This paper reports results on the oxidation of polybithiophene in acetonitrile, obtained using in situ FTIR. At doping levels ⩽ 11%, the data can be interpreted in terms of a polaron-hopping model, the polaron being ca. five to six monomer units in length. At higher doping levels, the results are consistent with the polymer behaving as a narrow bandgap semiconductor. Ellipsometric measurements are also reported.
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Christensen et al. (1992) studied this question.