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

作　　者：Peifeng Li Jie Wang Hong Chen Hao Zhang Cheng Li Wenjie Xu Renzhi Li Lin Zhu Nana Wang Jianpu Wang 

机构地区：[1]Key Laboratory of Flexible Electronics(KLOFE)&Institute of Advanced Materials(IAM),Nanjing Tech University(NanjingTech),Nanjing 211816,China [2]School of Electronic Science and Engineering,Xiamen University,Xiamen 361005,China [3]Future Display Institute of Xiamen,Xiamen 361005,China

出　　处：《Chinese Chemical Letters》2022年第2期1017-1020,共4页中国化学快报（英文版）

基　　金：financially supported by the Major Research Plan of the National Natural Science Foundation of China (No.91733302);the National Natural Science Foundation of China (Nos.61875084,61922041,61961160733,61974126,51902273);the National Science Fund for Distinguished Young Scholars (No.61725502);the Natural Science Foundation of Jiangsu Province,China (No.BK20180085);the Major Program of Natural Science Research of Jiangsu Higher Education Institutions of China (No.19KJA520004);the Joint Research Funds of the Department of Science & Technology of Shaanxi Province and NPU (No.2020GXLH-Z-024);the Synergetic Innovation Center for Organic Electronics and Information Displays,a part of this research was undertaken on the SAXS/WAXS beamline at the Australian Synchrotron。

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 over6 times of LEDs based on three-dimensional perovskite with the same device structure, representing the record EQE of hole-transport-layer-free perovskite LED.

关 键 词：Perovskite light-emitting diodes Hole-transport-layer-free device Multiple-quantum-well perovskite Green emission 

分 类 号：TB34[一般工业技术—材料科学与工程] TN312.8[电子电信—物理电子学]