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Thermoelectric Properties of the Nanostructured NaPb18-xSnxMTe20 (M=Sb, Bi) Materials

Published online by Cambridge University Press:  01 February 2011

Aurelie Gueguen ,
Pierre Ferdinand Poudeu Poudeu ,
Robert Pcionek ,
Huijun Kong ,
Ctirad Uher  and
Mercouri G. Kanatzidis
Aurelie Gueguen
Affiliation:
a-gueguen@northwestern.edu, Northwestern University, Chemistry, 2145 Sheridan road, Evanston, IL, 60208-6113, United States
Pierre Ferdinand Poudeu Poudeu
Affiliation:
f-poudeu@northwestern.edu, Northwestern University, Chemistry, Evanston, IL, 60208, United States
Robert Pcionek
Affiliation:
pcionekr@msu.edu, Michigan State University, Chemistry, East Lansing, MI, 48824, United States
Huijun Kong
Affiliation:
huijunk@umich.edu, University of Michigan, Physics, Ann Arbor, MI, 48109, United States
Ctirad Uher
Affiliation:
cuher@umich.edu, University of Michigan, Physics, Ann Arbor, MI, 48109, United States
Mercouri G. Kanatzidis
Affiliation:
m-kanatzidis@northwestern.edu, Northwestern University, Chemistry, Evanston, IL, 60208, United States
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Abstract

The thermoelectric properties of materials with compositions NaPb18-xSnxMTe20 (M=Sb, Bi, x=0, 3, 5, 9, 13, 16 and 18) were investigated in the temperature range 300-670K. All compositions exhibited p-type behavior over the measured temperature range. Electronic properties and transport were tuned through the manipulation of the Pb/Sn ratio. Increasing the Sn fraction results in an increase in electrical conductivity and a decrease in thermopower. The compositions NaPb13Sn5SbTe20 and NaPb9Sn9SbTe20 show a lattice thermal conductivity of ∼1 W/m/K at room temperature.

Keywords

thermoelectricitysemiconductingTe
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1044: Symposium U – Thermoelectric Power Generation , 2007 , 1044-U08-05
Copyright
Copyright © Materials Research Society 2008

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