Issue
J. Phys. IV France
Volume 03, Number C7, Novembre 1993
The 3rd European Conference on Advanced Materials and Processes
Troisiéme Conférence Européenne sur les Matériaux et les Procédés Avancés
Page(s) C7-1565 - C7-1568
DOI https://doi.org/10.1051/jp4:19937244
The 3rd European Conference on Advanced Materials and Processes
Troisiéme Conférence Européenne sur les Matériaux et les Procédés Avancés

J. Phys. IV France 03 (1993) C7-1565-C7-1568

DOI: 10.1051/jp4:19937244

Transport properties of conducting polythiophene-polystyrene composites

F. SAMIR1, M. MORSLI1, A. BONNET1, A. CONAN1 and S. LEFRANT2

1  Université de Nantes, Laboratoire de Physique des Matériaux pour l'Electronique, E.A. 1153, 2 rue de la Houssinière, 44072 Nantes cedex 03, France
2  Institut des Matériaux de Nantes, Laboratoire de Physique Cristalline, 2 rue de la Houssinière, 44072 Nantes cedex 03. France


Abstract
Experimental results on electrical conductivity and thermoelectric power for (FeCl3 - doped polythiophene) - polystyrene composites have been performed in the temperature range 77 - 300 K and with polythiophene content in the vicinity and exceeding the percolation threshold. The thermoelectric power observed experimentally exhibits a surprisingly nearly linear behaviour versus T related to the slightly thermally activated electrical conductivity variations. All these results are analyzed in terms of hopping mechanisms. A model involving both the intrinsic resistance of the polythiophene domains and the resistance of the junctions between these domains is considered. The reduction of FeIIIin FeII during the polymerization reaction is discussed on the basis of XPS analysis results.



© EDP Sciences 1993