Engineering of Mixed Host for High External Quantum Efficiency above 25% in Green Thermally Activated Delayed Fluorescence Device

被引：232
|
作者：
Kim, Bo Seong [1 ]
Lee, Jun Yeob [1 ]
机构：
[1] Dankook Univ, Dept Polymer Sci & Engn, Yongin 448701, Gyeonggi, South Korea
来源：
ADVANCED FUNCTIONAL MATERIALS | 2014年 / 24卷 / 25期
关键词：
LIGHT-EMITTING-DIODES; BLUE; EMISSION;
D O I：
10.1002/adfm.201303730
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Highly efficient thermally activated delayed fluorescence (TADF) devices are developed by engineering mixed host materials in the emitting layer. Mixed hosts with deep highest occupied molecular orbital and high singlet energy without any exciplex formation are ideal as the host material for the TADF organic light-emitting diodes. A high external quantum efficiency of 28.6% is achieved in the green TADF organic light-emitting diodes using a mixed host of 1,3-bis(N-carbazolyl) benzene: 1,3,5-tri[(3-pyridyl)-phen-3-yl] benzene and green emitting (4s,6s)-2,4,5,6-tetra(9H-carbazol-9-yl) isophthalonitrile TADF emitter.
引用
收藏
页码：3970 / 3977
页数：8
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