Improved highly efficient Dion-Jacobson type perovskite light-emitting diodes by effective surface polarization architecture

被引：3

作者：

Yang, Hanjun ^{[1
,2
]}

Tang, Jun ^{[1
]}

Deng, Liangliang ^{[1
]}

Liu, Zhe ^{[1
]}

Yang, Xia ^{[3
]}

Huang, Zengqi ^{[4
]}

Yu, Haomiao ^{[1
]}

Wang, Kai ^{[1
]}

Li, Jinpeng ^{[1
]}

机构：

[1] Beijing Jiaotong Univ, Sch Sci, Key Lab Luminescence & Opt Informat, Minist Educ, Beijing 100044, Peoples R China

[2] Jiangxi Sci & Technol Normal Univ, Flexible Elect Innovat Inst, Jiangxi Key Lab Flexible Elect, Nanchang 330013, Jiangxi, Peoples R China

[3] Univ Sci & Technol Beijing, Dept Mat Sci & Engn, Beijing 100083, Peoples R China

[4] Chinese Acad Sci ICCAS, Inst Chem, Key Lab Green Printing, 2 Zhongguancun Beiyi St, Beijing 100190, Peoples R China

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2022年 / 24卷 / 13期

基金：

中国国家自然科学基金;

关键词：

Anti-solvents - Film quality - High defect densities - Highly stables - Light-emitting efficiency - Lightemitting diode - Quasi-2d - Salt-assisted - Surface polarizations - Two-dimensional;

D O I：

10.1039/d1cp04951h

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Quasi-two-dimensional (quasi-2D) perovskites are emerging as promising materials for highly stable light-emitting diodes (LEDs). However, their lower charge transport mobilities and higher defect densities may constrain their light-emitting efficiency. Here, we combine an excessive-salt-assisted (ESA) process with antisolvent treatments to inhibit the defects in Dion-Jacobson-type perovskite LEDs. Such a method could improve the film quality and recombination efficiency. By further investigation, we found that artificially building a bulk junction interface and enhancing surface polarization could play a more important role in promoting the ability of charge carrier injection and recombination for high-performance LED devices. Accordingly, the DJ-type quasi-2D perovskite LED can achieve a high external quantum efficiency (EQE) of 7.1%.

引用

页码：7969 / 7977

页数：9