English 
     
   首 页
   热点信息
语言中心主任致辞
培养方案
专业介绍
招生问答
我院近期科研成果被国际学术...
联系我们
纳米科学技术学院2012年招生...
学生工作办公室简介
请加QQ群312279505
孙宝全教授课题组与John A. McLeod教授、瑞典林雪平大学白赛教授合作在Angewandte Chemie International Edition上发表文章
发布时间:2020-01-13 点击:10

题目:

High-Performance Perovskite Light-Emitting Diode with Enhanced Operational Stability Using Lithium Halide Passivation

作者:

Tian Wu‡1, Junnan Li‡1, Yatao Zou‡1,2, Hao Xu1, Kaichuan Wen3, Shanshan Wan1, Sai Bai*2, Tao Song*1, John A. McLeod*1, Steffen Duhm1, Feng Gao2, Baoquan Sun*1

单位:

1Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, 199 Ren’ai Road, Suzhou 215123, People’s Republic of China

2Department of Physics, Chemistry and Biology (IFM), Linköping University, Linköping, SE-58183,   Sweden.

3Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (Nanjing Tech), Nanjing, China

摘要:

Defect passivation has been demonstrated to be effective in improving the radiative recombination of charge carriers in perovskites, and consequently device performance of the resultant perovskite light-emitting diodes (LEDs). State-of-the-art useful passivation agents in perovskite LEDs are mostly organic chelating molecules, which, however, simultaneously sacrifice the charge transport properties and thermal stability of the resultant perovskite emissive layers, deteriorating the performance especially the operational stability of the devices. In this work, we demonstrate that lithium halides can efficiently passivate defects of halide vacancies and reduce trap state density, suppressing ion migration in perovskite films. Efficient green perovskite LEDs based on all inorganic CsPbBr3 perovskite with a peak external quantum efficiency of 16.2% as well as a high maximum brightness of 50278 cd m-2 are achieved. In addtion, the device shows decent stability even under a brightness of 104 cd m-2. We highlight the universal applicability of defect passivation using lithium halides, which enable us to improve the efficiency and stability of blue and red perovskite LEDs.

影响因子:

12.257

分区情况:

一区

链接:

https://www.onlinelibrary.wiley.com/doi/10.1002/anie.201914000


责任编辑:朱文昌



Copyright © 2012 苏州大学纳米科学技术学院 All Rights Reserved.
  地址:苏州工业园区仁爱路199号910楼  邮编:215123
您是第 位访问者