期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 58, 期 27, 页码 9088-9094出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201903332
关键词
four-coordinate boron; operational stability; organic light-emitting diodes; thermally activated delayed fluorescence; tridentate ligand
资金
- HKU Development Fund
- Dr. Hui Wai Haan Fund
- University of Hong Kong under the University Research Committee (URC) Strategically Oriented Research Theme on Functional Materials for Molecular Electronics
- University Grants Committee Areas of Excellence (AoE) Scheme from the Hong Kong Special Administrative Region, China [AoE/P-03/08]
- University of Hong Kong
A new class of four-coordinate donor-acceptor fluoroboron-containing thermally activated delayed fluorescence (TADF) compounds bearing a tridentate 2,2'-(pyridine-2,6-diyl)diphenolate (dppy) ligand has been successfully designed and synthesized. Upon varying the donor moieties from carbazole to 10H-spiro[acridine-9,9'-fluorene] to 9,9-dimethyl-9,10-dihydroacridine, these boron derivatives exhibit a wide range of emission colors spanning from blue to yellow with a large spectral shift of 2746 cm(-1), with high PLQYs of up to 96% in the doped thin film. Notably, vacuum-deposited organic light-emitting devices (OLEDs) made with these boron compounds demonstrate high performances with the best current efficiencies of 55.7 cd A(-1), power efficiencies of 58.4 lm W-1 and external quantum efficiencies of 18.0%. More importantly, long operational stabilities of the green-emitting OLEDs based on 2 with half-lifetimes of up to 12 733 hours at an initial luminance of 100 cd m(-2) have been realized. This work represents for the first time the design and synthesis of tridentate dppy-chelating four-coordinate boron TADF compounds for long operational stabilities, suggesting great promises for the development of stable boron-containing TADF emitters.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据