Improve efficiency of white organic light-emitting diodes by using nanosphere arrays in color conversion layers

被引：11

作者：

Ho, Yu-Hsuan ^{[1
,2
]}

Huang, Ding-Wei ^{[2
]}

Chang, Yung-Ting ^{[2
]}

Ye, Ya-Han ^{[2
]}

Chu, Chih-Wei ^{[1
]}

Tian, Wei-Cheng ^{[2
]}

Chen, Chin-Ti ^{[3
]}

Wei, Pei-Kuen ^{[1
,4
,5
]}

机构：

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

[2] Natl Taiwan Univ, Grad Inst Elect Engn, Taipei 10617, Taiwan

[3] Natl Taiwan Univ, Grad Inst Photon & Optoelect, Taipei 10617, Taiwan

[4] Natl Yang Ming Univ, Inst Biophoton, Taipei 112, Taiwan

[5] Natl Taiwan Ocean Univ, Dept Optoelect, Keelung, Taiwan

来源：

OPTICS EXPRESS | 2012年 / 20卷 / 03期

关键词：

DEVICES; ENHANCEMENT; POLYMER;

D O I：

10.1364/OE.20.003005

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The authors demonstrated an efficient color conversion layer (CCL) by using nanosphere arrays in down-converted white organic light-emitting diodes (WOLEDs). The introduced periodical nanospheres not only helped extract the confined light in devices, but also increased the effective light path to achieve high-efficiency color conversion. By applying a CCL with red phosphor on a 400-nm-period nanosphere array, we achieved 137% color conversion ratio for blue OLEDs, which was 2.68 times higher than conventional flat CCL. The resulting luminous efficiency of WOLEDs with patterned CCLs (20.97 cd/A, 1000 cd/m2) was two times higher than the efficiency of the flat device (10.26 cd/A, 1000 cd/m2). (C)2012 Optical Society of America

引用

页码：3005 / 3014

页数：10

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