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Oxide Thermoelectrics

Published online by Cambridge University Press:  01 February 2011

David Joseph Singh
David Joseph Singh*
Affiliation:
singhdj@ornl.gov, Oak Ridge National Laboratory, Materials Science and Technology Div., 1 Bethel Valley Rd, Oak Ridge, TN, 37831-6114, United States, 865-241-3716
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Abstract

Thermoelectricity in oxides, especially NaxCoO2 and related materials, is discussed from the point of view of first principles calculations and Boltzmann transport theory. The electronic structure of this material is exceptional in that it has a combination of very narrow bands and strong hybridization between metal d states and ligand p states. As shown within the framework of conventional Boltzmann transport theory, this leads to high Seebeck coefficients even at metallic carrier densities. This suggests a strategy of searching for other narrow band oxides that can be doped metallic with mobile carriers. Some possible avenues for finding such materials are suggested.

Keywords

thermoelectricityoxideelectronic structure
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1044: Symposium U – Thermoelectric Power Generation , 2007 , 1044-U02-05
Copyright
Copyright © Materials Research Society 2008

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