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

页码：32 / 37

页数：6

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