Triplet host engineering for triplet exciton management in phosphorescent organic light-emitting diodes

被引：40

作者：

Kim, Sung Hyun ^{[2
]}

Jang, Jyongsik ^{[2
]}

Yook, Kyoung Soo ^{[1
]}

Lee, Jun Yeob ^{[1
]}

Gong, Myoung-Seon ^{[3
]}

Ryu, Sangouk ^{[4
]}

Chang, Gee-Keun ^{[4
]}

Chang, Ho Jung ^{[4
]}

机构：

[1] Dankook Univ, Dept Polymer Sci & Engn, Yongin 448701, Kyeonggi, South Korea

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

[3] Dankook Univ, Dept Chem, Cheonan 330714, Chungnam, South Korea

[4] Dankook Univ, Dept Elect Engn, Cheonan 330714, Chungnam, South Korea

来源：

JOURNAL OF APPLIED PHYSICS | 2008年 / 103卷 / 05期

关键词：

D O I：

10.1063/1.2841058

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The device performances of green phosphorescent organic light-emitting diodes with a triplet mixed host emitting layer were correlated with the energy levels and composition of the host materials. Two hole-transport-type host materials, (4,4'-N,N'-dicarbazole)biphenyl (CBP) and 4,4',4"-tris(N-carbazolyl)triphenylamine (TCTA), were combined with two electron-transport-type host materials, 1,3,5-tris(N-phenylbenzimidazole-2-yl)benzene (TPBI) and PH1. The maximum quantum efficiency was obtained in the 5:5 mixed host in the case of TCTA:TPBI and TCTA:PH1, while CBP:PH1 showed the best performances in the 9:1 mixed host. The quantum efficiency of the green mixed host devices was improved by more than 50% compared with that of the corresponding single host devices. (C) 2008 American Institute of Physics.

引用

页数：4

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