X-RAY PHOTOELECTRON SPECTROSCOPIC INVESTIGATION OF CONDUCTING POLYMERBLENDS

Electrochemically prepared films of conducting polymers of polypyrrole and polythiophene and their blends with polyamide have been investiga ted by X-ray photoelectron spectroscopy. In the N1s region of the spec tra of films containing polypyrrole the peak corresponding to N+ at 40 2.0 eV is separated from that of neutral N. The intensity of the N+ pe ak can be correlated with the electrical conductivity of the films and the spectroscopically derived ratio of F/N+ is close to 4 indicating that one BF4- dopant ion is incorporated for every oxidized nitrogen c enter. In the spectra of films of polythiophene and its blends peaks c orresponding to S and S+ can not be resolved but again the F/C ratio c orrelates with the electrical conductivity.