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Thermoelectric Properties of Composite PbTe – PbSnS2 Materials

Published online by Cambridge University Press:  01 February 2011

Steven N Girard
Affiliation:
s-girard@northwestern.edu, Northwestern University, Chemistry, 2145 Sheridan Rd., Evanston, Illinois, 60208-3113, United States
Jiaqing He
Affiliation:
jiaqing-he@northwestern.edu, Northwestern University, Materials Science and Engineering, Evanston, Illinois, United States
Vinayak P Dravid
Affiliation:
v-dravid@northwestern.edu, Northwestern University, Materials Science and Engineering, Evanston, Illinois, United States
Mercouri Kanatzidis
Affiliation:
m-kanatzidis@northwestern.edu, Northwestern University, Chemistry, Evanston, Illinois, United States
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Abstract

The thermoelectric (Pb1-mSnmTe)1-x(PbS)x where m = 0.05 and x = 0.08 has been shown to produce PbS nanostructures that effectively scatter phonons, enhancing ZT. As Sn substitution is increased, a new phase of PbSnS2 precipitates. We find that incorporation of PbSnS2 in PbTe results in a significant reduction in lattice thermal conductivity around 0.6 W/mK at room temperature. We present preliminary characterization and thermoelectric properties.

Type
Research Article
Copyright
Copyright © Materials Research Society 2010

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