Efficiency enhancement and voltage reduction in white organic light-emitting devices

被引：34

作者：

Lai, S. L. ^{[1
]}

Chan, M. Y.

Fung, M. K.

Lee, C. S.

Lee, S. T.

机构：

[1] City Univ Hong Kong, COSDAF, Hong Kong, Hong Kong, Peoples R China

[2] City Univ Hong Kong, Dept Phys & Mat Sci, Hong Kong, Hong Kong, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2007年 / 90卷 / 20期

关键词：

D O I：

10.1063/1.2740482

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

High-efficiency and low operating voltage fluorescent white organic light-emitting devices (WOLEDs) have been realized by doping either 4,7-diphenyl-1,10-phenanthroline (BPhen) or N,N-'-bis(1-naphthyl)-N,N-'-diphenyl-1,1(')-biphenyl-4,4(')-diamine (NPB) into the blue light-emissive layer. Devices doped with BPhen (or NPB) exhibited a maximum power efficiency of 8.7 lm/W (7.6 lm/W), about 74% higher than that of the reference device (5.0 lm/W). Such performance improvement is ascribed to the incorporation of a better electron-transporting layer and an improved carrier transport through the emissive layer by mixing with the higher drift mobility materials. It provides a simple and general means to improve the power efficiency of WOLED. (C) 2007 American Institute of Physics.

引用

页数：3

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