Controlling charge transport by using a mixed hole transport layer in phosphorescent organic light-emitting diodes

被引：1

作者：

Kim, Sung Hyun ^{[1
]}

Song, Kigook ^{[1
]}

机构：

[1] Kyung Hee Univ, Dept Adv Mat Engn Informat & Elect, Yongin 446701, South Korea

来源：

JOURNAL OF THE KOREAN PHYSICAL SOCIETY | 2013年 / 62卷 / 02期

关键词：

Mixed host transport layer; PHOLEDs; Charge balance; Quantum efficiency; DEVICES;

D O I：

10.3938/jkps.62.206

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The device performances of green phosphorescent organic light-emitting diodes (PHOLEDs) with a mixed hole transport layer (HTL) and either of two host materials were compared as a function of the mixed HTL composition. The mixed HTL was prepared using N,N'-di(1-naphthyl)-N,N'-diphenylbenzidine (NPB) and 4,4',4aEuro(3)-tris(N-carbazolyl)triphenylamine (TCTA), which were combined with either a hole-transport-type host material, (4,4'-N,N'-dicarbazole)biphenyl (CBP) or an electron-transport-type host material, PH1. The maximum quantum efficiency of the PHOLEDs was attributed to the charge balance in the emitting layer (EML) and to the blocking of the triplet excitons caused by increasing TCTA composition in the mixed HTL.

引用

页码：206 / 209

页数：4

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