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Li D, Bao Y, Wang R, Wang J, Liu Y, Cao L, Deng Y, Xiang H. Efficient and stable blue perovskite light-emitting diodes enabled by the synergistic incorporation of dual additives. NANOSCALE 2025; 17:9541-9551. [PMID: 40130479 DOI: 10.1039/d4nr05355a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/26/2025]
Abstract
Perovskite materials have garnered significant attention in the field of light-emitting diodes (LEDs) due to their low cost, solution processing, straightforward fabrication, tunable emission wavelengths, narrow emission linewidths, and high photoluminescence quantum yield. However, blue perovskite light-emitting diodes (PeLEDs) currently face challenges of low efficiency and poor stability, which hinder their application in full-color display technology. It is understood that the quality of the perovskite film is considered a key factor affecting the performance of PeLEDs. To achieve high-quality perovskite films and high-performance PeLEDs, benzoic acid potassium (BAP) and guanidinium chloride (GACl) were employed as dual additives in the precursor solution of a quasi-two-dimensional perovskite (PEA2Csn-1PbnX3n+1). By utilizing the coordination of BA- from BAP with uncoordinated Pb2+ and the formation of hydrogen bonds between GA+ from GACl and halide ions, the perovskite surface defects are effectively passivated, along with the inhibition of the migration of halide ions. This approach reduces non-radiative recombination and enhances the spectral stability of perovskite films. By fine-tuning the concentrations of BAP and GACl, optimal PeLEDs are achieved at a BAP concentration of 3% and a GACl concentration of 10%, with the spectrum stabilized at 476 nm and a maximum external quantum efficiency (EQEmax) of 4.47%, which is 2.54 times that of the control device (EQEmax of 1.76%). The findings in this study provide a new approach for the fabrication of highly efficient and spectrally stable blue PeLEDs.
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Affiliation(s)
- Dandan Li
- College of Physics and Electronics Engineering, Hengyang Normal University, Hengyang, Hunan 421002, P. R. China.
| | - Yan Bao
- College of Physics and Electronics Engineering, Hengyang Normal University, Hengyang, Hunan 421002, P. R. China.
| | - Run Wang
- 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, Jiangsu 210094, P. R. China.
| | - Jinjiang Wang
- College of Physics and Electronics Engineering, Hengyang Normal University, Hengyang, Hunan 421002, P. R. China.
| | - Yu Liu
- College of Physics and Electronics Engineering, Hengyang Normal University, Hengyang, Hunan 421002, P. R. China.
| | - Lei Cao
- College of Physics and Electronics Engineering, Hengyang Normal University, Hengyang, Hunan 421002, P. R. China.
| | - Yanhong Deng
- College of Physics and Electronics Engineering, Hengyang Normal University, Hengyang, Hunan 421002, P. R. China.
| | - Hengyang Xiang
- 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, Jiangsu 210094, P. R. China.
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Ooi ZY, Jiménez-Solano A, Gałkowski K, Sun Y, Ferrer Orri J, Frohna K, Salway H, Kahmann S, Nie S, Vega G, Kar S, Nowak MP, Maćkowski S, Nyga P, Ducati C, Greenham NC, Lotsch BV, Anaya M, Stranks SD. Strong angular and spectral narrowing of electroluminescence in an integrated Tamm-plasmon-driven halide perovskite LED. Nat Commun 2024; 15:5802. [PMID: 38987248 PMCID: PMC11237071 DOI: 10.1038/s41467-024-49838-1] [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: 04/11/2023] [Accepted: 06/21/2024] [Indexed: 07/12/2024] Open
Abstract
Next-generation light-emitting applications such as displays and optical communications require judicious control over emitted light, including intensity and angular dispersion. To date, this remains a challenge as conventional methods require cumbersome optics. Here, we report highly directional and enhanced electroluminescence from a solution-processed quasi-2-dimensional halide perovskite light-emitting diode by building a device architecture to exploit hybrid plasmonic-photonic Tamm plasmon modes. By exploiting the processing and bandgap tunability of the halide perovskite device layers, we construct the device stack to optimise both optical and charge-injection properties, leading to narrow forward electroluminescence with an angular full-width half-maximum of 36.6° compared with the conventional isotropic control device of 143.9°, and narrow electroluminescence spectral full-width half-maximum of 12.1 nm. The device design is versatile and tunable to work with emission lines covering the visible spectrum with desired directionality, thus providing a promising route to modular, inexpensive, and directional operating light-emitting devices.
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Affiliation(s)
- Zher Ying Ooi
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge, UK
| | - Alberto Jiménez-Solano
- Max Planck Institute for Solid State Research, Heisenbergstrasse 1, 70569, Stuttgart, Germany
- Departamento de Física, Universidad de Córdoba, Edificio Einstein (C2), Campus de Rabanales, 14071, Córdoba, Spain
| | - Krzysztof Gałkowski
- Cavendish Laboratory, University of Cambridge, Cambridge, UK
- Institute of Physics, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University, Toruń, Poland
- Department of Experimental Physics, Faculty of Fundamental Problems of Technology, Wroclaw University of Science and Technology, Wroclaw, Poland
| | - Yuqi Sun
- Cavendish Laboratory, University of Cambridge, Cambridge, UK
| | - Jordi Ferrer Orri
- Cavendish Laboratory, University of Cambridge, Cambridge, UK
- Department of Materials Science and Metallurgy, University of Cambridge, Cambridge, UK
| | - Kyle Frohna
- Cavendish Laboratory, University of Cambridge, Cambridge, UK
| | - Hayden Salway
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge, UK
| | - Simon Kahmann
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge, UK
- Cavendish Laboratory, University of Cambridge, Cambridge, UK
| | - Shenyu Nie
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge, UK
| | - Guadalupe Vega
- Departamento de Física, Universidad de Córdoba, Edificio Einstein (C2), Campus de Rabanales, 14071, Córdoba, Spain
- Departamento Física de la Materia Condensada, Instituto de Ciencia de Materiales de Sevilla, Universidad de Sevilla-CSIC, Calle Américo Vespucio 49, Sevilla, 41012, Spain
| | - Shaoni Kar
- Cavendish Laboratory, University of Cambridge, Cambridge, UK
| | - Michał P Nowak
- Institute of Optoelectronics, Military University of Technology, Warsaw, Poland
| | - Sebastian Maćkowski
- Institute of Physics, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University, Toruń, Poland
| | - Piotr Nyga
- Institute of Optoelectronics, Military University of Technology, Warsaw, Poland
| | - Caterina Ducati
- Department of Materials Science and Metallurgy, University of Cambridge, Cambridge, UK
| | - Neil C Greenham
- Cavendish Laboratory, University of Cambridge, Cambridge, UK
| | - Bettina V Lotsch
- Max Planck Institute for Solid State Research, Heisenbergstrasse 1, 70569, Stuttgart, Germany
- Department of Chemistry, Ludwig-Maximilians-Universität (LMU), Butenandtstrasse 5-13, 81377, Munich, Germany
- e-conversion, Lichtenbergstrasse 4a, 85748, Garching, Germany
| | - Miguel Anaya
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge, UK.
- Departamento Física de la Materia Condensada, Instituto de Ciencia de Materiales de Sevilla, Universidad de Sevilla-CSIC, Calle Américo Vespucio 49, Sevilla, 41012, Spain.
| | - Samuel D Stranks
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge, UK.
- Cavendish Laboratory, University of Cambridge, Cambridge, UK.
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Elattar A, Tsutsumi K, Suzuki H, Nishikawa T, Kyaw AKK, Hayashi Y. Mixed-halide copper-based perovskite R 2Cu(Cl/Br) 4 with different organic cations for reversible thermochromism. NEW J CHEM 2022. [DOI: 10.1039/d2nj04693h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Mechanically exfoliated flakes of mixed-halide Cu-based perovskite crystals, R2Cu(Cl/Br)4, with three alkyl chains exhibit reversible thermochromic behavior with differences in crystal lattice behavior depending on the organic spacer used.
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Affiliation(s)
- Amr Elattar
- Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama 700-8530, Japan
- Department of Chemistry, Faculty of Science, Ain Shams University, 11566 Cairo, Egypt
| | - Kosei Tsutsumi
- Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama 700-8530, Japan
| | - Hiroo Suzuki
- Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama 700-8530, Japan
| | - Takeshi Nishikawa
- Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama 700-8530, Japan
| | - Aung Ko Ko Kyaw
- Department of Electronic and Electrical Engineering, Southern University of Science and Technology, Shenzhen, 518055, P. R. China
| | - Yasuhiko Hayashi
- Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama 700-8530, Japan
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