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Proceedings Paper

Charge separation in molecular compounds from the charge transfer states
Author(s): Darius Abramavicius; Vidmantas Gulbinas; Leonas Valkunas
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Paper Abstract

New model explaining fast charge separation from the initially excited charge transfer (CT) states is presented in this paper. According to our suggestion a substantial dipole moment is localized in the CT complex after its optical excitation. Being a strong local perturbation this electronic dipole induces the changes in the equilibrium positions of atoms and molecules in the vicinity of its surrounding. Some particular modes are not overdamped at the very initial times while the rest of the modes evidently are responsible for the presence of the heat bath and thus for the energy dissipation. In the case when these specific modes are strongly coupled with the electronic subsystem, they can crate the driving force for the charge transfer via the feedback of the nonrelaxed environment. This model is demonstrated in the framework of the modified Marcus approach. Specific conditions for the oscillating behavior and relaxation rates in order to obtain the increase of the charge transfer is discussed.

Paper Details

Date Published: 10 April 2001
PDF: 9 pages
Proc. SPIE 4415, Optical Organic and Inorganic Materials, (10 April 2001); doi: 10.1117/12.425482
Show Author Affiliations
Darius Abramavicius, Institute of Physics (Lithuania)
Vidmantas Gulbinas, Institute of Physics (Lithuania)
Leonas Valkunas, Institute of Physics (Lithuania)

Published in SPIE Proceedings Vol. 4415:
Optical Organic and Inorganic Materials
Steponas P. Asmontas; Jonas Gradauskas, Editor(s)

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