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Yang F, Dong W, Kang C, Zhu Z, Zeng Q, Zheng W, Zhang X, Yang B. Solvent-Reconstructed Interface That Enhances Light Out-Coupling in Quasi-Two-Dimensional Perovskite Light-Emitting Diodes. NANO LETTERS 2024; 24:7012-7018. [PMID: 38820129 DOI: 10.1021/acs.nanolett.4c01455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2024]
Abstract
Light management is critical to maximizing the external quantum efficiency of perovskite light-emitting diodes (PeLEDs), but strategies for enhancing light out-coupling are typically complex and expensive. Here, using a facile solvent treatment strategy, we create a layer of lithium fluoride (LiF) nanoislands that serve as a template to reconstruct the light-extracting interfaces for PeLEDs. The nanoisland interface rearranges the near-field light distribution in order to maximize the efficiency of internal light extraction. With the proper adjustment of the nanoisland size and distribution, we have achieved an optimal balance between charge injection and light out-coupling, resulting in bright, pure-red quasi-two-dimensional PeLEDs with a 21.8% peak external quantum efficiency.
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Affiliation(s)
- Fan Yang
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, P. R. China
| | - Wei Dong
- Department of Materials Science, Key Laboratory of Mobile Materials MOE, State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun, 130012, P. R. China
| | - Chunyuan Kang
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, P. R. China
| | - Zhicheng Zhu
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, P. R. China
| | - Qingsen Zeng
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, P. R. China
| | - Weitao Zheng
- Department of Materials Science, Key Laboratory of Mobile Materials MOE, State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun, 130012, P. R. China
| | - Xiaoyu Zhang
- Department of Materials Science, Key Laboratory of Mobile Materials MOE, State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun, 130012, P. R. China
| | - Bai Yang
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, P. R. China
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2
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Tien CH, Liu JQ, Chen LC. Post-hot-cast annealing deposition of perovskite films with infused multifunctional organic molecules to enhance the performance of large-area light-emitting devices. RSC Adv 2024; 14:18567-18575. [PMID: 38860259 PMCID: PMC11163951 DOI: 10.1039/d4ra02652g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2024] [Accepted: 05/28/2024] [Indexed: 06/12/2024] Open
Abstract
All-inorganic perovskites show great promise as an emission layer in perovskite light-emitting diodes (PeLEDs) owing to their easy solution processing, low manufacturing cost, and excellent optoelectronic properties. However, there is still an immense performance gap from small-area devices to large-area PeLED devices. The inhomogeneity of large-area high-quality perovskite films inevitably leads to vast defects and electroluminescence performance losses. Herein, a post-hot-cast annealing deposition scheme and the introduction of the multifunctional molecule 2-amino-1,3-propanediol (APDO) were proposed to regulate the crystallization of the perovskite film. As a result, uniform APDO:CsPbBr2.5Cl0.5 perovskite films with high crystallinity and lower defect density were deposited by post-hot-cast annealing. A decent maximum brightness of 2659 cd m-2 was achieved for the large-area cyan PeLEDs with an emitting area of 400 mm2.
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Affiliation(s)
- Ching-Ho Tien
- Department of Electronic Engineering, Ming Chi University of Technology No. 84, Gungjuan Rd. New Taipei City 24301 Taiwan
- Organic Electronics Research Center, Ming Chi University of Technology No. 84, Gungjuan Rd. New Taipei City 24301 Taiwan
| | - Jun-Qing Liu
- Department of Electro-Optical Engineering, National Taipei University of Technology No. 1, Sec. 3, Chung-Hsiao E. Rd. Taipei 10608 Taiwan
| | - Lung-Chien Chen
- Department of Electro-Optical Engineering, National Taipei University of Technology No. 1, Sec. 3, Chung-Hsiao E. Rd. Taipei 10608 Taiwan
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Jiang J, Shi M, Xia Z, Cheng Y, Chu Z, Zhang W, Li J, Yin Z, You J, Zhang X. Efficient pure-red perovskite light-emitting diodes with strong passivation via ultrasmall-sized molecules. SCIENCE ADVANCES 2024; 10:eadn5683. [PMID: 38701203 PMCID: PMC11067999 DOI: 10.1126/sciadv.adn5683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Accepted: 04/02/2024] [Indexed: 05/05/2024]
Abstract
Perovskite light-emitting diodes (PeLEDs) have attracted great attention in recent years; however, the halogen vacancy defects in perovskite notably hamper the development of high-efficiency devices. Previously, large-sized passivation agents have been usually used, while the effect of defect passivation is limited due to the weak bonding or the large space steric hindrance. Here, we predict that the ultrasmall-sized formate (Fa) and acetate (Ac) have more efficient passivation ability because of the stronger binding with the perovskite, as demonstrated by density functional theory calculation. We introduce ultrasmall-sized cesium salts (CsFa/CsAc) into buried interface, which can also diffuse into the bulk, resulting in both buried interface and bulk passivation. In addition, the improved perovskite growth has been found due to the enhanced hydrophily after introducing CsFa/CsAc as additive. According to these advantages, a pure-red PeLED with 24.2% efficiency at 639 nm has been achieved.
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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
| | - Mingming Shi
- 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
| | - Zhengchang Xia
- 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
| | - Yong Cheng
- 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
| | - Wei Zhang
- Key Lab of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, 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
| | - 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
| | - 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
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Ngai KH, Sun X, Zou X, Fan K, Wei Q, Li M, Li S, Lu X, Meng W, Wu B, Zhou G, Long M, Xu J. Charge Injection and Auger Recombination Modulation for Efficient and Stable Quasi-2D Perovskite Light-Emitting Diodes. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2309500. [PMID: 38447143 PMCID: PMC11095209 DOI: 10.1002/advs.202309500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 02/19/2024] [Indexed: 03/08/2024]
Abstract
The inefficient charge transport and large exciton binding energy of quasi-2D perovskites pose challenges to the emission efficiency and roll-off issues for perovskite light-emitting diodes (PeLEDs) despite excellent stability compared to 3D counterparts. Herein, alkyldiammonium cations with different molecular sizes, namely 1,4-butanediamine (BDA), 1,6-hexanediamine (HDA) and 1,8-octanediamine (ODA), are employed into quasi-2D perovskites, to simultaneously modulate the injection efficiency and recombination dynamics. The size increase of the bulky cation leads to increased excitonic recombination and also larger Auger recombination rate. Besides, the larger size assists the formation of randomly distributed 2D perovskite nanoplates, which results in less efficient injection and deteriorates the electroluminescent performance. Moderate exciton binding energy, suppressed 2D phases and balanced carrier injection of HDA-based PeLEDs contribute to a peak external quantum efficiency of 21.9%, among the highest in quasi-2D perovskite based near-infrared devices. Besides, the HDA-PeLED shows an ultralong operational half-lifetime T50 up to 479 h at 20 mA cm‒2, and sustains the initial performance after a record-level 30 000 cycles of ON-OFF switching, attributed to the suppressed migration of iodide anions into adjacent layers and the electrochemical reaction in HDA-PeLEDs. This work provides a potential direction of cation design for efficient and stable quasi-2D-PeLEDs.
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Affiliation(s)
- Kwan Ho Ngai
- South China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou510006China
- Department of Electronic EngineeringThe Chinese University of Hong KongShatinNew Territories999077Hong Kong
| | - Xinwen Sun
- Department of Electronic EngineeringThe Chinese University of Hong KongShatinNew Territories999077Hong Kong
| | - Xinhui Zou
- Department of Physics and William Mong Institute of Nano Science and TechnologyThe Hong Kong University of Science and TechnologyClear Water BayKowloon999077Hong Kong
| | - Kezhou Fan
- Department of Physics and William Mong Institute of Nano Science and TechnologyThe Hong Kong University of Science and TechnologyClear Water BayKowloon999077Hong Kong
| | - Qi Wei
- Department of Applied PhysicsThe Hong Kong Polytechnic UniversityKowloon999077Hong Kong
| | - Mingjie Li
- Department of Applied PhysicsThe Hong Kong Polytechnic UniversityKowloon999077Hong Kong
| | - Shiang Li
- Department of PhysicsThe Chinese University of Hong KongShatinNew Territories999077Hong Kong
| | - Xinhui Lu
- Department of PhysicsThe Chinese University of Hong KongShatinNew Territories999077Hong Kong
| | - Weiwei Meng
- South China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou510006China
| | - Bo Wu
- South China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou510006China
| | - Guofu Zhou
- South China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou510006China
| | - Mingzhu Long
- South China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou510006China
| | - Jianbin Xu
- Department of Electronic EngineeringThe Chinese University of Hong KongShatinNew Territories999077Hong Kong
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Zeng Z, Meng Y, Yang Z, Ye Y, Lin Q, Meng Z, Hong H, Ye S, Cheng Z, Lan Q, Wang J, Chen Y, Zhang H, Bai Y, Jiang X, Liu B, Hong J, Guo T, Li F, Chen Y, Weng Z. Efficient CsPbBr 3 Perovskite Light-Emitting Diodes via Novel Multi-Step Ligand Exchange Strategy Based on Zwitterionic Molecules. ACS APPLIED MATERIALS & INTERFACES 2024; 16:10389-10397. [PMID: 38364294 DOI: 10.1021/acsami.3c17324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/18/2024]
Abstract
Perovskite nanocrystals have absorbed increasing interest, especially in the field of optoelectronics, owing to their unique characteristics, including their tunable luminescence range, robust solution processability, facile synthesis, and so on. However, in practice, due to the inherent instability of the traditional long-chain insulating ligands surrounding perovskite quantum dots (PeQDs), the performance of the as-fabricated QLED is relatively disappointing. Herein, the zwitterion 3-(decyldimethylammonio)propanesulfonate (DLPS) with the capability of double passivating perovskite quantum dots could effectively replace the original long-chain ligand simply through a multistep post-treatment strategy to finally inhibit the formation of defects. It was indicated from theexperimental results that the DLPS, as one type of ligand with the bimolecular ion, was very adavntageous in replacing long-chain ligands and further suppressing the formation of defects. Finally, the perovskite quantum dots with greatly enhanced PLQY as high as 98% were effectively achieved. Additionally, the colloidal stability of the corresponding PeQDs has been significantly enhanced, and a transparent colloidal solution was obtained after 45 days under ambient conditions. Finally, the as-fabricated QLEDs based on the ligand-exchanged PeQDs exhibited a maximum brightness of 9464 cd/m2 and an EQE of 12.17%.
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Affiliation(s)
- Zhiwei Zeng
- National & Local United Engineering Research Center of Flat Panel Display Technology, Fuzhou University, Fuzhou 350108, PR China
| | - Yuhan Meng
- National & Local United Engineering Research Center of Flat Panel Display Technology, Fuzhou University, Fuzhou 350108, PR China
| | - Zunxian Yang
- National & Local United Engineering Research Center of Flat Panel Display Technology, Fuzhou University, Fuzhou 350108, PR China
- Mindu Innovation Laboratory, Fujian Science & Technology Innovation Laboratory For Optoelectronic Information of China, Fuzhou 350108, PR China
| | - Yuliang Ye
- National & Local United Engineering Research Center of Flat Panel Display Technology, Fuzhou University, Fuzhou 350108, PR China
| | - Qiuxiang Lin
- National & Local United Engineering Research Center of Flat Panel Display Technology, Fuzhou University, Fuzhou 350108, PR China
| | - Zongyi Meng
- National & Local United Engineering Research Center of Flat Panel Display Technology, Fuzhou University, Fuzhou 350108, PR China
| | - Hongyi Hong
- National & Local United Engineering Research Center of Flat Panel Display Technology, Fuzhou University, Fuzhou 350108, PR China
| | - Songwei Ye
- National & Local United Engineering Research Center of Flat Panel Display Technology, Fuzhou University, Fuzhou 350108, PR China
| | - Zhiming Cheng
- National & Local United Engineering Research Center of Flat Panel Display Technology, Fuzhou University, Fuzhou 350108, PR China
| | - Qianting Lan
- National & Local United Engineering Research Center of Flat Panel Display Technology, Fuzhou University, Fuzhou 350108, PR China
| | - Jiaxiang Wang
- National & Local United Engineering Research Center of Flat Panel Display Technology, Fuzhou University, Fuzhou 350108, PR China
| | - Ye Chen
- National & Local United Engineering Research Center of Flat Panel Display Technology, Fuzhou University, Fuzhou 350108, PR China
| | - Hui Zhang
- National & Local United Engineering Research Center of Flat Panel Display Technology, Fuzhou University, Fuzhou 350108, PR China
| | - Yuting Bai
- National & Local United Engineering Research Center of Flat Panel Display Technology, Fuzhou University, Fuzhou 350108, PR China
| | - Xudong Jiang
- National & Local United Engineering Research Center of Flat Panel Display Technology, Fuzhou University, Fuzhou 350108, PR China
| | - Benfang Liu
- National & Local United Engineering Research Center of Flat Panel Display Technology, Fuzhou University, Fuzhou 350108, PR China
| | - Jiajie Hong
- National & Local United Engineering Research Center of Flat Panel Display Technology, Fuzhou University, Fuzhou 350108, PR China
| | - Tailiang Guo
- National & Local United Engineering Research Center of Flat Panel Display Technology, Fuzhou University, Fuzhou 350108, PR China
- Mindu Innovation Laboratory, Fujian Science & Technology Innovation Laboratory For Optoelectronic Information of China, Fuzhou 350108, PR China
| | - Fushan Li
- National & Local United Engineering Research Center of Flat Panel Display Technology, Fuzhou University, Fuzhou 350108, PR China
- Mindu Innovation Laboratory, Fujian Science & Technology Innovation Laboratory For Optoelectronic Information of China, Fuzhou 350108, PR China
| | - Yongyi Chen
- Department of Physics, School of Physics and Information Engineering, Fuzhou University, Fuzhou 350108 China
| | - Zhenzhen Weng
- Department of Physics, School of Physics and Information Engineering, Fuzhou University, Fuzhou 350108 China
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Li YH, Xia Y, Zhang Z, Wang B, Jin RJ, Chen CH, Chen J, Wang KL, Xing G, Wang ZK, Liao LS. In Situ Hydrolysis of Phosphate Enabling Sky-Blue Perovskite Light-Emitting Diode with EQE Approaching 16.32. ACS NANO 2024; 18:6513-6522. [PMID: 38345358 DOI: 10.1021/acsnano.3c12131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/28/2024]
Abstract
The performance of blue perovskite light-emitting diodes (PeLEDs) lags behind the green and red counterparts owing to high trap density and undesirable red shift of the electroluminescence spectrum under operation conditions. Organic molecular additives were employed as passivators in previous reports. However, most commonly have limited functions, making it challenging to effectively address both efficiency and stability issues simultaneously. Herein, we reported an innovatively dynamic in situ hydrolysis strategy to modulate quasi-2D sky-blue perovskites by the multifunctional passivator phenyl dichlorophosphate that not only passivated the defects but also underwent in situ hydrolysis reaction to stabilize the emission. Moreover, hydrolysis products were beneficial for low-dimensional phase manipulation. Eventually, we obtained high-performance sky-blue PeLEDs with a maximum external quantum efficiency (EQE) of 16.32% and an exceptional luminance of 5740 cd m-2. More importantly, the emission peak of devices located at 485 nm remained stable under different biases. Our work signified the significant advancement toward realizing future applications of PeLEDs.
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Affiliation(s)
- Yu-Han Li
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, Jiangsu 215123, China
| | - Yu Xia
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, Jiangsu 215123, China
| | - Zhipeng Zhang
- Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Avenida da Universidade, Taipa 999078, Macao SAR, China
| | - Bin Wang
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, Jiangsu 215123, China
| | - Run-Jun Jin
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, Jiangsu 215123, China
| | - Chun-Hao Chen
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, Jiangsu 215123, China
| | - Jing Chen
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, Jiangsu 215123, China
| | - Kai-Li Wang
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, Jiangsu 215123, China
| | - Guichuan Xing
- Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Avenida da Universidade, Taipa 999078, Macao SAR, China
| | - Zhao-Kui Wang
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, Jiangsu 215123, China
| | - Liang-Sheng Liao
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, Jiangsu 215123, China
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Chen J, Tang Z, Zhou Y, Zhang T, Qian L, Xiang C. In-situ solution processed zinc Oxide as electron transport layer for High-performance perovskite Light-emitting diodes. Chem Phys Lett 2023. [DOI: 10.1016/j.cplett.2023.140441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
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