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VOLUME 82 (2005) | ISSUE 6 | PAGE 407
Vibrational enhancement of the effective donor - acceptor Coupling
PACS: 34.70.+e, 73.40.Gk, 82.39.Jn
Abstract
The paper deals with a simple three sites model for charge transfer phenomena in an one-dimensional donor (D) - bridge (B) - acceptor (A) system coupled with vibrational dynamics of the B site. It is found that in a certain range of parameters the vibrational coupling leads to an enhancement of the effective donor - acceptor electronic coupling as a result of the formation of the polaron on the B site. This enhancement of the charge transfer efficiency is maximum at the resonance, where the effective energy of the fluctuating B site coincides with the donor (acceptor) energy.