Charge separation in molecular compounds from the charge transfer states

Darius Abramavicius; Vidmantas Gulbinas; Leonas Valkunas

doi:10.1117/12.425482

10 April 2001 Charge separation in molecular compounds from the charge transfer states

Darius Abramavicius, Vidmantas Gulbinas, Leonas Valkunas

Proceedings Volume 4415, Optical Organic and Inorganic Materials; (2001) https://doi.org/10.1117/12.425482
Event: Advanced Optical Materials and Devices, 2000, Vilnius, United States

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.

Citation Download Citation

Darius Abramavicius, Vidmantas Gulbinas, and Leonas Valkunas "Charge separation in molecular compounds from the charge transfer states", Proc. SPIE 4415, Optical Organic and Inorganic Materials, (10 April 2001); https://doi.org/10.1117/12.425482

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