Concentration quenching-resistant multiresonance thermally activated delayed fluorescence emitters

被引：44
作者：
Kim, J. H. [1 ,2 ]
Chung, W. J. [2 ]
Kim, J. [1 ]
Lee, J. Y. [2 ]
机构：
[1] Univ Michigan, Dept Mat Sci & Engn, Dept Chem, Dept Macromol Sci & Engn,Dept Chem Engn, Ann Arbor, MI 48109 USA
[2] Sungkyunkwan Univ, Sch Chem Engn, 2066 Seobu Ro, Suwon 440746, Gyeonggi Do, South Korea
来源：
MATERIALS TODAY ENERGY | 2021年 / 21卷
关键词：
Small FWHM; High efficiency; Deep blue emission; Multi-resonance; LIGHT-EMITTING-DIODES; EFFICIENCY;
D O I：
10.1016/j.mtener.2021.100792
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A deep blue thermally activated delayed fluorescence (TADF) organic light-emitting diode resistant to the concentration quenching effect was developed using a multiresonance-type boron emitter decorated with a di(tert-butylphenyl)amine unit. The di(tert-butylphenyl)amine group surrounding the rigid core structure enabled a high photoluminescence quantum yield and fast reverse intersystem crossing of the multiresonance TADF emitter even at high doping concentrations. The multiresonance B-N type blue TADF emitter showed narrow blue emission spectrum with a full width at half maximum of 25 nm without bathochromic shift by the additional donor. It showed a high external quantum efficiency of more than 26%, a deep blue emission color of (0.13, 0.08), and a very small efficiency decrease of 2% even at high doping concentrations. (C) 2021 Elsevier Ltd. All rights reserved.
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页数：7
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