation of detrimental metallic lead (Pb0) caused by the reduction of lead ions (Pb2+) is observed along with the decomposition of PEA+ under electron-beam radiation, thereby changing the photophysical properties of PEA+-doped RD-MHPs. These results provide deep insight into the process of how injected electrons affect the performance of PEA+-doped perovskite LEDs, which may also provide potential guidance for designing robust and effective organic spacers for RD-MHPs.
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Affiliation(s)
- Yu Lu
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, Jiangsu 215123, China.
| | - Yang Shen
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, Jiangsu 215123, China.
| | - Yan-Qing Li
- School of Physics and Electronic Science, Ministry of Education Nanophotonics and Advanced Instrument Engineering Research Center, East China Normal University, Shanghai 200241, China.
| | - Kong-Chao Shen
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, Jiangsu 215123, China.
| | - Wei Zhou
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, Jiangsu 215123, China.
| | - Jian-Xin Tang
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, Jiangsu 215123, China.
- Macao Institute of Materials Science and Engineering (MIMSE), Faculty of Innovation Engineering, Macau University of Science and Technology, Taipa 999078, Macao SAR, China
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31
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Li H, Hu S, Wang H, Zhang X, Tong Y, Qi H, Guo P, Zhao G, Gao J, Liu P, Zang J, Hao H, Liu T, Bian H, Zhang Y, Wei Y, Guo Y, Zhang L, Fang Y, Wang H. Control of n-Phase Distribution in Quasi Two-Dimensional Perovskite for Efficient Blue Light-Emitting Diodes. ACS APPLIED MATERIALS & INTERFACES 2023; 15:9574-9583. [PMID: 36753052 DOI: 10.1021/acsami.2c19979] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Pure-bromide quasi-2D perovskite (PBQ-2DP) promises high-performance light-emitting diodes (LEDs), while a challenge remains on control over its n-phase distribution for bright true-blue emission. Present work addresses the challenge through exploring the passivation molecule of amino acid with reinforced binding energy, which generates narrow n-phase distribution preferentially at n = 3 with true blue emission at 478 nm. Consequently, a peak external quantum efficiency of 5.52% and a record brightness of 512 cd m-2 are achieved on the PBQ-2DP-based true blue PeLED, these both values located among the top in the records of similar devices. We further reveal that the electron-phonon coupling results in the red-shifted emission in the PBQ-2DP film, suggesting that the view of n-phase distribution dominated true-blue emission in PBQ-2DP needs to be revisited, pointing out a guideline of electron-phonon coupling suppression to relieve the strait of realizing true blue or even deep blue emission in the PBQ-2DP film.
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Affiliation(s)
- Huixin Li
- State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene, Xi'an 710072, China
| | - Siliang Hu
- State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene, Xi'an 710072, China
| | - Hongyue Wang
- State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene, Xi'an 710072, China
- Chongqing Innovation Center, Northwestern Polytechnical University, Chongqing 401135, China
| | - Xiuhai Zhang
- State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene, Xi'an 710072, China
| | - Yu Tong
- State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene, Xi'an 710072, China
| | - Heng Qi
- State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene, Xi'an 710072, China
| | - Pengfei Guo
- State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene, Xi'an 710072, China
- Chongqing Innovation Center, Northwestern Polytechnical University, Chongqing 401135, China
| | - Guanguan Zhao
- State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene, Xi'an 710072, China
| | - Jialiang Gao
- State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene, Xi'an 710072, China
| | - Peng Liu
- State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene, Xi'an 710072, China
| | - Jianyang Zang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China
| | - Hongxing Hao
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China
| | - Taihong Liu
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China
| | - Hongtao Bian
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China
| | - Youqian Zhang
- State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene, Xi'an 710072, China
| | - Yang Wei
- State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene, Xi'an 710072, China
| | - Yangyang Guo
- State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene, Xi'an 710072, China
| | - Lei Zhang
- School of Optoelectronic Engineering, Xidian University, Xi'an 710071, China
| | - Yu Fang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China
| | - Hongqiang Wang
- State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene, Xi'an 710072, China
- Chongqing Innovation Center, Northwestern Polytechnical University, Chongqing 401135, China
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32
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Liu T, Guo X, Liu Y, Hou M, Yuan Y, Mai X, Fedorovich KV, Wang N. 4-Trifluorophenylammonium Iodide-Based Dual Interfacial Modification Engineering toward Improved Efficiency and Stability of SnO 2-Based Perovskite Solar Cells. ACS APPLIED MATERIALS & INTERFACES 2023; 15:6777-6787. [PMID: 36709450 DOI: 10.1021/acsami.2c19549] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Passivation engineering has been identified as an effective strategy to eliminate the targeted interfacial defects for improving the efficiency and stability of perovskite solar cells (PSCs). Herein, 4-trifluorophenylammonium iodide (CF3PhAI) is presented as a multifunctional passivation agent to modify buried SnO2/perovskite and perovskite/hole transport layer (HTL) interfaces. Upon incorporation of CF3PhAI between SnO2 and perovskite, CF3PhAI can chemically link to SnO2 via Lewis coordination and electrostatic coupling, thereby effectively passivating under-coordinated Sn and filling the oxygen vacancy. Meanwhile, CF3PhAI helps anchor PbI2 and organic cations (MA+/FA+) to control the crystallization of the perovskite. Consequently, reduced interfacial defects, homogeneous perovskite crystallites, and better energetic alignment can be simultaneously achieved. When CF3PhAI was further used to modify the perovskite/HTL interface, the fabricated PSCs yielded an impressive power conversion efficiency of 23.06% together with negligible J-V hysteresis. The unencapsulated devices exhibited long-term stability in wet conditions (91.8% efficiency retention after 1000 h) due to the water-resistant CF3PhAI. We also achieved good light soaking stability, maintaining 86.1% of its initial efficiency after aging for 720 h. Overall, our finding provides a promising strategy for modifying the dual contact interfaces of PSCs toward improved efficiency and stability.
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Affiliation(s)
- Tao Liu
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou570228, P. R. China
| | - Xi Guo
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou570228, P. R. China
| | - Yinjiang Liu
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou570228, P. R. China
| | - Meichen Hou
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou570228, P. R. China
| | - Yihui Yuan
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou570228, P. R. China
| | - Xianmin Mai
- School of Architecture, Southwest Minzu University, Chengdu610041, P. R. China
| | - Kuzin Victor Fedorovich
- Section of Geology, Mining and Processing of Minerals, Russian Engineering Academy, Moscow125009, Russia
| | - Ning Wang
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou570228, P. R. China
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33
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Zhu Z, Li Y, Guan Z, Wu Y, Zeng Z, Tsang SW, Liu S, Huang X, Lee CS. Spatial Control of the Hole Accumulation Zone for Hole-Dominated Perovskite Light-Emitting Diodes by Inserting a CsAc Layer. ACS APPLIED MATERIALS & INTERFACES 2023; 15:7044-7052. [PMID: 36705641 DOI: 10.1021/acsami.2c19230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Perovskites show efficient electroluminescence and are expected to have wide applications in light-emitting diodes (LEDs). However, owing to the unbalanced electron-hole transport properties of some highly luminescent perovskites, a fundamental challenge is that the exciton recombination zone of perovskite LEDs (PeLEDs) typically overlaps with an accumulation of the major carrier. It is known to reduce the performances of PeLEDs, leading to a reduction of efficiency and operation stability due to Auger recombination. To address this issue in a hole-dominated blue PeLED, we propose to insert a cesium acetate (CsAc) layer between the hole transport layer (HTL) and the hole-dominant perovskite layer. Electronic properties indicate that the hole accumulation zone of the device with the CsAc layer shifts away from the perovskite/ETL interface, i.e., the recombination zone, to the HTL/CsAc interface. Separation of the hole accumulation region and the exciton recombination zones substantially suppresses exciton quenching. Moreover, the CsAc layer can also improve the photophysical properties of the perovskite film by providing an extra Cs source to interact with the defect site of unreacted PbBr2 in the perovskite film and enhance the crystallinity of the perovskite with an enlarged crystal grain size. As a result, the external quantum efficiency (EQE) of the sky-blue PeLEDs shows considerable improvement from 5.3 to 9.2% upon inserting the CsAc layer.
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Affiliation(s)
- Zhaohua Zhu
- Center of Super-Diamond and Advanced Films (COSDAF), City University of Hong Kong, Kowloon, Hong Kong SAR 000000, P. R. China
- Department of Chemistry, City University of Hong Kong, Kowloon 000000, Hong Kong SAR, P. R. China
| | - Yang Li
- Center of Super-Diamond and Advanced Films (COSDAF), City University of Hong Kong, Kowloon, Hong Kong SAR 000000, P. R. China
- Department of Chemistry, City University of Hong Kong, Kowloon 000000, Hong Kong SAR, P. R. China
| | - Zhiqiang Guan
- Center of Super-Diamond and Advanced Films (COSDAF), City University of Hong Kong, Kowloon, Hong Kong SAR 000000, P. R. China
- Department of Chemistry, City University of Hong Kong, Kowloon 000000, Hong Kong SAR, P. R. China
| | - Yan Wu
- Center of Super-Diamond and Advanced Films (COSDAF), City University of Hong Kong, Kowloon, Hong Kong SAR 000000, P. R. China
- Department of Chemistry, City University of Hong Kong, Kowloon 000000, Hong Kong SAR, P. R. China
| | - Zixin Zeng
- Department of Material Science and Engineering, City University of Hong Kong, Kowloon 000000, Hong Kong SAR, P. R. China
| | - Sai-Wing Tsang
- Department of Material Science and Engineering, City University of Hong Kong, Kowloon 000000, Hong Kong SAR, P. R. China
| | - Shihao Liu
- Center of Super-Diamond and Advanced Films (COSDAF), City University of Hong Kong, Kowloon, Hong Kong SAR 000000, P. R. China
- Department of Chemistry, City University of Hong Kong, Kowloon 000000, Hong Kong SAR, P. R. China
| | - Xiao Huang
- Institute of Advanced Materials (IAM), Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, P. R. China
| | - Chun-Sing Lee
- Center of Super-Diamond and Advanced Films (COSDAF), City University of Hong Kong, Kowloon, Hong Kong SAR 000000, P. R. China
- Department of Chemistry, City University of Hong Kong, Kowloon 000000, Hong Kong SAR, P. R. China
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34
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Zhang J, Zhang T, Ma Z, Yuan F, Zhou X, Wang H, Liu Z, Qing J, Chen H, Li X, Su S, Xie J, Shi Z, Hou L, Shan C. A Multifunctional "Halide-Equivalent" Anion Enabling Efficient CsPb(Br/I) 3 Nanocrystals Pure-Red Light-Emitting Diodes with External Quantum Efficiency Exceeding 23. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2209002. [PMID: 36493461 DOI: 10.1002/adma.202209002] [Citation(s) in RCA: 20] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 11/28/2022] [Indexed: 06/17/2023]
Abstract
Pure-red perovskite LEDs (PeLEDs) based on CsPb(Br/I)3 nanocrystals (NCs) usually suffer from a compromise in emission efficiency and spectral stability on account of the surface halide vacancies-induced nonradiative recombination loss, halide phase segregation, and self-doping effect. Herein, a "halide-equivalent" anion of benzenesulfonate (BS- ) is introduced into CsPb(Br/I)3 NCs as multifunctional additive to simultaneously address the above challenging issues. Joint experiment-theory characterizations reveal that the BS- can not only passivate the uncoordinated Pb2+ -related defects at the surface of NCs, but also increase the formation energy of halide vacancies. Moreover, because of the strong electron-withdrawing property of sulfonate group, electrons are expected to transfer from the CsPb(Br/I)3 NC to BS- for reducing the self-doping effect and altering the n-type behavior of CsPb(Br/I)3 NCs to near ambipolarity. Eventually, synergistic boost in device performance is achieved for pure-red PeLEDs with CIE coordinates of (0.70, 0.30) and a champion external quantum efficiency of 23.5%, which is one of the best value among the ever-reported red PeLEDs approaching to the Rec. 2020 red primary color. Moreover, the BS- -modified PeLED exhibits negligible wavelength shift under different operating voltages. This strategy paves an efficient way for improving the efficiency and stability of pure-red PeLEDs.
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Affiliation(s)
- Jibin Zhang
- Key Laboratory of Materials Physics of Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Daxue Road 75, Zhengzhou, 450052, China
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Siyuan laboratory, Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Department of Physics, Jinan University, Guangzhou, 510632, P. R. China
| | - Tiankai Zhang
- Department of Physics, Chemistry, and Biology (IFM), Linköping University, Linköping, SE-58183, Sweden
| | - Zhuangzhuang Ma
- Key Laboratory of Materials Physics of Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Daxue Road 75, Zhengzhou, 450052, China
| | - Fanglong Yuan
- Department of Physics, Chemistry, and Biology (IFM), Linköping University, Linköping, SE-58183, Sweden
- Key Laboratory of Theoretical & Computational Photochemistry of Ministry of Education, College of Chemistry, Beijing Normal University, Beijing, 100875, China
| | - Xin Zhou
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Siyuan laboratory, Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Department of Physics, Jinan University, Guangzhou, 510632, P. R. China
| | - Heyong Wang
- Department of Physics, Chemistry, and Biology (IFM), Linköping University, Linköping, SE-58183, Sweden
- Center for Nano Science and Technology @PoliMi, Istituto Italiano di Tecnologia, Milan, 20133, Italy
| | - Zhe Liu
- State Key Laboratory of Luminescent Materials and Devices, Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Guangzhou, 510640, China
| | - Jian Qing
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Siyuan laboratory, Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Department of Physics, Jinan University, Guangzhou, 510632, P. R. China
| | - Hongting Chen
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Siyuan laboratory, Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Department of Physics, Jinan University, Guangzhou, 510632, P. R. China
| | - Xinjian Li
- Key Laboratory of Materials Physics of Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Daxue Road 75, Zhengzhou, 450052, China
| | - Shijian Su
- State Key Laboratory of Luminescent Materials and Devices, Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Guangzhou, 510640, China
| | - Jianing Xie
- Guangdong-Hong Kong-Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology, School of Physics and Optoelectronic Engineering, Foshan University, Foshan, 528225, China
| | - Zhifeng Shi
- Key Laboratory of Materials Physics of Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Daxue Road 75, Zhengzhou, 450052, China
| | - Lintao Hou
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Siyuan laboratory, Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Department of Physics, Jinan University, Guangzhou, 510632, P. R. China
| | - Chongxin Shan
- Key Laboratory of Materials Physics of Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Daxue Road 75, Zhengzhou, 450052, China
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35
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Wang K, Lin ZY, Zhang Z, Jin L, Ma K, Coffey AH, Atapattu HR, Gao Y, Park JY, Wei Z, Finkenauer BP, Zhu C, Meng X, Chowdhury SN, Chen Z, Terlier T, Do TH, Yao Y, Graham KR, Boltasseva A, Guo TF, Huang L, Gao H, Savoie BM, Dou L. Suppressing phase disproportionation in quasi-2D perovskite light-emitting diodes. Nat Commun 2023; 14:397. [PMID: 36693860 PMCID: PMC9873927 DOI: 10.1038/s41467-023-36118-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2022] [Accepted: 01/17/2023] [Indexed: 01/26/2023] Open
Abstract
Electroluminescence efficiencies and stabilities of quasi-two-dimensional halide perovskites are restricted by the formation of multiple-quantum-well structures with broad and uncontrollable phase distributions. Here, we report a ligand design strategy to substantially suppress diffusion-limited phase disproportionation, thereby enabling better phase control. We demonstrate that extending the π-conjugation length and increasing the cross-sectional area of the ligand enables perovskite thin films with dramatically suppressed ion transport, narrowed phase distributions, reduced defect densities, and enhanced radiative recombination efficiencies. Consequently, we achieved efficient and stable deep-red light-emitting diodes with a peak external quantum efficiency of 26.3% (average 22.9% among 70 devices and cross-checked) and a half-life of ~220 and 2.8 h under a constant current density of 0.1 and 12 mA/cm2, respectively. Our devices also exhibit wide wavelength tunability and improved spectral and phase stability compared with existing perovskite light-emitting diodes. These discoveries provide critical insights into the molecular design and crystallization kinetics of low-dimensional perovskite semiconductors for light-emitting devices.
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Affiliation(s)
- Kang Wang
- grid.169077.e0000 0004 1937 2197Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN USA
| | - Zih-Yu Lin
- grid.169077.e0000 0004 1937 2197Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN USA
| | - Zihan Zhang
- grid.255986.50000 0004 0472 0419Department of Physics, Florida State University, Tallahassee, FL USA
| | - Linrui Jin
- grid.169077.e0000 0004 1937 2197Department of Chemistry, Purdue University, West Lafayette, IN USA
| | - Ke Ma
- grid.169077.e0000 0004 1937 2197Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN USA
| | - Aidan H. Coffey
- grid.169077.e0000 0004 1937 2197Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN USA
| | - Harindi R. Atapattu
- grid.266539.d0000 0004 1936 8438Department of Chemistry, University of Kentucky, Lexington, KY USA
| | - Yao Gao
- grid.169077.e0000 0004 1937 2197Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN USA
| | - Jee Yung Park
- grid.169077.e0000 0004 1937 2197Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN USA
| | - Zitang Wei
- grid.169077.e0000 0004 1937 2197Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN USA
| | - Blake P. Finkenauer
- grid.169077.e0000 0004 1937 2197Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN USA
| | - Chenhui Zhu
- grid.184769.50000 0001 2231 4551Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA USA
| | - Xiangeng Meng
- grid.443420.50000 0000 9755 8940School of Materials Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China
| | - Sarah N. Chowdhury
- grid.169077.e0000 0004 1937 2197Birck Nanotechnology Center, Purdue University, West Lafayette, IN USA
| | - Zhaoyang Chen
- grid.266436.30000 0004 1569 9707Department of Electrical and Computer Engineering and Texas Center for Superconductivity at the University of Houston (TcSUH), University of Houston, Houston, TX USA
| | - Tanguy Terlier
- grid.21940.3e0000 0004 1936 8278SIMS laboratory, Shared Equipment Authority, Rice University, Houston, TX USA
| | - Thi-Hoai Do
- grid.64523.360000 0004 0532 3255Department of Photonics, National Cheng Kung University, Tainan, Taiwan
| | - Yan Yao
- grid.266436.30000 0004 1569 9707Department of Electrical and Computer Engineering and Texas Center for Superconductivity at the University of Houston (TcSUH), University of Houston, Houston, TX USA
| | - Kenneth R. Graham
- grid.266539.d0000 0004 1936 8438Department of Chemistry, University of Kentucky, Lexington, KY USA
| | - Alexandra Boltasseva
- grid.169077.e0000 0004 1937 2197Birck Nanotechnology Center, Purdue University, West Lafayette, IN USA
| | - Tzung-Fang Guo
- grid.64523.360000 0004 0532 3255Department of Photonics, National Cheng Kung University, Tainan, Taiwan
| | - Libai Huang
- grid.169077.e0000 0004 1937 2197Department of Chemistry, Purdue University, West Lafayette, IN USA
| | - Hanwei Gao
- grid.255986.50000 0004 0472 0419Department of Physics, Florida State University, Tallahassee, FL USA
| | - Brett M. Savoie
- grid.169077.e0000 0004 1937 2197Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN USA
| | - Letian Dou
- grid.169077.e0000 0004 1937 2197Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN USA ,grid.169077.e0000 0004 1937 2197Birck Nanotechnology Center, Purdue University, West Lafayette, IN USA
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36
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Zhao Y, Li M, Qin X, Yang P, Zhang WH, Wei Z. Efficient Perovskite Light-Emitting Diodes by Buried Interface Modification with Triphenylphosphine Oxide. ACS APPLIED MATERIALS & INTERFACES 2023; 15:3644-3650. [PMID: 36608314 DOI: 10.1021/acsami.2c19123] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Metal halide perovskite films are prepared mainly by solution-based methods. However, the preparation process is prone to produce massive defects at the interface between the perovskite emitting layer and the charge transport layers, limiting the perovskite light-emitting diode device performance. Aiming at this problem, researchers have proposed many effective strategies to passivate these interface defects. However, most previous research studies only focus on modifying the perovskite top interface, and very few reports deal with the buried interface. Here, we deposited triphenylphosphine oxide (TPPO) molecules between the perovskite and the hole transport layer (HTL) and realized the buried interface modification. Adding TPPO avoids the contact recombination of the perovskite and HTL and improves the film quality by increasing the substrate wettability. Moreover, the lone pair electrons of P═O can interact with the uncoordinated lead (Pb2+) of the perovskite and passivate halogen vacancy defects, and the insulation property of TPPO helps to balance the injection of holes and electrons. As a result, a maximum external quantum efficiency (EQEmax) of 21.01% was obtained with an average of 18.4 ± 0.9% over 30 devices, and the device reproducibility was greatly enhanced.
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Affiliation(s)
- Yaping Zhao
- Xiamen Key Laboratory of Optoelectronic Materials and Advanced Manufacturing, Institute of Luminescent Materials and Information Displays, College of Materials Science and Engineering, Huaqiao University, Xiamen 361021, China
| | - Mingliang Li
- Xiamen Key Laboratory of Optoelectronic Materials and Advanced Manufacturing, Institute of Luminescent Materials and Information Displays, College of Materials Science and Engineering, Huaqiao University, Xiamen 361021, China
- Sichuan Research Center of New Materials, Institute of Chemical Materials, China Academy of Engineering Physics, Chengdu 610200, China
| | - Xiangqian Qin
- Xiamen Key Laboratory of Optoelectronic Materials and Advanced Manufacturing, Institute of Luminescent Materials and Information Displays, College of Materials Science and Engineering, Huaqiao University, Xiamen 361021, China
| | - PanPan Yang
- Xiamen Key Laboratory of Optoelectronic Materials and Advanced Manufacturing, Institute of Luminescent Materials and Information Displays, College of Materials Science and Engineering, Huaqiao University, Xiamen 361021, China
| | - Wen-Hua Zhang
- Sichuan Research Center of New Materials, Institute of Chemical Materials, China Academy of Engineering Physics, Chengdu 610200, China
| | - Zhanhua Wei
- Xiamen Key Laboratory of Optoelectronic Materials and Advanced Manufacturing, Institute of Luminescent Materials and Information Displays, College of Materials Science and Engineering, Huaqiao University, Xiamen 361021, China
- Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen 361005, China
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37
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Liu Y, Tao C, Cao Y, Chen L, Wang S, Li P, Wang C, Liu C, Ye F, Hu S, Xiao M, Gao Z, Gui P, Yao F, Dong K, Li J, Hu X, Cong H, Jia S, Wang T, Wang J, Li G, Huang W, Ke W, Wang J, Fang G. Synergistic passivation and stepped-dimensional perovskite analogs enable high-efficiency near-infrared light-emitting diodes. Nat Commun 2022; 13:7425. [PMID: 36460647 PMCID: PMC9718757 DOI: 10.1038/s41467-022-35218-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Accepted: 11/23/2022] [Indexed: 12/03/2022] Open
Abstract
Formamidinium lead iodide (FAPbI3) perovskites are promising emitters for near-infrared light-emitting diodes. However, their performance is still limited by defect-assisted nonradiative recombination and band offset-induced carrier aggregation at the interface. Herein, we introduce a couple of cadmium salts with acetate or halide anion into the FAPbI3 perovskite precursors to synergistically passivate the material defects and optimize the device band structure. Particularly, the perovskite analogs, containing zero-dimensional formamidinium cadmium iodide, one-dimensional δ-FAPbI3, two-dimensional FA2FAn-1PbnI3n+1, and three-dimensional α-FAPbI3, can be obtained in one pot and play a pivotal and positive role in energy transfer in the formamidinium iodide-rich lead-based perovskite films. As a result, the near-infrared FAPbI3-based devices deliver a maximum external quantum efficiency of 24.1% together with substantially improved operational stability. Combining our findings on defect passivation and energy transfer, we also achieve near-infrared light communication with device twins of light emitting and unprecedented self-driven detection.
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Affiliation(s)
- Yongjie Liu
- grid.49470.3e0000 0001 2331 6153Key Lab of Artificial Micro- and Nano-Structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, China
| | - Chen Tao
- grid.49470.3e0000 0001 2331 6153Key Lab of Artificial Micro- and Nano-Structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, China
| | - Yu Cao
- grid.412022.70000 0000 9389 5210Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (Nanjing Tech), Nanjing, China ,grid.440588.50000 0001 0307 1240Institute of Flexible Electronics, Northwestern Polytechnical University (NPU), Xi’an, China
| | - Liangyan Chen
- grid.412969.10000 0004 1798 1968School of Electrical and Electronic Engineering, Wuhan Polytechnic University, Wuhan, China
| | - Shuxin Wang
- grid.49470.3e0000 0001 2331 6153Key Lab of Artificial Micro- and Nano-Structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, China
| | - Pei Li
- grid.49470.3e0000 0001 2331 6153Key Lab of Artificial Micro- and Nano-Structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, China
| | - Cheng Wang
- grid.49470.3e0000 0001 2331 6153Key Lab of Artificial Micro- and Nano-Structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, China
| | - Chenwei Liu
- grid.49470.3e0000 0001 2331 6153Key Lab of Artificial Micro- and Nano-Structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, China
| | - Feihong Ye
- grid.49470.3e0000 0001 2331 6153Key Lab of Artificial Micro- and Nano-Structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, China
| | - Shengyong Hu
- grid.41156.370000 0001 2314 964XNational Laboratory of Solid-State Microstructures, School of Physics, Nanjing University, Nanjing, China
| | - Meng Xiao
- grid.49470.3e0000 0001 2331 6153Key Lab of Artificial Micro- and Nano-Structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, China
| | - Zheng Gao
- grid.49470.3e0000 0001 2331 6153Key Lab of Artificial Micro- and Nano-Structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, China
| | - Pengbing Gui
- grid.49470.3e0000 0001 2331 6153Key Lab of Artificial Micro- and Nano-Structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, China
| | - Fang Yao
- grid.49470.3e0000 0001 2331 6153Key Lab of Artificial Micro- and Nano-Structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, China
| | - Kailian Dong
- grid.49470.3e0000 0001 2331 6153Key Lab of Artificial Micro- and Nano-Structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, China
| | - Jiashuai Li
- grid.49470.3e0000 0001 2331 6153Key Lab of Artificial Micro- and Nano-Structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, China
| | - Xuzhi Hu
- grid.49470.3e0000 0001 2331 6153Key Lab of Artificial Micro- and Nano-Structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, China
| | - Hengjiang Cong
- grid.49470.3e0000 0001 2331 6153College of Chemistry & Molecular Sciences, Wuhan University, Wuhan, China
| | - Shuangfeng Jia
- grid.49470.3e0000 0001 2331 6153Key Lab of Artificial Micro- and Nano-Structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, China
| | - Ti Wang
- grid.49470.3e0000 0001 2331 6153Key Lab of Artificial Micro- and Nano-Structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, China
| | - Jianbo Wang
- grid.49470.3e0000 0001 2331 6153Key Lab of Artificial Micro- and Nano-Structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, China
| | - Gang Li
- grid.16890.360000 0004 1764 6123Department of Electronic and Information Engineering, The Hong Kong Polytechnic University, Hong Kong, China
| | - Wei Huang
- grid.412022.70000 0000 9389 5210Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (Nanjing Tech), Nanjing, China ,grid.440588.50000 0001 0307 1240Institute of Flexible Electronics, Northwestern Polytechnical University (NPU), Xi’an, China
| | - Weijun Ke
- grid.49470.3e0000 0001 2331 6153Key Lab of Artificial Micro- and Nano-Structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, China
| | - Jianpu Wang
- grid.412022.70000 0000 9389 5210Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (Nanjing Tech), Nanjing, China
| | - Guojia Fang
- grid.49470.3e0000 0001 2331 6153Key Lab of Artificial Micro- and Nano-Structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, China
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38
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Liang X, Liu Z, Zhang J, Chen H, Gu Q, Zhang W, Shen C, Xiao Z, Wang Y, Liao J, Wen X, Xie J, Yao L, Cai W, Mo Y, Qing J, Su SJ, Hou L. Promoting Energy Transfer Between Quasi-2D Perovskite Layers Toward Highly Efficient Red Light-Emitting Diodes. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2204638. [PMID: 36310146 DOI: 10.1002/smll.202204638] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 09/14/2022] [Indexed: 06/16/2023]
Abstract
Although tremendous progress has recently been made in quasi-2D perovskite light-emitting diodes (PeLEDs), the performance of red PeLEDs emitting at ≈650-660 nm, which have wide prospects for application in photodynamic therapy, is still limited by an inefficient energy transfer process between the quasi-2D perovskite layers. Herein, a symmetric molecule of 3,3'-(9H-fluorene-9,9-diyl)dipropanamide (FDPA) is designed and developed with two functional acylamino groups and incorporated into the quasi-2D perovskites as the additive for achieving high-performance red PeLEDs. It is demonstrated that the agent can simultaneously diminish the van der Waals gaps between individual perovskite layers and passivate uncoordinated Pb2+ related defects at the surface and grain boundaries of the quasi-2D perovskites, which truly results in an efficient energy transfer in the quasi-2D perovskite films. Consequently, the red PeLEDs emitting at 653 nm with a peak external quantum efficiency of 18.5% and a maximum luminance of 2545 cd m-2 are achieved, which is among the best performing red quasi-2D PeLEDs emitting at ≈650-660 nm. This work opens a way to further improve the electroluminescence performance of red PeLEDs.
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Affiliation(s)
- Xiangfei Liang
- Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Siyuan Laboratory, Department of Physics, Jinan University, 510632, Guangzhou, China
| | - Zhe Liu
- State Key Laboratory of Luminescent Materials and Devices and Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, 510640, Guangzhou, China
| | - Jibin Zhang
- Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Siyuan Laboratory, Department of Physics, Jinan University, 510632, Guangzhou, China
- Key Laboratory of Materials Physics of Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Daxue Road 75, 450052, Zhengzhou, China
| | - Hongting Chen
- Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Siyuan Laboratory, Department of Physics, Jinan University, 510632, Guangzhou, China
| | - Qing Gu
- State Key Laboratory of Luminescent Materials and Devices and Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, 510640, Guangzhou, China
| | - Wei Zhang
- School of Physics and Materials Science, Guangzhou University, 510006, Guangzhou, China
| | - Chao Shen
- Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Siyuan Laboratory, Department of Physics, Jinan University, 510632, Guangzhou, China
| | - Zijie Xiao
- School of Physics and Materials Science, Guangzhou University, 510006, Guangzhou, China
| | - Yufei Wang
- Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Siyuan Laboratory, Department of Physics, Jinan University, 510632, Guangzhou, China
| | - Jihai Liao
- Department of Physics, South China University of Technology, 510640, Guangzhou, China
| | - Xuemiao Wen
- Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Siyuan Laboratory, Department of Physics, Jinan University, 510632, Guangzhou, China
| | - Jianing Xie
- Guangdong-Hong Kong-Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology, School of Physics and Optoelectronic Engineering, Foshan University, 528225, Foshan, China
| | - Lijun Yao
- Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Siyuan Laboratory, Department of Physics, Jinan University, 510632, Guangzhou, China
| | - Wanzhu Cai
- Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Siyuan Laboratory, Department of Physics, Jinan University, 510632, Guangzhou, China
| | - Yueqi Mo
- State Key Laboratory of Luminescent Materials and Devices and Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, 510640, Guangzhou, China
| | - Jian Qing
- Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Siyuan Laboratory, Department of Physics, Jinan University, 510632, Guangzhou, China
| | - Shi-Jian Su
- State Key Laboratory of Luminescent Materials and Devices and Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, 510640, Guangzhou, China
| | - Lintao Hou
- Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Siyuan Laboratory, Department of Physics, Jinan University, 510632, Guangzhou, China
- Key Laboratory of Materials Physics of Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Daxue Road 75, 450052, Zhengzhou, China
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39
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High-quality luminescent CsPbBr3 perovskite nanocrystals prepared by a facile two-phase method. Chem Phys Lett 2022. [DOI: 10.1016/j.cplett.2022.140262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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40
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Silica-coated CsPbBr3 nanocrystals with high stability for bright white-emitting displays. J SOLID STATE CHEM 2022. [DOI: 10.1016/j.jssc.2022.123724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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41
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Chen CH, Hsu CH, Ni IC, Lin BH, Wu CI, Kuo CC, Chueh CC. Regulating the phase distribution of quasi-2D perovskites using a three-dimensional cyclic molecule toward improved light-emitting performance. NANOSCALE 2022; 14:17409-17417. [PMID: 36383153 DOI: 10.1039/d2nr04735g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
In this study, a molecule with a three-dimensional (3D) cyclic structure, a cryptand, is demonstrated as an effective additive for the quasi-two-dimensional (quasi-2D) PEA2Csn-1PbnBr3n+1 (n = 3, herein) to improve its light-emitting performance. The cryptand can effectively regulate the phase distribution of the quasi-2D perovskite through its intense interaction with PbBr2, benefitting from its cage-like structure that can better capture the Pb2+ ions. Due to the inhibited growth of the low-n phases, a much-concentrated phase distribution is achieved for the cryptand-containing films. Moreover, its constituent O/N atoms can passivate the uncoordinated Pb2+ ions to improve the film quality. Such a synergistic effect thereby facilitates the charge/energy transfer among the multiple phases and reduces the non-radiative recombination. As a result, the quasi-2D perovskite light-emitting diode (PeLED) with the optimized cryptand doping ratio is shown to deliver the highest luminance (Lmax) of 15 532 cd m-2 with a highest external quantum efficiency (EQE) of 4.02%. Compared to the pristine device, Lmax is enhanced by ∼5 times and EQE is enhanced by ∼10 times.
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Affiliation(s)
- Chiung-Han Chen
- Department of Chemical Engineering, National Taiwan, University, Taipei 10617, Taiwan.
- Advanced Research Center for Green Materials Science and Technology, National Taiwan University, Taipei 10617, Taiwan
| | - Chiao-Hsin Hsu
- Institute of Organic and Polymeric Material, National Taipei University of Technology, Taipei 10617, Taiwan.
| | - I-Chih Ni
- Graduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei 10617, Taiwan
| | - Bi-Hsuan Lin
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - Chih-I Wu
- Graduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei 10617, Taiwan
| | - Chi-Ching Kuo
- Institute of Organic and Polymeric Material, National Taipei University of Technology, Taipei 10617, Taiwan.
| | - Chu-Chen Chueh
- Department of Chemical Engineering, National Taiwan, University, Taipei 10617, Taiwan.
- Advanced Research Center for Green Materials Science and Technology, National Taiwan University, Taipei 10617, Taiwan
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42
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Gao Z, Zhou H, Dong K, Wang C, Wei J, Li Z, Li J, Liu Y, Zhao J, Fang G. Defect Passivation on Lead-Free CsSnI 3 Perovskite Nanowires Enables High-Performance Photodetectors with Ultra-High Stability. NANO-MICRO LETTERS 2022; 14:215. [PMID: 36342568 PMCID: PMC9640512 DOI: 10.1007/s40820-022-00964-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2022] [Accepted: 10/18/2022] [Indexed: 05/09/2023]
Abstract
In recent years, Pb-free CsSnI3 perovskite materials with excellent photoelectric properties as well as low toxicity are attracting much attention in photoelectric devices. However, deep level defects in CsSnI3, such as high density of tin vacancies, structural deformation of SnI6- octahedra and oxidation of Sn2+ states, are the major challenge to achieve high-performance CsSnI3-based photoelectric devices with good stability. In this work, defect passivation method is adopted to solve the above issues, and the ultra-stable and high-performance CsSnI3 nanowires (NWs) photodetectors (PDs) are fabricated via incorporating 1-butyl-2,3-dimethylimidazolium chloride salt (BMIMCl) into perovskites. Through materials analysis and theoretical calculations, BMIM+ ions can effectively passivate the Sn-related defects and reduce the dark current of CsSnI3 NW PDs. To further reduce the dark current of the devices, the polymethyl methacrylate is introduced, and finally, the dual passivated CsSnI3 NWPDs show ultra-high performance with an ultra-low dark current of 2 × 10-11 A, a responsivity of up to 0.237 A W-1, a high detectivity of 1.18 × 1012 Jones and a linear dynamic range of 180 dB. Furthermore, the unpackaged devices exhibit ultra-high stability in device performance after 60 days of storage in air (25 °C, 50% humidity), with the device performance remaining above 90%.
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Affiliation(s)
- Zheng Gao
- International School of Microelectronics, Dongguan University of Technology, Dongguan, 523808, Guangdong, People's Republic of China
- Key Lab of Artificial Micro- and Nano-Structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, 430072, People's Republic of China
- Faculty of Physics and Electronic Science, Hubei University, Wuhan, 430062, People's Republic of China
| | - Hai Zhou
- International School of Microelectronics, Dongguan University of Technology, Dongguan, 523808, Guangdong, People's Republic of China.
| | - Kailian Dong
- Key Lab of Artificial Micro- and Nano-Structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, 430072, People's Republic of China
| | - Chen Wang
- Key Lab of Artificial Micro- and Nano-Structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, 430072, People's Republic of China
| | - Jiayun Wei
- Faculty of Physics and Electronic Science, Hubei University, Wuhan, 430062, People's Republic of China
| | - Zhe Li
- Key Lab of Artificial Micro- and Nano-Structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, 430072, People's Republic of China
| | - Jiashuai Li
- Key Lab of Artificial Micro- and Nano-Structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, 430072, People's Republic of China
| | - Yongjie Liu
- Key Lab of Artificial Micro- and Nano-Structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, 430072, People's Republic of China
| | - Jiang Zhao
- Faculty of Physics and Electronic Science, Hubei University, Wuhan, 430062, People's Republic of China.
| | - Guojia Fang
- Key Lab of Artificial Micro- and Nano-Structures of Ministry of Education of China, School of Physics and Technology, Wuhan University, Wuhan, 430072, People's Republic of China.
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43
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Dong J, Lu F, Han D, Wang J, Zang Z, Kong L, Zhang Y, Ma X, Zhou J, Ji H, Yang X, Wang N. Deep‐Blue Electroluminescence of Perovskites with Reduced Dimensionality Achieved by Manipulating Adsorption‐Energy Differences. Angew Chem Int Ed Engl 2022; 61:e202210322. [DOI: 10.1002/anie.202210322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Indexed: 11/06/2022]
Affiliation(s)
- Jianchao Dong
- Key Laboratory of Physics and Technology for Advanced Batteries of Ministry of Education College of Physics Jilin University Changchun 130012 P. R. China
| | - Feifei Lu
- Key Laboratory of Physics and Technology for Advanced Batteries of Ministry of Education College of Physics Jilin University Changchun 130012 P. R. China
| | - Dongyuan Han
- Key Laboratory of Physics and Technology for Advanced Batteries of Ministry of Education College of Physics Jilin University Changchun 130012 P. R. China
| | - Jie Wang
- Key Laboratory of Physics and Technology for Advanced Batteries of Ministry of Education College of Physics Jilin University Changchun 130012 P. R. China
| | - Ziang Zang
- Key Laboratory of Physics and Technology for Advanced Batteries of Ministry of Education College of Physics Jilin University Changchun 130012 P. R. China
| | - Lingmei Kong
- Key Laboratory of Advanced Display and System Applications of Ministry of Education Shanghai University 149 Yanchang Road Shanghai 200072 P. R. China
| | - Yu Zhang
- Key Laboratory of Physics and Technology for Advanced Batteries of Ministry of Education College of Physics Jilin University Changchun 130012 P. R. China
| | - Xue Ma
- Key Laboratory of Physics and Technology for Advanced Batteries of Ministry of Education College of Physics Jilin University Changchun 130012 P. R. China
| | - Jianheng Zhou
- Key Laboratory of Physics and Technology for Advanced Batteries of Ministry of Education College of Physics Jilin University Changchun 130012 P. R. China
| | - Huiyu Ji
- Key Laboratory of Physics and Technology for Advanced Batteries of Ministry of Education College of Physics Jilin University Changchun 130012 P. R. China
| | - Xuyong Yang
- Key Laboratory of Advanced Display and System Applications of Ministry of Education Shanghai University 149 Yanchang Road Shanghai 200072 P. R. China
| | - Ning Wang
- Key Laboratory of Physics and Technology for Advanced Batteries of Ministry of Education College of Physics Jilin University Changchun 130012 P. R. China
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44
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Kong L, Zhang X, Zhang C, Wang L, Wang S, Cao F, Zhao D, Rogach AL, Yang X. Stability of Perovskite Light-Emitting Diodes: Existing Issues and Mitigation Strategies Related to Both Material and Device Aspects. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2205217. [PMID: 35921550 DOI: 10.1002/adma.202205217] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 07/12/2022] [Indexed: 06/15/2023]
Abstract
Metal halide perovskites combine excellent electronic and optical properties, such as defect tolerance and high photoluminescence efficiency, with the benefits of low-cost, large-area, solution-based processing. Composition- and dimension-tunable properties of perovskites have already been utilized in bright and efficient light-emitting diodes (LEDs). At the same time, there are still great challenges ahead to achieving operational and spectral stability of these devices. In this review, the origins of instability of perovskite materials, and reasons for their degradation in LEDs are considered. Then, strategies for improving the stability of perovskite materials are reviewed, such as compositional engineering, dimensionality control, defect passivation, suitable encapsulation matrices, and fabrication of core/shell perovskite nanocrystals. For improvement of the operational stability of perovskite LEDs, the use of inorganic charge-transport layers, optimization of charge balance, and proper thermal management are considered. The review is concluded with a detailed account of the current challenges and a perspective on the key approaches and opportunities on how to reach the goal of stable, bright, and efficient perovskite LEDs.
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Affiliation(s)
- Lingmei Kong
- Key Laboratory of Advanced Display and System Applications of Ministry of Education, Shanghai University, Shanghai, 200072, P. R. China
| | - Xiaoyu Zhang
- College of Materials Science and Engineering, Jilin University, Changchun, 130012, P. R. China
| | - Chengxi Zhang
- Key Laboratory of Advanced Display and System Applications of Ministry of Education, Shanghai University, Shanghai, 200072, P. R. China
| | - Lin Wang
- Key Laboratory of Advanced Display and System Applications of Ministry of Education, Shanghai University, Shanghai, 200072, P. R. China
| | - Sheng Wang
- Key Laboratory of Advanced Display and System Applications of Ministry of Education, Shanghai University, Shanghai, 200072, P. R. China
| | - Fan Cao
- Key Laboratory of Advanced Display and System Applications of Ministry of Education, Shanghai University, Shanghai, 200072, P. R. China
| | - Dewei Zhao
- College of Materials Science and Engineering, Engineering Research Center of Alternative Energy Materials & Devices (MoE), Sichuan University, Chengdu, 610065, P. R. China
| | - Andrey L Rogach
- Department of Materials Science and Engineering, and Centre for Functional Photonics (CFP), City University of Hong Kong, Hong Kong SAR, 999077, P. R. China
| | - Xuyong Yang
- Key Laboratory of Advanced Display and System Applications of Ministry of Education, Shanghai University, Shanghai, 200072, P. R. China
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45
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Ma Z, Ji X, Wang M, Zhang F, Liu Z, Yang D, Jia M, Chen X, Wu D, Zhang Y, Li X, Shi Z, Shan C. Carbazole-Containing Polymer-Assisted Trap Passivation and Hole-Injection Promotion for Efficient and Stable CsCu 2 I 3 -Based Yellow LEDs. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2202408. [PMID: 35780486 PMCID: PMC9507358 DOI: 10.1002/advs.202202408] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Indexed: 05/05/2023]
Abstract
Perovskite light-emitting diodes (LEDs) are emerging light sources for next-generation lighting and display technologies; however, their development is greatly plagued by difficulty in achieving yellow electroluminescence, environmental instability, and lead toxicity. Copper halide CsCu2 I3 with intrinsic yellow emission emerges as a highly promising candidate for eco-friendly LEDs, but the electroluminescent performance is limited by defect-related nonradiative losses and inefficient charge transport/injection. To solve these issues, a hole-transporting poly(9-vinlycarbazole) (PVK)-incorporated engineering into CsCu2 I3 emitter is proposed. PVK with carbazole groups is permeated at the grain boundaries of CsCu2 I3 films by interacting with the uncoordinated Cu+ , reducing the CuCs and CuI antisite defects to increase the radiative recombination and enhancing the hole mobility to balance the charge transport/injection, resulting in substantially enhanced device performances. Eventually, the yellow LEDs exhibit an 8.5-fold enhancement of external quantum efficiency, and the half-lifetime reaches 14.6 h, representing the most stable yellow LEDs based on perovskite systems reported so far.
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Affiliation(s)
- Zhuangzhuang Ma
- Key Laboratory of Materials Physics of Ministry of EducationSchool of Physics and MicroelectronicsZhengzhou UniversityDaxue Road 75Zhengzhou450052China
| | - Xinzhen Ji
- Key Laboratory of Materials Physics of Ministry of EducationSchool of Physics and MicroelectronicsZhengzhou UniversityDaxue Road 75Zhengzhou450052China
| | - Meng Wang
- Key Laboratory of Materials Physics of Ministry of EducationSchool of Physics and MicroelectronicsZhengzhou UniversityDaxue Road 75Zhengzhou450052China
| | - Fei Zhang
- Key Laboratory of Materials Physics of Ministry of EducationSchool of Physics and MicroelectronicsZhengzhou UniversityDaxue Road 75Zhengzhou450052China
| | - Zibin Liu
- Key Laboratory of Materials Physics of Ministry of EducationSchool of Physics and MicroelectronicsZhengzhou UniversityDaxue Road 75Zhengzhou450052China
| | - Dongwen Yang
- Key Laboratory of Materials Physics of Ministry of EducationSchool of Physics and MicroelectronicsZhengzhou UniversityDaxue Road 75Zhengzhou450052China
| | - Mochen Jia
- Key Laboratory of Materials Physics of Ministry of EducationSchool of Physics and MicroelectronicsZhengzhou UniversityDaxue Road 75Zhengzhou450052China
| | - Xu Chen
- Key Laboratory of Materials Physics of Ministry of EducationSchool of Physics and MicroelectronicsZhengzhou UniversityDaxue Road 75Zhengzhou450052China
| | - Di Wu
- Key Laboratory of Materials Physics of Ministry of EducationSchool of Physics and MicroelectronicsZhengzhou UniversityDaxue Road 75Zhengzhou450052China
| | - Yu Zhang
- State Key Laboratory on Integrated OptoelectronicsCollege of Electronic Science and EngineeringJilin UniversityQianjin Street 2699Changchun130012China
| | - Xinjian Li
- Key Laboratory of Materials Physics of Ministry of EducationSchool of Physics and MicroelectronicsZhengzhou UniversityDaxue Road 75Zhengzhou450052China
| | - Zhifeng Shi
- Key Laboratory of Materials Physics of Ministry of EducationSchool of Physics and MicroelectronicsZhengzhou UniversityDaxue Road 75Zhengzhou450052China
| | - Chongxin Shan
- Key Laboratory of Materials Physics of Ministry of EducationSchool of Physics and MicroelectronicsZhengzhou UniversityDaxue Road 75Zhengzhou450052China
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46
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Jiang J, Chu Z, Yin Z, Li J, Yang Y, Chen J, Wu J, You J, Zhang X. Red Perovskite Light-Emitting Diodes with Efficiency Exceeding 25% Realized by Co-Spacer Cations. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2204460. [PMID: 35855612 DOI: 10.1002/adma.202204460] [Citation(s) in RCA: 43] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 06/29/2022] [Indexed: 06/15/2023]
Abstract
Perovskite light-emitting diodes (PeLEDs) have received great attention in recent years due to their narrow emission bandwidth and tunable emission spectrum. Efficient red emission is one of most important parts for lighting and displays. Quasi-2D perovskites can deliver high emission efficiency due to the strong carrier confinement, while the external quantum efficiencies (EQE) of red quasi-2D PeLEDs are inefficient at present, which is due to the complex distribution of different n-value phases in quasi-2D perovskite films. In this work, the phase distribution of the quasi-2D perovskite is finely controlled by mixing two different large organic cations, which effectively reduces the amount of smaller n-index phases, meanwhile the passivation of lead and halide defects in perovskite films is realized. Accordingly, the PeLEDs show 25.8% EQE and 1300 cd m-2 maximum brightness at 680 nm, which exhibits the highest performance for red PeLEDs up to now.
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Affiliation(s)
- Ji Jiang
- Key Lab of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, P. R. China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Zema Chu
- Key Lab of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, P. R. China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Zhigang Yin
- Key Lab of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, P. R. China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Jingzhen Li
- Key Lab of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, P. R. China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Yingguo Yang
- Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201204, P. R. China
| | - Jingren Chen
- Key Lab of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, P. R. China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Jinliang Wu
- Key Lab of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, P. R. China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Jingbi You
- Key Lab of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, P. R. China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Xingwang Zhang
- Key Lab of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, P. R. China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
- Joint Lab of Digital Optical Chip, Wuyi University, Jiangmen, 529020, P. R. China
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47
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Dong J, Lu F, Han D, Wang J, Zang Z, Kong L, Zhang Y, Ma X, Zhou J, Ji H, Yang X, Wang N. Deep‐Blue Electroluminescence of Perovskites with Reduced Dimensionality Achieved by Manipulating Adsorption‐Energy Differences. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202210322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | | | | | | | | | | | | | - Xue Ma
- Jilin University Physics CHINA
| | | | | | | | - Ning Wang
- Jilin University College of physics Qianjin Street 130022 Changchun CHINA
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48
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Ye D, Li Z, Chen W, Ighodalo KO, Xiao P, Chen T, Xiao Z. Stable Yellow Light-Emitting Diodes Based on Quasi-Two-Dimensional Perovskites. ACS APPLIED MATERIALS & INTERFACES 2022; 14:34918-34925. [PMID: 35868005 DOI: 10.1021/acsami.2c07314] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Perovskite light-emitting diodes (PeLEDs) show great potential in display and lighting because of their tunable wavelength, narrow emission bandwidths, and high color purity. Currently, the external quantum efficiency (EQE) of red and green PeLEDs has reached >23%. However, yellow PeLEDs are still rarely reported because of phase separation in mixed-halide perovskites and the coexistence of multiple phases in quasi-two-dimensional (quasi-2D) perovskites L2An-1BnX3n+1 (n = 1, 2, 3, ...), where L is a bulky organoammonium ligand. Here, we fabricate stable yellow PeLEDs by manipulating the phase distribution and incorporating rubidium cations (Rb+) in quasi-2D perovskites. The transient absorption results confirm that alkylammonium ligand butyl ammonium (BA) has a narrower phase distribution than phenylethyl ammonium (PEA) in the quasi-2D perovskites, resulting in a more blue-shifted emission peak. We further incorporate a proper molar ratio of Rb+ in the (BA)2CsPb2I7 perovskite to blue-shift the emission peak to the yellow range. Finally, the yellow PeLEDs exhibit an EQE of 3.5%, and the stable emission peak is located at 595 nm. Our work provides a useful approach for the fabrication of highly efficient and stable yellow PeLEDs.
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Affiliation(s)
- Dan Ye
- Department of Physics, CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Zhijian Li
- Department of Physics, CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Wenjing Chen
- Department of Physics, CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Kester O Ighodalo
- Department of Physics, CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Peng Xiao
- Department of Materials Science and Engineering, CAS Key Laboratory of Materials for Energy Conversion, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Tao Chen
- Department of Materials Science and Engineering, CAS Key Laboratory of Materials for Energy Conversion, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Zhengguo Xiao
- Department of Physics, CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
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49
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Xue X, Li M, Liu Z, Wang C, Xu J, Wang S, Zhang H, Zhong H, Ji W. Quantum dots enhanced stability of in-situ fabricated perovskite nanocrystals based light-emitting diodes: Electrical field distribution effects. FUNDAMENTAL RESEARCH 2022. [DOI: 10.1016/j.fmre.2022.08.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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50
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Li Z, Zhang H, Li J, Cao K, Chen Z, Xu L, Ding X, Yu B, Tang Y, Ou J, Kuo H, Yip H. Perovskite-Gallium Nitride Tandem Light-Emitting Diodes with Improved Luminance and Color Tunability. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2201844. [PMID: 35596610 PMCID: PMC9353454 DOI: 10.1002/advs.202201844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 04/21/2022] [Indexed: 06/15/2023]
Abstract
Tandem structures with different subpixels are promising for perovskite-based multicolor electroluminescence (EL) devices in ultra-high-resolution full-color displays; however, realizing excellent luminance- and color-independent tunability considering the low brightness and stability of blue perovskite light-emitting diodes (PeLEDs) remains a challenge. Herein, a bright and stable blue gallium nitride (GaN) LED is utilized for vertical integration with a green MAPbBr3 PeLED, successfully achieving a Pe-GaN tandem LED with independently tunable luminance and color. The electronic and photonic co-excitation (EPCE) effect is found to suppress the radiative recombination and current injection of PeLEDs, leading to degraded luminance and current efficiency under direct current modulation. Accordingly, the pulse-width modulation is introduced to the tandem device with a negligible EPCE effect, and the average hybrid current efficiency is significantly improved by 139.5%, finally achieving a record tunable luminance (average tuning range of 16631 cd m-2 at an arbitrary color from blue to green) for perovskite-based multi-color LEDs. The reported excellent independent tunability can be the starting point for perovskite-based multicolor EL devices, enabling the combination with matured semiconductor technologies to facilitate their commercialization in advanced display applications with ultra-high resolution.
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Affiliation(s)
- Zong‐Tao Li
- National and Local Joint Engineering Research Center of Semiconductor Display and Optical Communication DevicesSouth China University of TechnologyGuangzhou510641China
| | - Hong‐Wei Zhang
- National and Local Joint Engineering Research Center of Semiconductor Display and Optical Communication DevicesSouth China University of TechnologyGuangzhou510641China
| | - Jia‐Sheng Li
- National and Local Joint Engineering Research Center of Semiconductor Display and Optical Communication DevicesSouth China University of TechnologyGuangzhou510641China
| | - Kai Cao
- National and Local Joint Engineering Research Center of Semiconductor Display and Optical Communication DevicesSouth China University of TechnologyGuangzhou510641China
| | - Ziming Chen
- Department of ChemistryImperial College LondonLondonW12 0BZUnited Kingdom
| | - Liang Xu
- R&D CenterFoshan Nationstar Semiconductor Technology Co. Ltd.Foshan528000China
| | - Xin‐Rui Ding
- National and Local Joint Engineering Research Center of Semiconductor Display and Optical Communication DevicesSouth China University of TechnologyGuangzhou510641China
| | - Bin‐Hai Yu
- National and Local Joint Engineering Research Center of Semiconductor Display and Optical Communication DevicesSouth China University of TechnologyGuangzhou510641China
| | - Yong Tang
- National and Local Joint Engineering Research Center of Semiconductor Display and Optical Communication DevicesSouth China University of TechnologyGuangzhou510641China
| | - Jian‐Zhen Ou
- School of EngineeringRMIT University MelbourneVictoria3000Australia
| | - Hao‐Chung Kuo
- Department of Photonics and Institute of Electro‐Optical Engineering College of Electrical and Computer EngineeringNational Chiao Tung UniversityHsinchu30010Taiwan, China
- Semiconductor Research CenterHon Hai Research InstituteNew Taipei CityTaiwan236China
| | - Hin‐Lap Yip
- Department of Materials Science and EngineeringCity University of Hong KongHong Kong999077China
- School of Energy and EnvironmentCity University of Hong KongHong Kong999077China
- Hong Kong Institute for Clean EnergyCity University of Hong KongHong Kong999077China
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