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Halide Homogenization for High-Performance Blue Perovskite Electroluminescence
Metal halide perovskite light-emitting diodes (LEDs) have achieved great progress in recent years. However, bright and spectrally stable blue perovskite LED remains a significant challenge. Three-dimensional mixed-halide perovskites have potential to achieve high brightness electroluminescence, but...
Autores principales: | , , , , , , , , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
AAAS
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7877380/ https://www.ncbi.nlm.nih.gov/pubmed/33623912 http://dx.doi.org/10.34133/2020/9017871 |
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author | Cheng, Lu Yi, Chang Tong, Yunfang Zhu, Lin Kusch, Gunnar Wang, Xiaoyu Wang, Xinjiang Jiang, Tao Zhang, Hao Zhang, Ju Xue, Chen Chen, Hong Xu, Wenjie Liu, Dawei Oliver, Rachel A. Friend, Richard H. Zhang, Lijun Wang, Nana Huang, Wei Wang, Jianpu |
author_facet | Cheng, Lu Yi, Chang Tong, Yunfang Zhu, Lin Kusch, Gunnar Wang, Xiaoyu Wang, Xinjiang Jiang, Tao Zhang, Hao Zhang, Ju Xue, Chen Chen, Hong Xu, Wenjie Liu, Dawei Oliver, Rachel A. Friend, Richard H. Zhang, Lijun Wang, Nana Huang, Wei Wang, Jianpu |
author_sort | Cheng, Lu |
collection | PubMed |
description | Metal halide perovskite light-emitting diodes (LEDs) have achieved great progress in recent years. However, bright and spectrally stable blue perovskite LED remains a significant challenge. Three-dimensional mixed-halide perovskites have potential to achieve high brightness electroluminescence, but their emission spectra are unstable as a result of halide phase separation. Here, we reveal that there is already heterogeneous distribution of halides in the as-deposited perovskite films, which can trace back to the nonuniform mixture of halides in the precursors. By simply introducing cationic surfactants to improve the homogeneity of the halides in the precursor solution, we can overcome the phase segregation issue and obtain spectrally stable single-phase blue-emitting perovskites. We demonstrate efficient blue perovskite LEDs with high brightness, e.g., luminous efficacy of 4.7, 2.9, and 0.4 lm W(−1) and luminance of over 37,000, 9,300, and 1,300 cd m(−2) for sky blue, blue, and deep blue with Commission Internationale de l'Eclairage (CIE) coordinates of (0.068, 0.268), (0.091, 0.165), and (0.129, 0.061), respectively, suggesting real promise of perovskites for LED applications. |
format | Online Article Text |
id | pubmed-7877380 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | AAAS |
record_format | MEDLINE/PubMed |
spelling | pubmed-78773802021-02-22 Halide Homogenization for High-Performance Blue Perovskite Electroluminescence Cheng, Lu Yi, Chang Tong, Yunfang Zhu, Lin Kusch, Gunnar Wang, Xiaoyu Wang, Xinjiang Jiang, Tao Zhang, Hao Zhang, Ju Xue, Chen Chen, Hong Xu, Wenjie Liu, Dawei Oliver, Rachel A. Friend, Richard H. Zhang, Lijun Wang, Nana Huang, Wei Wang, Jianpu Research (Wash D C) Research Article Metal halide perovskite light-emitting diodes (LEDs) have achieved great progress in recent years. However, bright and spectrally stable blue perovskite LED remains a significant challenge. Three-dimensional mixed-halide perovskites have potential to achieve high brightness electroluminescence, but their emission spectra are unstable as a result of halide phase separation. Here, we reveal that there is already heterogeneous distribution of halides in the as-deposited perovskite films, which can trace back to the nonuniform mixture of halides in the precursors. By simply introducing cationic surfactants to improve the homogeneity of the halides in the precursor solution, we can overcome the phase segregation issue and obtain spectrally stable single-phase blue-emitting perovskites. We demonstrate efficient blue perovskite LEDs with high brightness, e.g., luminous efficacy of 4.7, 2.9, and 0.4 lm W(−1) and luminance of over 37,000, 9,300, and 1,300 cd m(−2) for sky blue, blue, and deep blue with Commission Internationale de l'Eclairage (CIE) coordinates of (0.068, 0.268), (0.091, 0.165), and (0.129, 0.061), respectively, suggesting real promise of perovskites for LED applications. AAAS 2020-12-24 /pmc/articles/PMC7877380/ /pubmed/33623912 http://dx.doi.org/10.34133/2020/9017871 Text en Copyright © 2020 Lu Cheng et al. https://creativecommons.org/licenses/by/4.0/ Exclusive Licensee Science and Technology Review Publishing House. Distributed under a Creative Commons Attribution License (CC BY 4.0). |
spellingShingle | Research Article Cheng, Lu Yi, Chang Tong, Yunfang Zhu, Lin Kusch, Gunnar Wang, Xiaoyu Wang, Xinjiang Jiang, Tao Zhang, Hao Zhang, Ju Xue, Chen Chen, Hong Xu, Wenjie Liu, Dawei Oliver, Rachel A. Friend, Richard H. Zhang, Lijun Wang, Nana Huang, Wei Wang, Jianpu Halide Homogenization for High-Performance Blue Perovskite Electroluminescence |
title | Halide Homogenization for High-Performance Blue Perovskite Electroluminescence |
title_full | Halide Homogenization for High-Performance Blue Perovskite Electroluminescence |
title_fullStr | Halide Homogenization for High-Performance Blue Perovskite Electroluminescence |
title_full_unstemmed | Halide Homogenization for High-Performance Blue Perovskite Electroluminescence |
title_short | Halide Homogenization for High-Performance Blue Perovskite Electroluminescence |
title_sort | halide homogenization for high-performance blue perovskite electroluminescence |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7877380/ https://www.ncbi.nlm.nih.gov/pubmed/33623912 http://dx.doi.org/10.34133/2020/9017871 |
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