High color rendering index and chromatic-stable white organic light emitting diodes incorporating excimer and fluorescence emission

被引：23
|
作者：
Xiong, Linghao [1 ,2 ]
Zhu, Wenqing [1 ,2 ]
Wei, Na [2 ]
Li, Jiaheng [2 ]
Sun, Wenbing [2 ]
Wu, Xiaoliang [2 ]
Cao, Jin [2 ]
Wang, Zixing [2 ]
机构：
[1] Shanghai Univ, Sch Mat Sci & Engn, Shanghai 200072, Peoples R China
[2] Shanghai Univ, Minist Educ, Key Lab Adv Display & Syst Applicat, Shanghai 200072, Peoples R China
来源：
ORGANIC ELECTRONICS | 2013年 / 14卷 / 01期
基金：
上海市自然科学基金;
关键词：
Organic light emitting diodes; Color rendering index; Excimer; Excition confinement; EFFICIENCY; EXCITON; DEVICES; PERFORMANCE;
D O I：
10.1016/j.orgel.2012.10.018
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We developed high color rendering index (CRI) white organic light emitting diodes (WOLEDs) by the incorporation of yellow or green fluorescence emission located between the monomer and excimer emission of platinum [1,3-difluoro-4,6-di (2-pyridinyl) benzene]chloride (Pt-4). The devices comprising yellow or green fluorescence emission exhibited a maximum CRI of 92 and 94, respectively. Meanwhile, the devices showed excellent chromatic stability and low efficiency roll-off. We attribute the high CRI to the perfect spectrum complement and the relative intensity adjustment between two emission layers (EMLs). The mechanism of triplet excition confinement plays a crucial role in the suppression of chromaticity shifting and efficiency roll-off. (c) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：32 / 37
页数：6
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