High-Brightness Perovskite Microcrystalline Light-Emitting Diodes

Jingya Lai, Zichao Zhao, Yanfeng Miao, Saixue Wang, Dawei Liu, Zhiyuan Kuang, Lei Xu, Kaichuan Wen, Jie Wang, Lin Zhu, Nana Wang, Dengfeng Peng, Qiming Peng, Jianpu Wang

科研成果: 期刊稿件文章同行评审

8 引用 (Scopus)

摘要

Here a high-brightness perovskite microcrystalline light-emitting diode (LED) is reported, in which the perovskite microcrystals were grown directly on the conductive substrate and a simple metal-insulator-semiconductor structure was adopted. A peak external quantum efficiency of 0.46% was obtained, which is high for perovskite microcrystalline LEDs. Importantly, the maximum luminance of the device reaches 8848.4 cd m-2, indicating an ultrahigh brightness of >1.2 × 106cd m-2for the microcrystals (corresponding to an ultrahigh current density of 80.9 A cm-2), because the light-emitting area of the microcrystals accounts for only ∼0.7% of the device area. In addition, we have studied the degradation of the device at a high current density by in situ microscopic observation and found that a severe Joule heating effect at large injection is the primary problem to be solved to realize electrically pumped perovskite microcrystal lasing.

源语言英语
页(从-至)2963-2968
页数6
期刊Journal of Physical Chemistry Letters
13
13
DOI
出版状态已出版 - 7 4月 2022

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