High-efficiency light-emitting diodes using neutral surfactants and aluminum cathode

被引：79

作者：

Niu, YH ^{[1
]}

Ma, H ^{[1
]}

Xu, QM ^{[1
]}

Jen, AKY ^{[1
]}

机构：

[1] Univ Washington, Dept Mat Sci & Engn, Seattle, WA 98195 USA

来源：

APPLIED PHYSICS LETTERS | 2005年 / 86卷 / 08期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1063/1.1865327

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

High-efficiency polymer light-emitting diodes were fabricated by spin-coating a layer of neutral surfactant on top of the poly[2-methoxy-5-(2 '-ethylhexyloxy)-1,4-phenylenevinylene] electroluminescent (EL) layer to facilitate the electron injection through the high-work-function aluminum cathode. The external luminous efficiency of the device can reach 3.59 cd/A, which is higher than the control device (1.89 cd/A) using calcium as cathode. It was found that when the combination of surfactant and aluminum was used as cathode the abundant hole-injection through a hole-transporting layer and hole pile-up at the inner side of the EL/surfactant interface causes an effective electric field to enhance electron injection. (c) 2005 American Institute of Physics.

引用

页码：1 / 3

页数：3

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