An electroluminescence efficiency of 30.3% for a yellow thermally activated delayed fluorescence emitter with a high horizontal emitting dipole ratio

被引：3
|
作者：
Tang, Yan-Qing [1 ]
Zhou, Jing-Xiong [1 ]
Li, Yan-Qing [2 ]
Yang, De-Zhi [3 ]
Zeng, Xin-Yi [1 ]
Zhang, Kai [4 ]
He, Yi-Hui [1 ]
Ren, Hao [1 ]
Ma, Dong-Ge [3 ]
Tang, Jian-Xin [1 ,4 ]
机构：
[1] Soochow Univ, Inst Funct Nano & Soft Mat FUNSOM, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Suzhou 215123, Peoples R China
[2] East China Normal Univ, Nanophoton & Adv Instrument Engn Res Ctr, Sch Phys & Elect Sci, Minist Educ, Shanghai 200062, Peoples R China
[3] South China Univ Technol, Inst Polymer Optoelect Mat & Devices, Guangdong Prov Key Lab Luminescence Mol Aggregates, State Key Lab Luminescent Mat & Devices,Ctr Aggreg, Guangzhou 510640, Peoples R China
[4] Macau Univ Sci & Technol, Macao Inst Mat Sci & Engn MIMSE, Fac Innovat Engn, Taipa 999078, Macao, Peoples R China
来源：
JOURNAL OF MATERIALS CHEMISTRY C | 2023年 / 11卷 / 18期
基金：
中国国家自然科学基金; 国家重点研发计划;
关键词：
DIODES;
D O I：
10.1039/d2tc04968f
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Thermally activated delayed fluorescence (TADF) emitters with a high horizontal emitting dipole ratio (Theta(||)) remain a hot spot in the application of organic light-emitting diodes (OLEDs), which may achieve an extremely high external quantum efficiency (EQE). Herein, two yellow TADF emitters, 3,6,11-triTPA-BPQ and 3,6,12-triTPA-BPQ based on the triphenylamine (TPA) donor, have been synthesized by reasonably introducing nitrogen atoms into different positions of the acceptor core. Both emitters exhibit high horizontal emitting dipole ratios of 92% in doped organic films with photoluminescence quantum yields (phi(PL)) of 94.0% and 78.4%, respectively. Because of high phi(PL) and high light out-coupling ratio induced by high Theta(||) for 3,6,11-triTPA-BPQ, yellow OLEDs using this emitter achieve a maximum external quantum efficiency of 30.3%, which provides a novel way to boost the efficiency of yellow TADF-OLEDs.
引用
收藏
页码：6018 / 6025
页数：8
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