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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...

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Autores principales: 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
Formato: Online Artículo Texto
Lenguaje:English
Publicado: AAAS 2020
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.
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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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