Diffusion and trapping of excitations in disordered systems

Abstract

The diffusion and trapping of excitations in disordered systems is considered. The problem is treated in the framework of the master equation using the Forster transfer mechanism. The diffusion and trapping equations are solved using a self-consistent effective-medium approach for which analytic results can be presented. The results are compared with experimental data on fluorescence quenching in solutions of chlorophyll.