Improved drive voltages of organic electroluminescent devices with an efficient p-type aromatic diamine hole-injection layer

被引：122

作者：

Ganzorig, C ^{[1
]}

Fujihira, M ^{[1
]}

机构：

[1] Tokyo Inst Technol, Dept Biomol Engn, Midori Ku, Yokohama, Kanagawa 2268501, Japan

来源：

APPLIED PHYSICS LETTERS | 2000年 / 77卷 / 25期

关键词：

D O I：

10.1063/1.1331640

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

An SbCl5-doped N,N'-diphenyl-N,N'-bis(3-methylphenyl)-1,1'-biphenyl-4,4'-diamine (TPD) thin film was studied as a hole-injection layer in low-molecular-weight organic electroluminescent (EL) devices. EL characteristics of devices with a TPD hole-injection layer doped with other oxidizing reagents, such as iodine, FeCl3, and tris(4-bromophenyl)aminium hexachloroantimonate were compared with that of SbCl5-doped TPD. The device with SbCl5-doped TPD on a cleaned indium-tin-oxide (ITO) substrate exhibited the best performance of all the devices studied. The improvement in device performance was attributed to an increase in work function of ITO due to acid formation as a result of hydrolysis of SbCl5 and by thinning the tunneling barrier for hole injection due to formation of the space charge region in highly doped TPD with SbCl5. (C) 2000 American Institute of Physics. [S0003- 6951(00)03950-4].

引用

页码：4211 / 4213

页数：3

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