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Investigation of the thermoelectric properties of the PbTe-SrTe system

Published online by Cambridge University Press:  01 February 2011

Kanishka Biswas ,
Jiaqing He ,
Qichun Zhang ,
Guoyu Wang ,
Ctirad Uher ,
Vinayak P Dravid  and
Mercouri Kanatzidis
Kanishka Biswas
Affiliation:
[email protected], Northwestern University, Department of Chemistry, Evanston, Illinois, United States
Jiaqing He
Affiliation:
[email protected], Northwestern University, Department of Chemistry, Evanston, Illinois, United States
Qichun Zhang
Affiliation:
[email protected], Northwestern University, Department of Chemistry, Evanston, Illinois, United States
Guoyu Wang
Affiliation:
[email protected], University of Michigan, Department of Physics, Ann Arbor, Michigan, United States
Ctirad Uher
Affiliation:
[email protected], University of Michigan, Department of Physics, Ann Arbor, Michigan, United States
Vinayak P Dravid
Affiliation:
[email protected], Northwestern University, Materials Science and Engineering, Evanston, Illinois, United States
Mercouri Kanatzidis
Affiliation:
[email protected], Northwestern University, Department of Chemistry, Evanston, Illinois, United States
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Abstract

PbTe-based materials are promising for efficient heat energy to electricity conversion. We present studies of the thermoelectric properties of the PbTe-SrTe system. X-ray diffraction patterns reveal that all the samples crystallize in the rock salt structure without noticeable secondary phase. Na2Te doping of the PbTe-SrTe materials resulting in a positive sign Hall coefficient indicating p-type conduction. Lattice thermal conductivity is significantly decreased with the insertion of SrTe in PbTe lattice. The ZT ∼ 1.3 of these materials is derived from their very low thermal conductivities and reasonably high power factor at 800 K.

Keywords

thermoelectricelectrical propertiesthermal conductivity
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1267: Symposium DD – Thermoelectric Materials 2010-Growth, Properties, Novel Characterization Methods and Applications , 2010 , 1267-DD06-05
Copyright
Copyright © Materials Research Society 2010

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