Abstract

The exciton-phonon coupling is an very important process which determines the carrier mobility in organic crystals. By making some assumptions, the Hamiltonian be validate for organic molecular crystals. In the paper, the theory of carrier transport is extended to take weak quadratic coupling into account, and the diffusion constant be attained for a simple model. From the quadratic exciton-phonon coupling, we can get the analytical solution of carrier mobility in the organic molecular crystals. Experimentally, carrier mobility can be determined by various techniques.

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