Efficiency enhancement of flexible organic light-emitting devices by using antireflection nanopillars

被引：23

作者：

Ho, Yu-Hsuan ^{[1
]}

Liu, Chung-Chun ^{[1
]}

Liu, Shun-Wei ^{[2
]}

Liang, Hsun ^{[1
]}

Chu, Chih-Wei ^{[1
]}

Wei, Pei-Kuen ^{[1
]}

机构：

[1] Acad Sinica, Res Ctr Appl Sci, Taipei 115, Taiwan

[2] Acad Sinica, Inst Chem, Taipei 11529, Taiwan

来源：

OPTICS EXPRESS | 2011年 / 19卷 / 10期

关键词：

METAL CATHODE; DIODES; EXTRACTION; OUTPUT; IMPROVEMENT; REFLECTION; REDUCTION;

D O I：

10.1364/OE.19.00A295

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present an antireflection structure consisted of irregular nanopillars to increase light extraction efficiency of flexible organic light-emitting devices. The nanopillars were made by imprinting the anodized aluminum oxide on polycarbonate substrates. The thermal viscosity effect formed the nanopillars with tapered shapes. Such nanopillars show excellent antireflection properties for a wide range of incident angles and wavelengths. The normal transmittance was improved from 85.5% to 95.9% for 150-nm-height nanopillars. The transmittance was greatly improved from 52.8% to 89.1% at 60 degrees incident angle. With this antireflection structure, the device efficiency was improved 69% as compared to devices with flat substrates. Due to wide-angle antireflection, the image contrast ratio was also significantly improved. (C) 2011 Optical Society of America

引用

页码：A295 / A302

页数：8

共 28 条

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