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
张晓宏教授课题组在Advanced Materials上发表论文
发布时间:2018-03-15 点击:1

题目:

Avoiding Energy Loss on TADF Emitters: Controlling the Dual Conformations of D�A Structure Molecules Based on the Pseudoplanar Segments

 

作者:

Kai Wang,1,2,3 Cai-Jun Zheng,2,3* Wei Liu,1,3 Ke Liang,1 Yi-Zhong Shi,1 Si-Lu Tao,2 Chun-Sing Lee,4* Xue-Mei Ou,1 and Xiao-Hong Zhang1,3*

 

单位:

1Institute of Functional Nano & Soft Materials (FUNSOM) and Jiangsu, Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, Jiangsu 215123, P. R. China

2School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTC), Chengdu, Sichuan 610054, P. R. China

3Nano-organic Photoelectronic Laboratory and Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China

4Center of Super-Diamond and Advanced Films (COSDAF) and Department of Chemistry, City University of Hong Kong

Hong Kong SAR, P. R. China

 

摘要:

The recent introduction of thermally activated delayed fluorescence (TADF) emitters is regarded as an important breakthrough for the development of high efficiency organic light-emitting devices (OLEDs). The planar D and A groups are generally used to construct TADF emitters for their rigid structure and large steric hindrance. In this work, it is shown that many frequently used nonaromatic (noncontinuous conjugation or without satisfying Hückel’s rule) planar segments, such as 9,9-dimethyl-9,10-dihydroacridine, are actually pseudoplanar segments and have two possible conformations�a planar form and a crooked form. Molecules constructed from pseudoplanar segments can thus have two corresponding conformations. Their existence can have significant impact on the performance of many TADF emitters. Two design strategies are presented for addressing the problem by either (1) increasing the rigidity of these groups to suppress its crooked form or (2) increasing the steric hindrance of the linked group to minimize energy of the emitters with the highly twisted form. Following these strategies, two new emitters are synthesized accordingly and successfully applied in OLEDs demonstrating high external quantum efficiencies (20.2% and 18.3%).

 

影响因子:

19.791

 

分区情况:

一区

 

链接:

http://onlinelibrary.wiley.com/doi/10.1002/adma.201701476/epdf

 

责任编辑:向丹婷


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