Oxide Thermoelectrics

Conference · Tue Jan 01 00:00:00 EST 2008

OSTI ID:968246

Singh, David J ^[1]

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1. ORNL

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.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Energy Efficiency and Renewable Energy (EERE); USDOE Office of Science (SC); USDOE Laboratory Directed Research and Development (LDRD) Program
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 968246
• Resource Relation: Conference: MRS Fall Meeting, Boston, MA, USA, 20071126, 20071130
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
D STATES
ELECTRONIC STRUCTURE
SODIUM OXIDES
COBALT OXIDES
P STATES
THERMOELECTRICITY
TRANSPORT THEORY
BOLTZMANN EQUATION
CARRIER DENSITY