Influence of organic capping layers on the performance of transparent organic light-emitting diodes

被引：29

作者：

Lee, Jonghee ^{[1
]}

Hofmann, Simone ^{[1
]}

Furno, Mauro ^{[1
]}

Thomschke, Michael ^{[1
]}

Kim, Yong Hyun ^{[1
]}

Luessem, Bjoern ^{[1
]}

Leo, Karl ^{[1
]}

机构：

[1] Tech Univ Dresden, Inst Angew Photophys, D-01062 Dresden, Germany

来源：

OPTICS LETTERS | 2011年 / 36卷 / 08期

关键词：

DEVICES;

D O I：

10.1364/OL.36.001443

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We investigate a set of transparent organic LEDs (TOLEDs) with different organic capping layer (OC) thicknesses to understand the capping layer effect. We find that thickness variation of the OC strongly influences the emission properties of TOLEDs and exhibits different trends for top or bottom emission. The external quantum efficiency for the top side can be enhanced by a factor of 63%, but that of the bottom side only by 4% compared to a reference device without an OC. Additionally, we demonstrate that the introduction of the OC is an effective method to control the bottom-to-top emission ratio within a measured range from 2.87 to 6.05. (C) 2011 Optical Society of America

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收藏

页码：1443 / 1445

页数：3

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