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Polaron-exciton model for resonance energy transfer

By T. Markvart and R. Greef

Abstract

It is shown that Förster's expression for the electronic energy transfer rate can be recast in a form predicted for exciton motion that interacts strongly with molecular vibrations. Using a simple model based on the Kennard-Stepanov theory, Förster's expression for the spectral overlap is shown to be of a thermally activated form, as obtained previously by multiphonon theory. In contrast, the high-frequency internal vibrations contribute a factor which results from tunneling through a potential barrier between potential curves in the configuration coordinate diagram. We thus show that resonance energy transfer is equivalent to phonon-assisted hopping of a trapped excitonic polaron

Topics: QD, QC
Year: 2004
OAI identifier: oai:eprints.soton.ac.uk:22875
Provided by: e-Prints Soton

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