High efficiency phosphorescent organic light-emitting diodes using carbazole-type triplet exciton blocking layer

被引：89

作者：

Kim, Sung Hyun

Jang, Jyongsik

Lee, Jun Yeob

机构：

[1] Dankook Univ, Dept Polymer Sci & Engn, Seoul 140714, South Korea

[2] Seoul Natl Univ, Sch Chem & Biol Engn, Seoul 151742, South Korea

来源：

APPLIED PHYSICS LETTERS | 2007年 / 90卷 / 22期

关键词：

D O I：

10.1063/1.2742788

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Device performances of green phosphorescent organic light-emitting diodes using (4,4'-N,N-'-dicarbazole)biphenyl (CBP) and N,N-'-dicarbazolyl-3,5-benzene (mCP) as an exciton blocking layer were investigated. CBP and mCP were introduced between hole transport layer and emitting layer to block triplet exciton quenching and efficient hole transport to emitting layer. The efficiency of green devices could be improved by more than three times by using mCP exciton blocking layer. (C) 2007 American Institute of Physics.

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页数：3

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