Doped conjugated polymers temperature dependence

Metallic properties of doped conjugated polymers are observed in the temperature dependence of conductivity, magnetoresistance, thermopower, magnetic susceptibility, and infrared reflectivity. However, the materials of this class are not yet really metallic with long mean free paths they remain just on the metallic side of disorder-induced M-I transition. This implies that significantly higher electrical conductivities will be obtained with continued improvement of the materials. 

Abstract In this chapter we present some useful concepts developed to describe theoretically electrical conduction in disordered organic materials such as molecu-larly doped and conjugated polymers and organic glasses. In such systems electrical conduction is due to incoherent hopping of charge carriers between localised states. We focus on the dependences of the conductivity and the carrier drift mobility on the concentration of localised states, concentration of carriers, temperature and electric field. 

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