Electrical conductivity and thermoelectric power of highly graphitizable poly(p-phenylene vinylene) films

Abstract

The electrical conductivity and thermoelectric power of poly(p-phenylene vinylene) films have been studied as a function of heat-treatment temperatures (HTT's) up to 2900 \ifmmode^\circ\else\textdegree\fi{}C. The electrical transport is found to turn from a three-dimensional variable-range-hopping mechanism to metallic conduction by heat treatment above 800 \ifmmode^\circ\else\textdegree\fi{}C. The electrical properties of the films with HTT's higher than 2900 \ifmmode^\circ\else\textdegree\fi{}C are shown to be those of well-graphitized carbon.