Polypyrrole semiconductor model

Fig. 11.15. Semiconductor model of the interphase for polypyrrole-aqueous solution. (Reprinted from D. L. Miller and J. O M. Bockris, Structure of the Polypyrrole/Solution Interphase, J. Electrochem. Soc. 139 970-975, 1992. Reproduced by permission of The Electrochemical Society, Inc.)...

Polypyrrole is comparable to inorganic semiconductors from the point of view of the dependence of its conductivity on temperature a decrease in conductivity is observed as temperature increases in the reversible potential range [96,97]. Conductivity fits the Arrhenius equation at temperatures approximately above 250 K. At temperatures (T) between 100 and 25CFK, the electrical conductivity (polypyrrole films has been reported to follow the Mott equation, based on a model of variable range hopping in three dimensions between localized states [98,99] ... 

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