High-color rendering index white organic light-emitting diodes based on exciplex forming blue emitters

被引:12
作者
Han, Si Hyun [1 ]
Choi, Jeong Min [1 ]
Lee, Jun Yeob [1 ]
机构
[1] Sungkyunkwan Univ, Sch Chem Engn, 2066 Seobu Ro, Suwon 16419, Gyeonggi Do, South Korea
基金
新加坡国家研究基金会;
关键词
White device; Blue emitter; Exciplex; Delayed fluorescence; Phosphorescence; EFFICIENT; EMISSION; DEVICES; COMPONENT; COMPLEX;
D O I
10.1016/j.jiec.2016.10.014
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
A novel emitting layer structure of white organic light-emitting diodes (WOLED) was developed using exciplex-forming two blue emitters, 2,3,4,5,6-penta(9H-carbazol-9-yl)benzonitrile (5CzCN) and tris(2-(1-(2,4-diisopropyldibenzo[b,d]furan-3-yl)-1H-imidazol-2-yl)phenyl)iridium (Ir(dbi)(3)). The 5CzCN blue delayed fluorescence material and Ir(dbi)(3) phosphorescent emitter partially formed a red exciplex in the mixed film. Combination of blue emission from the blue emitters and red emission from the exciplex provided white emission in the blue emitting 5CzCN and Ir(dbi)(3) co-doped device. The WOLED fabricated using the blue emitting 5CzCN and Ir(dbi)(3) emitters achieved high color rendering index of 90.8 at 100 cd/m(2). (C) 2016 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
引用
收藏
页码:49 / 53
页数:5
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