Alternating conductivity of conducting polymers studied by a transfer-matrix technique

A statistical model of resistor network is proposed to describe a polymer structure and to simulate the real component of its ac resistivity. It takes into account the polydispersivity of the material as well as intrachain and interchain charge transport processes. By the application of a transfer matrix technique, it reproduces ac resistivity measurements carried out with polyaniline films in different doping degrees. Our results indicate that interchain processes govern the resistivity behaviour in the low frequency region while for higher frequencies intrachain mechanisms are dominant.