High-color-rendering pure-white phosphorescent organic light-emitting devices employing only two complementary colors

被引：63

作者：

Chang, Chih-Hao ^{[1
]}

Chen, Chung-Chia ^{[1
]}

Wu, Chung-Chih ^{[1
]}

Chang, Sheng-Yuan ^{[2
]}

Hung, Jui-Yi ^{[2
]}

Chi, Yun ^{[2
]}

机构：

[1] Natl Taiwan Univ, Dept Elect Engn, Grad Inst Photon & Optoelect, Grad Inst Elect Engn, Taipei 10617, Taiwan

[2] Natl Tsing Hua Univ, Dept Chem, Hsinchu 300, Taiwan

来源：

ORGANIC ELECTRONICS | 2010年 / 11卷 / 02期

关键词：

Osmium complex; Iridium complex; White OLEDs; Color rendering index; HIGH-EFFICIENCY; ELECTROPHOSPHORESCENT DEVICES; QUANTUM EFFICIENCY; TRIPLET EXCITONS; ORANGE PHOSPHOR; DOUBLE-EMISSION; BLUE; DIODES; OLEDS; COMPLEXES;

D O I：

10.1016/j.orgel.2009.11.004

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report successful fabrication of high-color-rendering pure-white phosphorescent organic light-emitting devices (OLEDs) by employing a true-blue iridium complex Ir(dfbp-py)(fbppz)(2) and a wide-bandwidth yellow emitting osmium complex Os(bptz)(2)(dppee). The two-component phosphorescent white OLED exhibited a high color rendering index (CRI) of 81 and CIEx,y coordinates close to the ideal white emission (0.33, 0.33). By doping the yellow phosphors into the hole-transport layer and the electron-transport layer adjacent to the blue-emitting layer and thereby forming a triple-emitting-layer device structure, we obtained WOLED which exhibited rather stable colors at different biases/brightnesses. Such high-CRI pure-white two-component WOLEDs yielded EL efficiencies of up to 9.5%, 22.9 cd/A, and 20 lm/W for the forward directions. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：266 / 272

页数：7

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