Threefold enhancement of the thermoelectric figure of merit for pressure tuned Sr8Ga16Ge30

J. F. Meng; N. V.Chandra Shekar; J. V. Badding; G. S. Nolas

doi:10.1063/1.1334366

Threefold enhancement of the thermoelectric figure of merit for pressure tuned Sr₈Ga₁₆Ge₃₀

J. F. Meng, N. V.Chandra Shekar, J. V. Badding, G. S. Nolas

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47 Scopus citations

Abstract

Semiconducting germanium clathrates are thermoelectric materials with cage-like structures that exhibit "phonon glass, electron crystal" behavior. We report an improvement by at least a factor of 3 in the dimensionless thermoelectric figure of merit for the clathrate semiconductor Sr₈Ga₁₆Ge₃₀ upon compression to 7 GPa. These results suggest that there is potential for further improving the thermoelectric properties of this material at ambient pressure by chemical or other methods.

Original language	English (US)
Pages (from-to)	1730-1733
Number of pages	4
Journal	Journal of Applied Physics
Volume	89
Issue number	3
DOIs	https://doi.org/10.1063/1.1334366
State	Published - Feb 1 2001

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1063/1.1334366

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AU - Meng, J. F.

AU - Shekar, N. V.Chandra

AU - Badding, J. V.

AU - Nolas, G. S.

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N2 - Semiconducting germanium clathrates are thermoelectric materials with cage-like structures that exhibit "phonon glass, electron crystal" behavior. We report an improvement by at least a factor of 3 in the dimensionless thermoelectric figure of merit for the clathrate semiconductor Sr8Ga16Ge30 upon compression to 7 GPa. These results suggest that there is potential for further improving the thermoelectric properties of this material at ambient pressure by chemical or other methods.

AB - Semiconducting germanium clathrates are thermoelectric materials with cage-like structures that exhibit "phonon glass, electron crystal" behavior. We report an improvement by at least a factor of 3 in the dimensionless thermoelectric figure of merit for the clathrate semiconductor Sr8Ga16Ge30 upon compression to 7 GPa. These results suggest that there is potential for further improving the thermoelectric properties of this material at ambient pressure by chemical or other methods.

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Threefold enhancement of the thermoelectric figure of merit for pressure tuned Sr₈Ga₁₆Ge₃₀

Abstract

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