Electrical Conductivity and Thermoelectric Power of Heat-Treated Poly(p-phenylene) Films

Abstract

Poly(p-phenylene) films were heat-treated at various temperatures up to 2800°C. Heat-treated films are stable in air and show the wide range of electrical conductivity and are remarkably enhanced by heat-treatment above 600°C, which is interpreted in terms of the carbonization. Heat-treated films yield small positive thermoelectric power. From temperature dependences of electrical conductivity and thermoelectric power for the films heat-treated above 800°C, the metallic conduction is working only in the carbonized fragments.