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Title: Cu Doping in Ligand Free CdS Nanocrystals: Conductivity and Electronic Structure Study
Authors: Grandhi, G. Krishnamurthy
Swathi, K.
Narayan, K. S.
Viswanatha, Ranjani
Keywords: Physical Chemistry
Nanoscience & Nanotechnology
Materials Science
Atomic, Molecular & Chemical Physics
Inorganic Colloidal Nanocrystals
Vi Semiconductor Nanocrystals
Quantum-Dot Solids
ZnO Nanocrystals
Issue Date: 2014
Publisher: American Chemical Society
Citation: Grandhi, GK; Swathi, K; Narayan, KS; Viswanatha, R, Cu Doping in Ligand Free CdS Nanocrystals: Conductivity and Electronic Structure Study. Journal of Physical Chemistry Letters 2014, 5 (13) 2382-2389,
Journal of Physical Chemistry Letters
Abstract: Ligand-free Cu-doped CdS nanocrystals (NCs) have been synthesized to elucidate their surface electronic structure. The Cu-doped ligand-free NCs unlike their undoped counterparts are shown to be luminescent. We used this Cu-related emission as a probe to study the nature of the surface trap states that results in negligible luminescence in the undoped NCs. The concentration of the sulfide ligands is shown to play a crucial role in the surface passivation of the NCs. Electrical conductivity of these NCs was also studied, and they were shown to exhibit significant conductivity of similar to 10(-4) S cm(-1). Further we have shown that the electrical conductivity is closely correlated to the surface charge and hence the trap states of the individual NCs have far-reaching consequences in the device optimization.
Description: Restricted Access
ISSN: 1948-7185
Appears in Collections:Research Articles (Narayan K. S.)
Research Papers (Ranjani Viswanatha)

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