Abstract
A study of the cathodic and anodic doping of polybithiophene and poly-3-phenylthiophene in acetonitrile and propylene carbonate demonstrates that the main fractions of charges of either sign undergo quasireversible redox conversions. Two types of retarded processes reveal themselves. One is associated with conversions of residual portions of positive and negative doping charges trapped in the nonconducting matrix of a neutral polymer at final stages of the undoping process. The other is due to redox conversions of polymer chemically modified when interacting with solution components.
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