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Unveiling the synergistic effect of precursor stoichiometry and interfacial reactions for perovskite light-emitting diodes

Metal halide perovskites are emerging as promising semiconductors for cost-effective and high-performance light-emitting diodes (LEDs). Previous investigations have focused on the optimisation of the emissive perovskite layer, for example, through quantum confinement to enhance the radiative recombi...

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Autores principales: Yuan, Zhongcheng, Miao, Yanfeng, Hu, Zhangjun, Xu, Weidong, Kuang, Chaoyang, Pan, Kang, Liu, Pinlei, Lai, Jingya, Sun, Baoquan, Wang, Jianpu, Bai, Sai, Gao, Feng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6597563/
https://www.ncbi.nlm.nih.gov/pubmed/31249295
http://dx.doi.org/10.1038/s41467-019-10612-3
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author Yuan, Zhongcheng
Miao, Yanfeng
Hu, Zhangjun
Xu, Weidong
Kuang, Chaoyang
Pan, Kang
Liu, Pinlei
Lai, Jingya
Sun, Baoquan
Wang, Jianpu
Bai, Sai
Gao, Feng
author_facet Yuan, Zhongcheng
Miao, Yanfeng
Hu, Zhangjun
Xu, Weidong
Kuang, Chaoyang
Pan, Kang
Liu, Pinlei
Lai, Jingya
Sun, Baoquan
Wang, Jianpu
Bai, Sai
Gao, Feng
author_sort Yuan, Zhongcheng
collection PubMed
description Metal halide perovskites are emerging as promising semiconductors for cost-effective and high-performance light-emitting diodes (LEDs). Previous investigations have focused on the optimisation of the emissive perovskite layer, for example, through quantum confinement to enhance the radiative recombination or through defect passivation to decrease non-radiative recombination. However, an in-depth understanding of how the buried charge transport layers affect the perovskite crystallisation, though of critical importance, is currently missing for perovskite LEDs. Here, we reveal synergistic effect of precursor stoichiometry and interfacial reactions for perovskite LEDs, and establish useful guidelines for rational device optimization. We reveal that efficient deprotonation of the undesirable organic cations by a metal oxide interlayer with a high isoelectric point is critical to promote the transition of intermediate phases to highly emissive perovskite films. Combining our findings with effective defect passivation of the active layer, we achieve high-efficiency perovskite LEDs with a maximum external quantum efficiency of 19.6%.
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spelling pubmed-65975632019-07-01 Unveiling the synergistic effect of precursor stoichiometry and interfacial reactions for perovskite light-emitting diodes Yuan, Zhongcheng Miao, Yanfeng Hu, Zhangjun Xu, Weidong Kuang, Chaoyang Pan, Kang Liu, Pinlei Lai, Jingya Sun, Baoquan Wang, Jianpu Bai, Sai Gao, Feng Nat Commun Article Metal halide perovskites are emerging as promising semiconductors for cost-effective and high-performance light-emitting diodes (LEDs). Previous investigations have focused on the optimisation of the emissive perovskite layer, for example, through quantum confinement to enhance the radiative recombination or through defect passivation to decrease non-radiative recombination. However, an in-depth understanding of how the buried charge transport layers affect the perovskite crystallisation, though of critical importance, is currently missing for perovskite LEDs. Here, we reveal synergistic effect of precursor stoichiometry and interfacial reactions for perovskite LEDs, and establish useful guidelines for rational device optimization. We reveal that efficient deprotonation of the undesirable organic cations by a metal oxide interlayer with a high isoelectric point is critical to promote the transition of intermediate phases to highly emissive perovskite films. Combining our findings with effective defect passivation of the active layer, we achieve high-efficiency perovskite LEDs with a maximum external quantum efficiency of 19.6%. Nature Publishing Group UK 2019-06-27 /pmc/articles/PMC6597563/ /pubmed/31249295 http://dx.doi.org/10.1038/s41467-019-10612-3 Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Yuan, Zhongcheng
Miao, Yanfeng
Hu, Zhangjun
Xu, Weidong
Kuang, Chaoyang
Pan, Kang
Liu, Pinlei
Lai, Jingya
Sun, Baoquan
Wang, Jianpu
Bai, Sai
Gao, Feng
Unveiling the synergistic effect of precursor stoichiometry and interfacial reactions for perovskite light-emitting diodes
title Unveiling the synergistic effect of precursor stoichiometry and interfacial reactions for perovskite light-emitting diodes
title_full Unveiling the synergistic effect of precursor stoichiometry and interfacial reactions for perovskite light-emitting diodes
title_fullStr Unveiling the synergistic effect of precursor stoichiometry and interfacial reactions for perovskite light-emitting diodes
title_full_unstemmed Unveiling the synergistic effect of precursor stoichiometry and interfacial reactions for perovskite light-emitting diodes
title_short Unveiling the synergistic effect of precursor stoichiometry and interfacial reactions for perovskite light-emitting diodes
title_sort unveiling the synergistic effect of precursor stoichiometry and interfacial reactions for perovskite light-emitting diodes
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6597563/
https://www.ncbi.nlm.nih.gov/pubmed/31249295
http://dx.doi.org/10.1038/s41467-019-10612-3
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