Light outcoupling enhancement from top-emitting organic light-emitting diodes made on a nano-sized stochastic texture surface

被引：17

作者：

Park, Woo-Young ^{[1
]}

Kwon, Yongwon ^{[1
]}

Lee, Changhee ^{[1
]}

Whang, Ki-Woong ^{[1
]}

机构：

[1] Seoul Natl Univ, Interuniv Semicond Res Ctr, Sch Elect & Comp Engn, Seoul 151742, South Korea

来源：

OPTICS EXPRESS | 2014年 / 22卷 / 25期

关键词：

DEVICES; EFFICIENCY; EXTRACTION;

D O I：

10.1364/OE.22.0A1687

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

An effective method for enhancing the light outcoupling efficiency from top-emitting organic light-emitting diodes (TEOLEDs) with a nano-sized stochastic texture surface (NSTS) is suggested. The broadly distributed pitch and the randomly sized of islands in the NSTS enable the photons that are otherwise trapped to be emitted over the broad emission wavelength range. The NSTS-embedded TEOLEDs have wide angular-dependent emission characteristics and an enhanced external quantum efficiency (EQE). Theoretical and full-wave optical calculations were performed to understand the mechanisms of the efficiency enhancement. Optimized TEOLEDs achieved a 32% EQE enhancement compared with the reference devices without the NSTS. (C)2014 Optical Society of America

引用

页码：A1687 / A1694

页数：8

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