Optical studies of electric fields in poly(2-methoxy-5-ethyl(2′-hexyloxy) para-phenylene vinylene) light-emitting diodes

被引：40

作者：

Giebeler, C ^{[1
]}

Whitelegg, SA

Campbell, AJ

Liess, M

Martin, SJ

Lane, PA

Bradley, DDC

Webster, G

Burn, PL

机构：

[1] Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, England

[2] Univ Sheffield, Ctr Mol Mat, Sheffield S3 7RH, S Yorkshire, England

[3] Univ Oxford, Dyson Perrins Lab, Oxford OX1 3QY, England

来源：

APPLIED PHYSICS LETTERS | 1999年 / 74卷 / 24期

关键词：

D O I：

10.1063/1.123238

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report electroabsorption studies of poly(2-methoxy-5-ethyl(2(')-hexyloxy) para-phenylene vinylene) light-emitting diodes. An electric field develops during operation which opposes the field of the applied bias. The counter field builds up within 5 s of turning on the device, increases in magnitude with the operating voltage, and decays exponentially with a time constant between 15 and 32 s. We attribute the counter field to bulk carrier traps and discuss its relevance to the increase of the turn-on voltage as organic light-emitting diodes degrade. (c) 1999 American Institute of Physics. [S0003-6951(99)01224-3].

引用

页码：3714 / 3716

页数：3

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