In photosynthesis photons collected by Light-Harvesting complexes (LHC) are transferred to the Reaction Center (RC) where energy is converted into a charge separated state with almost 100％ efficiency.Excitation creates collective excited states (excitons) that provide fast energy transfer.In the RC excitons are mixed with charge transfer (CT) character, which provides fast charge separation.However, both LHC and RC have to cope with disorder i.e.