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Effects of temperature dependent chemical potential on the Seebeck coefficient of TiS2 thermoelectric material

Published online by Cambridge University Press:  14 March 2011

Tsunehiro Takeuchi ,
Akio Yamamoto  and
Koto Ogawa
Tsunehiro Takeuchi
Affiliation:
EcoTopia Science Institute, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan Department of Crystalline Materials Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
Akio Yamamoto
Affiliation:
Department of Crystalline Materials Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
Koto Ogawa
Affiliation:
Department of Crystalline Materials Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
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Abstract

The relation between chemical potential and Seebeck coefficient was investigated by using high-resolution angle resolved photoemission spectroscopy. The temperature dependence of chemical potential was experimentally determined for the n-type TiS2 thermoelectric material and compared with the measured Seebeck coefficient. We found that the temperature dependence of chemical potential of TiS2 is significantly large, and its effect on Seebeck coefficient is not negligible. This fact strongly indicates that the temperature dependence of chemical potential has to be properly understood to construct the guiding principle for developing new, practical thermoelectric materials.

Keywords

electronic structureelectrical propertiesthermoelectric
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1314: Symposium LL – Thermoelectric Materials for Solid-State Power Generation and Refrigeration , 2011 , mrsf10-1314-ll06-04
Copyright
Copyright © Materials Research Society 2011

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References

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