title: Theoretical temperature dependence of the charge-carrier mobility in semiconducting polymers.
abstract: We present a theory of the temperature and electric field dependence on the mobility of polarons in conjugated polymers in terms of a tight-binding and stochastic approach. The polaron mobility is shown to have a strong dependence on the electric field, with two distinct regimes of temperature dependence. Lattice thermal oscillations enhance polaron mean velocity for electric fields of 1.0 mV/A or higher. In contrast, its mobility is damped by thermal oscillations under weaker electric fields. This semiconductor/metallic analogous behavior comes from the difference between the inertial content acquired by polarons under stronger/weaker electric fields. These new results and their analysis shed new light on several experimental controversies.
authors: Dipartimento di Chimica, Università di Perugia, 06123 Perugia, Italy.
authors: Luiz F
authors: LF
authors: Roncaratti
authors: Ricardo
authors: R
authors: Gargano
authors: Geraldo
authors: G
authors: Magela e Silva