Triazatruxene-based small molecules with thermally activated delayed fluorescence, aggregation-induced emission and mechanochromic luminescence properties for solution-processable nondoped OLEDs

被引：60

作者：

Chen, Yonghong ^{[1
,2
]}

Wang, Shumeng ^{[1
]}

Wu, Xiaofu ^{[1
]}

Xu, Yuxiang ^{[1
,2
,3
]}

Li, Hua ^{[1
,3
]}

Liu, Yang ^{[1
,3
]}

Tong, Hui ^{[1
,3
]}

Wang, Lixiang ^{[1
,3
]}

机构：

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

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

[3] Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY C | 2018年 / 6卷 / 46期

基金：

中国国家自然科学基金;

关键词：

BLUE; AIE; EFFICIENCY; EMITTERS; TADF;

D O I：

10.1039/c8tc04721a

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Two solution processable triazatruxene-based small molecules (TATC-BP and TATP-BP) with thermally activated delayed fluorescence (TADF), aggregation-induced emission (AIE), and mechanochromic luminescence (MCL) properties are synthesized and characterized. Compared with phenyl-substituted TATP-BP, TATC-BP with hexyl substituents showed a clearer MCL with a larger emission color change from 483 to 542 nm upon mechanical grinding. On the other hand, the solution processed nondoped OLED of TATP-BP showed a better EL performance with a maximal current efficiency of 18.9 cd A(-1), a maximum external quantum efficiency (EQE) of 6.0%, and a remarkable small roll-off of 3.3% in EQE even at a luminance of 1000 cd m(-2).

引用

页码：12503 / 12508

页数：6

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