Abstract
We report the influence of trap states on charge transport through films of mixed CdTe and CdSe nanocrystals (NCs) between lateral electrodes, through layered films of CdTe and CdSe NCs in a layered geometry, and through films of CdTe/CdSe nanobarbells in a layered geometry. We find that an electron trapping state on the surface of the CdTe NCs dominates the conduction in all devices studied. X-ray photoelectron spectroscopy and thermal activation studies implicate unpassivated or oxidized Te as the electron-trapping site.
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