MICROWAVE AND DC CONDUCTIVITY OF ALPHA-ET2I3 AND BETA(T)-ET2I3 MICROCRYSTALS IN POLYMER-FILMS

Electrical properties of conducting polymer films containing an ET2I3 (ET = bis(ethylenedithiolo) tetrathiafulvalene) polyiodide crystalline network have been investigated. It is shown that the conditions of pr eparation of these films, i.e., time of exposition to solvent iodine v apours. concentration of iodine in solvent, time and temperature of an nealing, have a very strong influence on the conducting properties of the films. By choosing proper preparation conditions one can obtain co nducting composites showing the conductivity behaviour characteristic of alpha-ET2I3 or beta(t)-ET2I3 single crystals. (C) 1998 Elsevier Sci ence S.A. All rights reserved.