Mixed halide perovskites for spectrally stable and high-efficiency blue light-emitting diodes
Authors
Yi, Ziyue
Luo, Xiyu
Lin, Weihua
Zhang, Zeyu
Zhang, Rui
Zheng, Guanhaojie
Teng, Pengpeng
Duan, Lian
Lu, Yue
Zheng, Kaibo
Publication Date
2021-01-13Journal Title
Nature Communications
Publisher
Nature Publishing Group UK
Volume
12
Issue
1
Language
en
Type
Article
This Version
VoR
Metadata
Show full item recordCitation
Karlsson, M., Yi, Z., Reichert, S., Luo, X., Lin, W., Zhang, Z., Bao, C., et al. (2021). Mixed halide perovskites for spectrally stable and high-efficiency blue light-emitting diodes. Nature Communications, 12 (1) https://doi.org/10.1038/s41467-020-20582-6
Description
Funder: ERC Starting Grant (No. 717026)
Abstract
Abstract: Bright and efficient blue emission is key to further development of metal halide perovskite light-emitting diodes. Although modifying bromide/chloride composition is straightforward to achieve blue emission, practical implementation of this strategy has been challenging due to poor colour stability and severe photoluminescence quenching. Both detrimental effects become increasingly prominent in perovskites with the high chloride content needed to produce blue emission. Here, we solve these critical challenges in mixed halide perovskites and demonstrate spectrally stable blue perovskite light-emitting diodes over a wide range of emission wavelengths from 490 to 451 nanometres. The emission colour is directly tuned by modifying the halide composition. Particularly, our blue and deep-blue light-emitting diodes based on three-dimensional perovskites show high EQE values of 11.0% and 5.5% with emission peaks at 477 and 467 nm, respectively. These achievements are enabled by a vapour-assisted crystallization technique, which largely mitigates local compositional heterogeneity and ion migration.
Keywords
Article, /639/301/1005/1007, /639/301/1019/1020, /120, /128, article
Identifiers
s41467-020-20582-6, 20582
External DOI: https://doi.org/10.1038/s41467-020-20582-6
This record's URL: https://www.repository.cam.ac.uk/handle/1810/316148
Rights
Attribution 4.0 International (CC BY 4.0)
Licence URL: https://creativecommons.org/licenses/by/4.0/
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