Microcavity top-emission perovskite light-emitting diodes

Yanfeng Miao, Lu Cheng, Wei Zou, Lianghui Gu, Ju Zhang, Qiang Guo, Qiming Peng, Mengmeng Xu, Yarong He, Shuting Zhang, Yu Cao, Renzhi Li, Nana Wang, Wei Huang, Jianpu Wang

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118 引用 (Scopus)

摘要

Light-emitting diodes (LEDs) based on perovskites show great potential in lighting and display applications. However, although perovskite films with high photoluminescence quantum efficiencies are commonly achieved, the efficiencies of perovskite LEDs are largely limited by the low light out-coupling efficiency. Here, we show that high-efficiency perovskite LEDs with a high external quantum efficiency of 20.2% and an ultrahigh radiant exitance up to 114.9 mW cm−2 can be achieved by employing the microcavity effect to enhance light extraction. The enhanced microcavity effect and light out-coupling efficiency are confirmed by the study of angle-dependent emission profiles. Our results show that both the optical and electrical properties of the device need to be optimized to achieve high-performance perovskite LEDs.

源语言英语
文章编号89
期刊Light: Science and Applications
9
1
DOI
出版状态已出版 - 1 12月 2020

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