Abstract

Based on a generalized theory of charge transport in organic crystals we investigate themotion of polarons of arbitrary size. Within this theory, we analyze the influence ofcharacteristic electronic, vibronic, and thermal energies and their role for the transportregimes. The polaron bandwidth is identified as the central temperature-dependentquantity. The size of the dressed charge carriers is used to analyze the correlation betweenthe polaron size and transport mechanism. In addition, we propose that the band andhopping transport can be distinguished by investigating the mobility anisotropy.To do this only electronic structure parameters are necessary for comparison.

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