Photoelectron spectroscopy study of the energy level alignment at polymer/electrode interfaces in light emitting devices

被引：12

作者：

Greczynski, Grzegorz ^{[2
]}

Kugler, Thomas ^{[1
]}

Salaneck, William R. ^{[2
]}

机构：

[1] ACREO AB, S-60221 Norrkoping, Sweden

[2] Linkoping Univ, Dept Phys, S-56183 Linkoping, Sweden

来源：

CURRENT APPLIED PHYSICS | 2001年 / 1卷 / 01期

基金：

瑞典研究理事会;

关键词：

Interface; Photoelectron spectroscopy; ITO; Electrode; Electroluminescence; Polymer; Band alignment; LED;

D O I：

10.1016/S1567-1739(00)00019-5

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The band alignment at the interface between electroluminescent polymers and the electrodes in polymer-LEDs was studied using photoelectron spectroscopy. Chemical factors like the formation of InCl3 during conversion of precursor-PPV on ITO could be directly monitored with XPS. Films of electroluminescent polymers were studied on a range of ITO and metal electrodes with different work functions, as well as with an intermediate, electrically conducting polymer layer, using UPS. Furthermore, the study of the band alignment at polymer electrode interfaces was extended to three-layer structures: the results confirm the common assumption that the potential drop over the polymer layer in polymer LEDs is equal to the difference between the electrode work functions. (c) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：98 / 106

页数：9

共 23 条

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