Understanding the operation of light-emitting electrochemical cells

被引：41

作者：

Fang, Junfeng ^{[1
]}

Yang, Yali ^{[1
]}

Edman, Ludvig ^{[1
]}

机构：

[1] Umea Univ, Dept Phys, Organ Photon & Elect Grp, SE-90187 Umea, Sweden

来源：

APPLIED PHYSICS LETTERS | 2008年 / 93卷 / 06期

关键词：

D O I：

10.1063/1.2969034

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The ionic concentration (c(ion)) is demonstrated to play a critical role for the operation of wide-gap light-emitting electrochemical cells. p-type and n-type doped regions are observed to grow from the anode and cathode, respectively, and form a light-emitting p-n junction when c(ion)>= 0.1 ions/conjugated-polymer repeat unit. For lower c(ion), the doped regions come to a full stop before making contact and forming a p-n junction due to an ion-depletion effect. Finally, the n-type doped polymer is observed to be unstable over time under inert conditions, suggesting that a chemical side reaction between the n-type doped polymer and the electrolyte takes place. (C) 2008 American Institute of Physics.

引用

页数：3

共 23 条

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