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

被引：58
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
收藏
页码：12503 / 12508
页数：6
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