Excitons in molecular J-aggregates of cyanine dyes: Simulation of trapping and energy transfer - Archive ouverte HAL
Article Dans Une Revue Journal of Luminescence Année : 2008

Excitons in molecular J-aggregates of cyanine dyes: Simulation of trapping and energy transfer

Résumé

A theoretical model is provided to simulate the energy transfer and trapping of excitons in cyanine J-aggregates for various geometrical configurations. Intermolecular interactions are calculated using the extended dipole method. Frenkel exciton states are obtained by a numerical diagonalization of the aggregate Hamiltonian taking into account the static disorder. A model of exciton-phonon coupling is used to describe the trapping and the energy transfer processes among the exciton states. Scattering rates are calculated and used in a Master Equation to obtain the time evolution of the excitonic populations after initial excitation. Configurationally averaged absorption lineshapes and time-resolved fluorescence decays are obtained. Our simulation model is applied to describe the excitation energy transfer between two closely spaced linear chains of pseudoisocyanine (PIC) molecules and to a two-dimensional monolayer composed of a mixing of oxacyanine and thiacyanine molecules. (c) 2007 Elsevier B.V. All rights reserved.

Dates et versions

hal-01287858 , version 1 (14-03-2016)

Identifiants

Citer

Jean-Pierre Lemaistre. Excitons in molecular J-aggregates of cyanine dyes: Simulation of trapping and energy transfer. Journal of Luminescence, 2008, 128 (5-6), pp.874-876. ⟨10.1016/j.jlumin.2007.11.006⟩. ⟨hal-01287858⟩
34 Consultations
0 Téléchargements

Altmetric

Partager

More