Simulation of energy transfer in disordered two-dimensional mixed J-aggregates

Jean-Pierre Lemaistre (1)

1 INSP - Institut des Nanosciences de Paris

A theoretical model, based on numerical simulations, is provided to analyze the energy transfer in a two-dimensional mixed J-aggregate. The J-aggregate is modeled as a square arrangement of parallel donor molecules in which a given concentration of acceptors is randomly substituted. The Frenkel exciton states are calculated by numerical diagonalization of the aggregate Hamiltonian including the static disorder. The scattering rates are calculated using a model of exciton-phonon coupling. The concentration dependences of the absorption and fluorescence line shapes, the localization behavior of the exciton states and the time-resolved fluorescence decays (configurationally averaged) are obtained. The simulations are checked against recent experimental results on mixed J-aggregates of cyanine dyes. (c) 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

Domaines: Matière Condensée [cond-mat]

Jean-Pierre Lemaistre. Simulation of energy transfer in disordered two-dimensional mixed J-aggregates. 7th International Conference on Excitonic Processes in Condensed Matter (EXCON 2006), Jun 2006, Winston Salem, Unknown Region. pp.3394-3399, ⟨10.1002/pssc.200672135⟩. ⟨hal-01288175⟩