On the inverse field dependence of conductivity in disordered organic materials
2010
Recently the change in temperature dependence of conductivity observed in polymer memory device prepared from polythiophene, has been attributed to a field-induced transition from a charge-injection-limited current to a trap controlled current. Under a high electrical field, the conductivity becomes independent on temperature and depends exponentially on the inverse of the applied field. In this paper we present a theoretical interpretation of this behavior in the framework of hopping mechanism, where the physical feature is the field effect on the tunneling probability.
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