Bright high efficiency blue organic light-emitting diodes with Al2O3/Al cathodes

被引：110

作者：

Tang, H ^{[1
]}

Li, F ^{[1
]}

Shinar, J ^{[1
]}

机构：

[1] IOWA STATE UNIV,DEPT PHYS & ASTRON,AMES,IA 50011

来源：

APPLIED PHYSICS LETTERS | 1997年 / 71卷 / 18期

关键词：

D O I：

10.1063/1.119325

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The behavior of bright, efficient, low-driving-voltage blue organic light-emitting diodes based on amino-oxadiazole-fluorenes (AODFs) with Al2O3/Al cathodes is described. It is shown that the thin Al2O3 buffer layer sharply enhances current injection, increases the device efficiency, and reduces the driving voltage; the performance of devices with the optimal oxide buffer layer thickness approaches those with Mg0.9Ag0.1 cathodes. The effects of the Al2O3 buffer layer are believed to result from the removal of interface gap states induced by defects and chemical bonds between the AODF and Al, which trap carriers and quench singlet excitons nonradiatively. (C) 1997 American Institute of Physics. [S0003-6951(97)00144-7].

引用

页码：2560 / 2562

页数：3

共 17 条

[1]

AMIR O, UNPUB

[2]

ANTONIADIS H, UNPUB

[3] CALCIUM ELECTRODES IN POLYMER LEDS [J].