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Transport Behavior and Thermal Conductivity Reduction in the Composite System PbTe-Pb-Sb

Published online by Cambridge University Press:  01 February 2011

Joseph Sootsman ,
Huijun Kong ,
Ctirad Uher ,
Adam Downey ,
Jonathan James D'Angelo ,
Chun-I Wu ,
Timothy Hogan ,
Thierry Caillat  and
Mercouri Kanatzidis
Joseph Sootsman
Affiliation:
j-sootsman@northwestern.edu, Northwestern University, Chemistry, 2145 Sheridan Rd., Evanston, IL, 60208, United States
Huijun Kong
Affiliation:
huijunk@umich.edu, University of Michigan, Department of Physics, Ann Arbor, MI, 48109, United States
Ctirad Uher
Affiliation:
cuher@umich.edu, University of Michigan, Department of Physics, Ann Arbor, MI, 48109, United States
Adam Downey
Affiliation:
downeyad@egr.msu.edu, Michigan State University, Department of Electrical and Computer Engineering, East Lansing, MI, 48824, United States
Jonathan James D'Angelo
Affiliation:
dangelo4@msu.edu, Michigan State University, Department of Electrical and Computer Engineering, East Lansing, MI, 48824, United States
Chun-I Wu
Affiliation:
wuchuni@msu.edu, Michigan State University, Department of Electrical and Computer Engineering, East Lansing, MI, 48824, United States
Timothy Hogan
Affiliation:
hogant@egr.msu.edu, Michigan State University, Department of Electrical and Computer Engineering, East Lansing, MI, 48824, United States
Thierry Caillat
Affiliation:
thierry.caillat@jpl.nasa.gov, California Institute of Technology, Jet Propulsion Laboratory, Pasadena, CA, 91109, United States
Mercouri Kanatzidis
Affiliation:
m-kanatzidis@northwestern.edu, Northwestern University, Department of Chemistry, 2145 Sheridan Rd., Evanston, IL, 60208, United States
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Abstract

We report the synthesis of nanostructured composite PbTe with excess Pb and Sb metal inclusions. Scanning and transmission electron microscopy reveal these inclusions in both the nano- and macroscales. The electrical conductivity and Seebeck coefficient dependence on temperature show unusual trends which depend on the inclusion Pb/Sb ratio. Several ratios showed marked enhancements in power factor at 700 K. The thermal conductivity of these composites is reported.

Keywords

thermoelectricitynanostructureelectrical properties
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1044: Symposium U – Thermoelectric Power Generation , 2007 , 1044-U08-01
Copyright
Copyright © Materials Research Society 2008

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