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Initial Assessment of the Thermoelectric Properties for the Mixed System K2−xRbxBi8Se13

Published online by Cambridge University Press:  21 March 2011

John R. Ireland ,
Theodora Kyratsi ,
Mercouri G. Kanatzidis  and
C. R. Kannewurf
John R. Ireland
Affiliation:
Dept. of Electrical and Computer Engineering, Northwestern University, Evanston, IL, 60208-3118, U.S.A
Theodora Kyratsi
Affiliation:
Dept. of Chemistry and Center for Fundamental Materials Research, Michigan State University, East Lansing, MI, 48824-1322, U.S.A
Mercouri G. Kanatzidis
Affiliation:
Dept. of Chemistry and Center for Fundamental Materials Research, Michigan State University, East Lansing, MI, 48824-1322, U.S.A
C. R. Kannewurf
Affiliation:
Dept. of Electrical and Computer Engineering, Northwestern University, Evanston, IL, 60208-3118, U.S.A
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Abstract

In previous studies we have investigated the thermoelectric properties of undoped and doped compositions of β-K2Bi8Se13. The attempt to substitute Rb for K resulted in a different structure type, but with potentially useful thermal properties. In this paper the results of measuring the thermoelectric properties of small crystalline samples for K2−xRbxBi8Se13 solid solutions are reported for the compositional ranges with 0 ≤ × ≤ 1 and with 1.8 ≤ × ≤ 2. The presence of rubidium provides a significant improvement in the thermopower but has much less of an effect on the electrical conductivity. The combined results are reflected in the power factor behavior as a function of temperature.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 691: Symposium G – Thermoelectric Materials 2001--Research and Applications , 2001 , G13.4
Copyright
Copyright © Materials Research Society 2002

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References

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