The Impact of Molecular Polarization on the Electronic Properties of Molecular Semiconductors

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  • 13 June 2003
Abstract
The ground state of a carrier in a molecular semiconductor is studied using a model hamiltonian in which the itinerant charge is treated in the tight binding approximation and is coupled, through charge-dipole interaction terms to a quantum field of Frenkel-excitons representing the surrounding, polarizable molecules. We demonstrate that, in the presence of static or thermal disorder, this "electronic polaron" problem can be mapped onto an Anderson model with correlated diagonal and non-diagonal disorder. Some conclusions are drawn on the role of molecular polarization on the dynamics of an extra charge in acenes.

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