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Flux Synthesis of New Multinary Bismuth Chalcogenides and their Thermoelectric Properties

Published online by Cambridge University Press:  10 February 2011

Duck-Young Chung ,
Kyoung-Shin Choi ,
Paul W. Brazis ,
Carl R. Kannewurf  and
Mercouri G. Kanatzidis
Duck-Young Chung
Affiliation:
Department of Chemistry and Center for Fundamental Materials Research, Michigan State University, East Lansing, MI 48824
Kyoung-Shin Choi
Affiliation:
Department of Chemistry and Center for Fundamental Materials Research, Michigan State University, East Lansing, MI 48824
Paul W. Brazis
Affiliation:
Department of Electrical and Computer Engineering, Northwestern University, Evanston, IL 60208
Carl R. Kannewurf
Affiliation:
Department of Electrical and Computer Engineering, Northwestern University, Evanston, IL 60208
Mercouri G. Kanatzidis
Affiliation:
Department of Chemistry and Center for Fundamental Materials Research, Michigan State University, East Lansing, MI 48824
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Abstract

We present the synthesis and structure of the new chalcogenide compounds, Rb0.5Bi1.83Te3, APb2Bi3Te7 (A = Cs, Rb), K1.25Pb3.50Bi7.25Se15 and A1+xPb4−2xSb7+xSe15 (A = K, Rb). The layered structures of the first two telluride compounds are related to each other in a very interesting fashion. These compounds are n-type metallic conductors and solid solutions with Se and Sb have also been synthesized. K1.25Pb3.50Bi7.25Se15 and its Sb analogs have a complex three-dimensional structure composed of NaCl- and Bi2Te3-type building units. The thermal stability, melting behavior, electrical conductivity and thermopower of these compounds are reported.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 545: Symposium Z – Thermoelectric Materials 1998 - The Next Generation… , 1998 , 65
Copyright
Copyright © Materials Research Society 1999

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