Lithium cobalt oxide as electron injection material for high performance organic light-emitting diodes

被引：12
|
作者：
Zhang, Deqiang [1 ]
Li, Yang [1 ]
Zhang, Guohui [1 ]
Gao, Yudi [1 ]
Duan, Lian [1 ]
Wang, Liduo [1 ]
Qiu, Yong [1 ]
机构：
[1] Tsinghua Univ, Dept Chem, Key Lab Organ Optoelect & Mol Engn, Minist Educ, Beijing 100084, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2008年 / 92卷 / 07期
基金：
中国国家自然科学基金;
关键词：
D O I：
10.1063/1.2828859
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Lithium cobalt oxide was introduced into organic light-emitting diodes as the electron injection layer. The device with tris(8-hydroxyquinolato) aluminum doped with 10-(2-benzothiazolyl)-1,1,7,7-tetramethyl-2,3,6,7-tetrahydro-1H,5H,11H-[1]benzopyrano[6,7,8-ij]quinolizin-11-one as the light-emitting layer and LiCoO2 as the electron injection layer showed promising efficiency (10.74 cd/A at 11 V) and longer lifetime (2.8 times as much as LiF/Al control device). Lithium cobalt oxide proved to be thermally decomposed in vacuum to form lithium oxide, which was responsible for the enhanced electron injection. (C) 2008 American Institute of Physics.
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页数：3
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