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Synthesis and Characterization of Cd1−xCuxSe Quantum Dots

Published online by Cambridge University Press:  01 February 2011

Khalid M. Hanif  and
Geoffrey F. Strouse
Khalid M. Hanif
Affiliation:
Department of Chemistry & Biochemistry, University of California, Santa Barbara, CA 93106–9510, U.S.A.
Geoffrey F. Strouse
Affiliation:
Department of Chemistry & Biochemistry, University of California, Santa Barbara, CA 93106–9510, U.S.A.
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Abstract

Cu:CdSe nanoparticle alloys were synthesized using inorganic cluster precursor via a lyothermal method. The dots synthesized were approximately 4 nm in size and exhibited doping levels as high as 20% for Cu(I). Cu(I) cations are randomly doped on the Cd-Td site based on a Vegard's law analysis, suggesting that doping arises from a random ion substitution mechanism. The resulting dots exhibited essentially no band edge photoluminescence due to a high level of trap site inclusions in these materials resulting from Se vacancy formation in order to compensate for the Cu+ replacing a Cd2+ ion. Se vacancy formation is evident in the XPS analysis of the Cd:Cu:Se ratios for these materials.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 789 , 2003 , N4.3
Copyright
Copyright © Materials Research Society 2004

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References

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