Simultaneous efficiency enhancement and self-cleaning effect of white organic light-emitting devices by flexible antireflective films

被引：21

作者：

Wu, Dong ^{[1
]}

Zhao, Yong-Biao ^{[2
]}

Wu, Si-Zhu ^{[1
]}

Liu, Yue-Feng ^{[1
]}

Zhang, Hao ^{[1
]}

Zhao, Shuai ^{[1
]}

Feng, Jing ^{[1
]}

Chen, Qi-Dai ^{[1
]}

Ma, Dong-Ge ^{[2
]}

Sun, Hong-Bo ^{[1
,3
]}

机构：

[1] Jilin Univ, Coll Elect Sci & Engn, State Key Lab Integrated Optoelect, Changchun 130023, Peoples R China

[2] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China

[3] Jilin Univ, Coll Phys, Changchun 130023, Peoples R China

来源：

OPTICS LETTERS | 2011年 / 36卷 / 14期

基金：

中国国家自然科学基金;

关键词：

DIODES; EMISSION; LAYER;

D O I：

10.1364/OL.36.002635

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this Letter, we report the improved light outcoupling efficiency of conventional white organic light-emitting devices (OLEDs) by a kind of multifunctional film with both antireflective and superhydrophobic ability. This film consisted of regular polydimethylsiloxane (PDMS) nanopillar arrays, which were readily batch produced by low-cost imprint lithography. The nanopillar arrays could effectively eliminate the light total reflection and enhance the device efficiency of OLEDs by producing the gradual refractive index due to the decreasing material density from glass to air. Moreover, owing to its superhydrophobicity (contact angle similar to 151 degrees), the antireflective film exhibited self-cleaning ability, which was beneficial for keeping the OLEDs substrate clean and ensure the high efficiency of OLEDs. This method is simple, cost-effective, and reproducible. The OLEDs showed an efficiency enhancement of 25% with the multifunctional film. (C) 2011 Optical Society of America

引用

页码：2635 / 2637

页数：3

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