Electric conduction of polypyrrole at low temperatures (original) (raw)

Ukrainian Journal of Physics

Abstract

The electric conduction of the conducting polynter films of polypyrrole prepared by the electrochemical anodic polymerization has been studied within the low temperature range 300 to 1.5 K. It has been found that over the whole temperature range these fils have a variable range hopping conduction which is described by the Mott law R~exp(To/T)1/4, The films prepared with acceleration of polymerization due to usage of a depolarizer have less resistance and weaker temperature dependence. They have also “high temperature” (T > 20K) and “low temperature” (T< 6 K) parts of the Mott conduction with different T0, and short interval situated between those two with stronger R(T). The possible reasons for such conduction behavior of polypyrrole films are discussed.

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