| Abstract
| - Investigations of charge transport mechanisms in thin CdSe nanoparticles films deposited on silicon, usingsurface photovoltage and chemically resolved electrical measurements, reveal a strongly nonlinear opticalresponse and a negative differential resistance. Here, both phenomena are rationalized within a phenomenological model consisting of two spatially separated types of traps, one related to the CdSe nanoparticles and theother to the nanoparticle/substrate interface. The model successfully explains a broad range of both old andnew experimental observations and is used as a numerical framework for showing how the interplay betweenhole and electron processes dominates the photoelectrical properties of nanoparticle films.
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