Optical, electrochemical and conductive properties of polythiophene multilayers on ITO/glass electrodes

Polythiophene-based polyelectrolyte multilayers have been layer-by-layer de posited on ITO/glass and characterized by UV-vis spectroscopy, cyclic volta mmetry and conductivity. Multilayers in which both polycation and polyanion are based on the same polythiophene backbone are reported for the first ti me. Uv-vis spectroscopy and cyclic voltammetry indicate a linear dependence of the amount of deposited polymer on the number of deposition cycles. The amount of deposition depends on the oxidation state of the polythiophene. The sheet and perpendicular conductivities of the multilayers and their pho toluminescence properties are reported.