Comparative studies on the inorganic and organic p-type dopants in organic light-emitting diodes with enhanced hole injection

被引：65

作者：

Gao, Chun-Hong ^{[1
]}

Zhu, Xiao-Zhao ^{[1
]}

Zhang, Lei ^{[1
]}

Zhou, Dong-Ying ^{[1
]}

Wang, Zhao-Kui ^{[1
]}

Liao, Liang-Sheng ^{[1
,2
]}

机构：

[1] Soochow Univ, Inst Funct Nano & Soft Mat FUNSOM, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Suzhou 215123, Jiangsu, Peoples R China

[2] Jilin Univ, State Key Lab Integrated Optoelect, Changchun 130012, Jilin, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2013年 / 102卷 / 15期

关键词：

ELECTROLUMINESCENT DEVICES; LAYER; PHTHALOCYANINE; FILMS; COSUBLIMATION; ELECTRODES; EFFICIENT; ACCEPTOR;

D O I：

10.1063/1.4802081

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Comparative studies on inorganic and organic electron acceptors used as p-dopants in N,N'-di(naphthalene-1-yl)-N,N'-diphenyl-benzidine (NPB) in organic light-emitting diodes (OLEDs) are carried out. It demonstrates that 1,4,5,8,9,11-hexaazatriphenylene-hexacarbonitrile (HAT-CN) doped hole-injecting layer is superior to molybdenum trioxide (MoO3) doped one in device efficiency and stability. Combining with absorption spectral measurement, the effectiveness of a p-doped NPB in OLEDs does not solely rely on the generation of charge-transfer complexes in the doped NPB. The detailed difference between MoO3 and HAT-CN as p-dopants in NPB is further investigated by evaluating the hole injection efficiency, hole barrier height, and surface morphology of the doped films. (C) 2013 AIP Publishing LLC [http://dx.doi.org/10.1063/1.4802081]

引用

页数：5

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