Band bending in doped conducting polypyrrole: interaction with silver

被引：22

作者：

Mikalo, RP ^{[1
]}

Appel, G ^{[1
]}

Hoffmann, P ^{[1
]}

Schmeisser, D ^{[1
]}

机构：

[1] Brancenburg Tech Univ Cottbus, D-03044 Cottbus, Germany

来源：

SYNTHETIC METALS | 2001年 / 122卷 / 02期

关键词：

PEEM; MARPE; polaron; polypyrrole; conducting polymer; metal-semiconductor contact;

D O I：

10.1016/S0379-6779(00)00331-3

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Small amounts of silver were evaporated onto conducting polypyrrole films doped by organic anions like tosylate or copper phthalocyanine trisulfonate. The electronic structure of these systems was studied by photoemission electron microscopy, by photoemission spectroscopy and near edge X-ray absorption spectroscopy. This investigation is an attempt to study the interaction of metallic contacts with organic semiconductors. A shift of the secondary electron onset in the valence band spectra was observed. This shift is caused by the neutralization of positive surface charges by an electron transfer from silver. We conclude that a natural band bending exists in pristine polypyrroles. We determine the hat band situation and describe the electronic structure in a band-model scheme. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：249 / 261

页数：13

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