ELECTROCHEMICAL STUDY ON POLYPYRROLE - POLY(3-OCTYLTHIOPHENE) BILAYERFILMS

Bilayer film electrodes of polypyrrole and poly(3-octylthiophene) were prepared by electrochemical polymerization of the corresponding monom ers. The electrochemical behaviour of the electrodes in LiBF4-propylen e carbonate solution was studied by cyclic voltammetry and impedance s pectroscopy. The impedance data, obtained at different dc potentials, were fitted to equivalent electrical circuits providing information ab out charge transfer and diffusion processes across the bilayer film el ectrodes.