Electrical and Optical Properties of a Stable Synthetic Metallic Polymer: Polypyrrole

Abstract

Absorption and reflection spectra of the polypyrrole films prepared by electrochemical polymerization are shown over the wide wavelength region and the best fit of the calculated reflection spectra is presented to the observed spectra. Electrical conductivity of the film is measured as a function of temperature and a plot of logσ vs. T^−1⁄4 gives a straight line over the 4.2–300 K region. Furthermore, the thermoelectric-power, S, of the polypyrrole film is shown in the form of S vs. T on a linear scale. Based on these results, the conduction mechanism of polypyrrole film is discussed.