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

doi:10.1038/s41377-020-0328-6

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

SCHOOL OF FLEXIBLE ELECTRONICS(FUTURE TECHNOLOGIES)|INSTITUTE OF ADVANCED MATERIALS(IAM)

Research output: Contribution to journal › Letter › peer-review

118 Scopus citations

Abstract

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.

Original language	English
Article number	89
Journal	Light: Science and Applications
Volume	9
Issue number	1
DOIs	https://doi.org/10.1038/s41377-020-0328-6
State	Published - 1 Dec 2020

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title = "Microcavity top-emission perovskite light-emitting diodes",

abstract = "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.",

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

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T1 - Microcavity top-emission perovskite light-emitting diodes

AU - Miao, Yanfeng

AU - Cheng, Lu

AU - Zou, Wei

AU - Gu, Lianghui

AU - Zhang, Ju

AU - Guo, Qiang

AU - Peng, Qiming

AU - Xu, Mengmeng

AU - He, Yarong

AU - Zhang, Shuting

AU - Cao, Yu

AU - Li, Renzhi

AU - Wang, Nana

AU - Huang, Wei

AU - Wang, Jianpu

PY - 2020/12/1

Y1 - 2020/12/1

N2 - 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.

AB - 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.

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VL - 9

JO - Light: Science and Applications

JF - Light: Science and Applications

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Microcavity top-emission perovskite light-emitting diodes

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