Optimization of the thermoelectric properties of Ba8Ga 16Ge30

J. Martin; H. Wang; G. S. Nolas

doi:10.1063/1.2939438

Optimization of the thermoelectric properties of Ba₈Ga ₁₆Ge₃₀

J. Martin, H. Wang, G. S. Nolas

Nuclear Energy Materials Microanalysis

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Abstract

Polycrystalline Ba₈Ga₁₆Ge₃₀ clathrates with a systematic variation in the Ga:Ge stoichiometry were prepared to investigate the thermoelectric properties as a function of carrier concentration. Their corresponding transport properties were evaluated to identify the optimal carrier concentration for high temperature thermoelectric performance. These polycrystalline specimens demonstrate thermoelectric properties comparable to those obtained in single-crystal Ba₈Ga ₁₆Ge₃₀, confirming that polycrystalline clathrates can be optimized for high temperature thermoelectric applications.

Original language	English
Article number	222110
Journal	Applied Physics Letters
Volume	92
Issue number	22
DOIs	https://doi.org/10.1063/1.2939438
State	Published - 2008

Funding

The authors acknowledge support by GM and DOE under corporate agreement DE-FC26-04NT42278, and thank J. Salvador of GM for heat capacity measurement.

Funders	Funder number
U.S. Department of Energy	DE-FC26-04NT42278

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10.1063/1.2939438

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Optimization of the thermoelectric properties of Ba₈Ga ₁₆Ge₃₀

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