Bipyridyl substituted triazoles as hole-blocking and electron-transporting materials for organic light-emitting devices

被引：23

作者：

Ichikawa, Musubu ^{[1
]}

Fujimoto, Soichi ^{[1
]}

Miyazawa, Yuta ^{[1
]}

Koyama, Toshiki ^{[1
]}

Yokoyama, Norimasa ^{[2
]}

Miki, Tetsuzo ^{[2
]}

Taniguchi, Yoshio ^{[1
]}

机构：

[1] Shinshu Univ, Dept Funct Polymer Sci, Nagano 3868567, Japan

[2] Hodogaya Chem Co Ltd, Tsukuba, Ibaraki 3050841, Japan

来源：

ORGANIC ELECTRONICS | 2008年 / 9卷 / 01期

关键词：

amorphous material; hole blocking; electron transporting; triazole; electroluminescent device; OLED; phosphorescent device; mobility; pyridine;

D O I：

10.1016/j.orgel.2007.09.002

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have demonstrated bipyridyl substituted triazole derivatives (Bpy-TAZs) as an electron-transporting material for organic light-emitting devices (OLEDs). Substitution of triazole with bipyridyl is a good way to improve electron-transporting ability of triazoles with keeping good hole-blocking ability, which is a useful property of triazole derivatives. A Bpy-TAZ has high electron mobility of above 10(-4) cm(2)/V s. Moreover, by employing one of Bpy-TAZs as a hole-blocking and electron-transporting material for phosphorescent OLEDs, lower operation voltage was achieved with keeping the same external quantum efficiency of electroluminescence (almost 10%) as compared with the conventional hole-blocking and electron-transporting bilayer consisting of bathocuproine and tris (8-hydroxyquinolinato) aluminum. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：77 / 84

页数：8

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