On the cathodic doping of poly(3-methylthiophene)

The characteristics of the P-3MeTh redox processes have been analysed by voltammetry and chronoamperometry; the transport of ions between the polymer film and the bathing solution in a potential range covering both p- and n-doping regions has been monitored by using the probe beam deflection technique. The obtained data is discussed under the light of a model considering the polymer is formed by segments of different lengths.