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CoGe1.5Se1.5: Synthesis and characterization

Published online by Cambridge University Press:  01 February 2011

R. Ertenberg ,
M. Beekman ,
J. Martin ,
G. Fowler  and
G.S. Nolas
R. Ertenberg
Affiliation:
Department of Physics, University of South Florida, Tampa, FL 33620
M. Beekman
Affiliation:
Department of Physics, University of South Florida, Tampa, FL 33620
J. Martin
Affiliation:
Department of Physics, University of South Florida, Tampa, FL 33620
G. Fowler
Affiliation:
Department of Physics, University of South Florida, Tampa, FL 33620
G.S. Nolas
Affiliation:
Department of Physics, University of South Florida, Tampa, FL 33620
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Abstract

Polycrystalline CoGe1.5Se1.5 was synthesized and characterized. The compound is a member of the class of compounds with the skutterudite crystal structure. Synthesis assuming the above stoichiometry resulted in a n-type semiconductor with composition CoGe1.452Se1.379. The specimen exhibits a large room temperature Seebeck coefficient and resistivity. The electron mobility is very low and the thermal conductivity is lower than that of the binary skutterudite CoSb3. These properties can be attributed to the vacancies in the crystal lattice due to the non-stoichiometric nature of the specimen. The potential for thermoelectric applications of ternary skutterudites is also discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 793: Symposium S – Thermoelectric Materials 2003 - Research and Applications , 2003 , S8.15
Copyright
Copyright © Materials Research Society 2004

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References

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