佩多:嘘
材料科学
钙钛矿(结构)
曲率
光电子学
发光二极管
二极管
量子效率
亮度
图层(电子)
卤化物
纳米技术
光学
化学工程
化学
物理
几何学
无机化学
数学
工程类
作者
Xiankan Zeng,Cheng Yan,Qungui Wang,Jingjing Cao,Xuehai Fu,Shiyu Yang,Yongjian Chen,Lunyao Pan,Wen Li,Weiqing Yang
出处
期刊:Small
[Wiley]
日期:2023-07-25
卷期号:19 (47)
被引量:4
标识
DOI:10.1002/smll.202304411
摘要
The rapidly developed metal halide perovskite light-emitting diodes (PeLEDs) are considered as a promising candidate for next-generation display and illumination, but the unbalanced charge transport is still a hard-treat case to restrict its efficiency and operational stability. Here, a high curvature PEDOT:PSS transport layer is demonstrated via the self-assembly island-like structures by the incorporation of alkali metal salts. Benefiting from the dielectric confinement effect of the high curvature surface, the modified CsPbBr3 -based PeLEDs present a 2.1 times peak external quantum efficiency (EQE) from 6.75% to 14.23% and a 3.3 times half lifetime (T50 ) from 3.96 to 13.01 h. Besides, the PeLEDs show high luminance up to 44834 cd m-2 . Evidently, this work may provide a deep insight into the structure-activity relationship between the micro-structures at the PEDOT:PSS/perovskite interface and the performance of PeLEDs, and crack the codes for ameliorating the performance of PeLEDs via interfacial micro-structured regulation.
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