Highly Efficient Blue Thermally Activated Delayed Fluorescence Emitters Based on Multi-Donor Modified Oxygen-Bridged Boron Acceptor

被引：8
作者：
Meng, Xin-Yue [1 ]
Feng, Zi-Qi [1 ]
Yu, You-Jun [1 ]
Liao, Liang-Sheng [1 ]
Jiang, Zuo-Quan [1 ]
机构：
[1] Soochow Univ, Inst Funct Nano & Soft Mat, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Joint Int Res Lab Carbon Based Funct Mat & Device, Suzhou 215123, Peoples R China
来源：
MOLECULES | 2022年 / 27卷 / 13期
基金：
中国国家自然科学基金;
关键词：
multi-donor; boron; TADF; high efficiency; OLEDs; LIGHT-EMITTING-DIODES; DESIGN STRATEGY; CHARGE-TRANSFER;
D O I：
10.3390/molecules27134048
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
The employment of thermally activated delayed fluorescence (TADF) emitters is one of the most promising ways to realize the external quantum efficiency (EQE) of over 25% for organic light-emitting diodes (OLEDs). In addition, the TADF emitter based on oxygen-bridged boron (BO) fragment can maintain blue emission with high color purity. Herein, we constructed two blue TADF emitters, 3TBO and 5TBO, for OLEDs application. Both emitters consist of three donors linked at the oxygen-bridged boron acceptor. OLED devices based on 3TBO and 5TBO exhibited both high excellent device efficiency and high color purity with a maximum EQE; full-width at half-maximum (FWHM); and CIE coordinates of 17.3%, 47 nm, (0.120, 0.294), and 26.2%, 57 nm, (0.125, 0.275), respectively.
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页数：9
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