DOPING-LEVEL DEPENDENCE OF CONDUCTIVITY IN POLYPYRROLES AND POLYTHIOPHENES

Authors
Citation
G. Zotti, DOPING-LEVEL DEPENDENCE OF CONDUCTIVITY IN POLYPYRROLES AND POLYTHIOPHENES, Synthetic metals, 97(3), 1998, pp. 267-272
Citations number
39
Categorie Soggetti
Physics, Condensed Matter","Material Science","Polymer Sciences
Journal title
ISSN journal
03796779
Volume
97
Issue
3
Year of publication
1998
Pages
267 - 272
Database
ISI
SICI code
0379-6779(1998)97:3<267:DDOCIP>2.0.ZU;2-7
Abstract
In situ conductivity of some selected polypyrroles (polypyrrole and po ly (N-methylpyrrole)) and polythiophenes (poly(4,4'-dipentoxydithiophe ne), poly(dithienylethylene) and two crown-5-substituted poly(cyclopen tadithiophenes)) as a function of oxidative doping level is reported. The relationship is in general composed of three segments (threshold, Linear increase and plateau). Doping-charge thresholds of conductivity are explained on the basis of charge pinning of polarons and bipolaro ns by anions and (in polythiophenes) by pi-dimerization of polarons. ( C) 1998 Elsevier Science S.A. All rights reserved.