Charge transport in colloidal ZnO nanocrystal solids: The significance of surface states
- Institute of Advanced Materials, Nanjing Tech University, Nanjing 211816 (China)
We investigate charge transport behaviour in colloidal ZnO nanocrystal solids with different surface states. Our results show that the logarithm of the conductivity scales with −T{sup −1/4}, suggestive of Mott variable-range hopping. Analysis of the density of states at the Femi level suggests that the charge hopping occurs through surface or defect states, rather than by direct hopping between quantum-confined conduction band states of the nanocrystals.
- OSTI ID:
- 22273393
- Journal Information:
- Applied Physics Letters, Vol. 104, Issue 19; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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