Thermally Activated Delayed Fluorescence Conjugated Polymers with Backbone-Donor/Pendant-Acceptor Architecture for Nondoped OLEDs with High External Quantum Efficiency and Low Roll-Off

被引：126

作者：

Yang, Yike ^{[1
,2
]}

Wang, Shumeng ^{[1
]}

Zhu, Yunhui ^{[1
,2
]}

Wang, Yanjie ^{[1
,2
]}

Zhan, Hongmei ^{[1
]}

Cheng, Yanxiang ^{[1
]}

机构：

[1] Chinese Acad Sci, State Key Lab Polymer Phys & Chem, Changchun Inst Appl Chem, Changchun 130022, Jilin, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

来源：

ADVANCED FUNCTIONAL MATERIALS | 2018年 / 28卷 / 10期

基金：

国家重点研发计划; 中国国家自然科学基金;

关键词：

acceptor; benzophenone; conjugated polymer; electroluminescence; thermally activated delayed fluorescence; LIGHT-EMITTING-DIODES; TRIPLET EXCITED-STATES; MOLECULAR DESIGN; CHARGE-TRANSFER; ELECTROLUMINESCENCE; BENZOPHENONE; EMITTERS; SINGLET;

D O I：

10.1002/adfm.201706916

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Most thermally activated delayed fluorescence (TADF) emitters have to be doped in the host for fabricating efficient organic light-emitting diodes (OLEDs) and always suffer from quick efficiency roll-off at high brightness, which severely affect their commercial application in display and lighting fields. In the work, a series of the polymers are synthesized by copolymerization of two carbazole monomers and one acridine derivative monomer containing benzophenone acceptor group. The obtained polymers therefore possess a conjugated backbone with carbazole/acridine moieties and benzophenone pendant to form the twisted donor/acceptor structure. Consequently, the TADF features inherited from the acridine derivative are maintained and improved by managing the content of acridine derivative monomer in the polymers. Solution-processed OLEDs obtained from using neat polymer films exhibit comparable performance with organic TADF small molecules, achieving a maximum external quantum efficiency (EQE) of 18.1% and a very slow roll-off with EQE of 17.8% at the luminance of 1000 cd m(-2).

引用

页数：6

共 26 条

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