Charge transport in mixed CdSe and CdTe colloidal nanocrystal films

Author(s)
Bawendi, Moungi G.; Geyer, Scott Mitchell; Porter, Venda J.; Halpert, Jonathan E.; Mentzel, Tamar; ... Show more
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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.
Date issued
2010-10
URI
http://hdl.handle.net/1721.1/60897
Department
Massachusetts Institute of Technology. Department of Chemistry; Massachusetts Institute of Technology. Department of Physics
Journal
Physical Review B
Publisher
American Physical Society
Citation
Geyer, Scott et al. “Charge transport in mixed CdSe and CdTe colloidal nanocrystal films.” Physical Review B 82.15 (2010): 155201. © 2010 The American Physical Society.
Version: Final published version
ISSN
1098-0121
1550-235X
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