Multiple-quantum-well perovskite for hole-transport-layer-free light-emitting diodes

被引：13

作者：

Li, Peifeng ^{[1
,2
]}

Wang, Jie ^{[1
,2
]}

Chen, Hong ^{[1
,2
]}

Zhang, Hao ^{[1
,2
]}

Li, Cheng ^{[3
,4
]}

Xu, Wenjie ^{[1
,2
]}

Li, Renzhi ^{[1
,2
]}

Zhu, Lin ^{[1
,2
]}

Wang, Nana ^{[1
,2
]}

Wang, Jianpu ^{[1
,2
]}

机构：

[1] Nanjing Tech Univ NanjingTech, Key Lab Flexible Elect KLOFE, Nanjing 211816, Peoples R China

[2] Nanjing Tech Univ NanjingTech, Inst Adv Mat IAM, Nanjing 211816, Peoples R China

[3] Xiamen Univ, Sch Elect Sci & Engn, Xiamen 361005, Peoples R China

[4] Future Display Inst Xiamen, Xiamen 361005, Peoples R China

来源：

CHINESE CHEMICAL LETTERS | 2022年 / 33卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Perovskite light-emitting diodes; Hole-transport-layer-free device; Multiple-quantum-well perovskite; Green emission; EFFICIENT; FILMS; DOTS;

D O I：

10.1016/j.cclet.2021.06.084

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We demonstrate hole-transport-layer-free light-emitting diodes (LEDs) based on solution-processed multiple-quantum-well (MQW) perovskite. The MQW perovskite can self-assemble to a unique structure of vertically graded distribution with two-dimensional layered perovskite covered by three-dimensionallike perovskite at top, which can naturally form a barrier of electron transporting to the anode interface, thereby enhancing the charge capture efficiency. This leads to hole-transport-layer-free MQW perovskite LEDs reaching an external quantum efficiency (EQE) of 9.0% with emission peak at 528 nm, which is over 6 times of LEDs based on three-dimensional perovskite with the same device structure, representing the record EQE of hole-transport-layer-free perovskite LED. (C) 2021 Published by Elsevier B.V. on behalf of Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences.

引用

页码：1017 / 1020

页数：4

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