Solubility study of Yb in n -type skutterudites Ybx Co4 Sb12 and their enhanced thermoelectric properties

J. Yang; Q. Hao; H. Wang; Y. C. Lan; Q. Y. He; A. Minnich; D. Z. Wang; J. A. Harriman; V. M. Varki; M. S. Dresselhaus; G. Chen; Z. F. Ren

doi:10.1103/PhysRevB.80.115329

Solubility study of Yb in n -type skutterudites Ybx Co4 Sb12 and their enhanced thermoelectric properties

J. Yang
, Q. Hao
, H. Wang
, Y. C. Lan
, Q. Y. He
, A. Minnich
, D. Z. Wang
, J. A. Harriman
, V. M. Varki
, M. S. Dresselhaus
, G. Chen
, Z. F. Ren

Research output: Contribution to journal › Article › peer-review

115 Scopus citations

Abstract

The solubility of Yb in Ybx Co4 Sb12 was reported to be 0.19 in bulk skutterudites made by melting and slow cooling method. Surprisingly we increased x close to 0.5 by a special sample preparation method: ball mill and hot press. We show that a higher Yb concentration not only increases the power factor due to a higher electron concentration but also reduces the thermal conductivity k because of stronger phonon scattering. In this way, we have achieved a dimensionless thermoelectric figure of merit ZT of about 1.2 at 550°C in Yb0.35 Co4 Sb12.

Original language	English (US)
Article number	115329
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	80
Issue number	11
DOIs	https://doi.org/10.1103/PhysRevB.80.115329
State	Published - Sep 29 2009
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.80.115329

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Yang, J., Hao, Q., Wang, H., Lan, Y. C., He, Q. Y., Minnich, A., Wang, D. Z., Harriman, J. A., Varki, V. M., Dresselhaus, M. S., Chen, G., & Ren, Z. F. (2009). Solubility study of Yb in n -type skutterudites Ybx Co4 Sb12 and their enhanced thermoelectric properties. Physical Review B - Condensed Matter and Materials Physics, 80(11), Article 115329. https://doi.org/10.1103/PhysRevB.80.115329

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title = "Solubility study of Yb in n -type skutterudites Ybx Co4 Sb12 and their enhanced thermoelectric properties",

abstract = "The solubility of Yb in Ybx Co4 Sb12 was reported to be 0.19 in bulk skutterudites made by melting and slow cooling method. Surprisingly we increased x close to 0.5 by a special sample preparation method: ball mill and hot press. We show that a higher Yb concentration not only increases the power factor due to a higher electron concentration but also reduces the thermal conductivity k because of stronger phonon scattering. In this way, we have achieved a dimensionless thermoelectric figure of merit ZT of about 1.2 at 550°C in Yb0.35 Co4 Sb12.",

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AU - Yang, J.

AU - Hao, Q.

AU - Wang, H.

AU - Lan, Y. C.

AU - He, Q. Y.

AU - Minnich, A.

AU - Wang, D. Z.

AU - Harriman, J. A.

AU - Varki, V. M.

AU - Dresselhaus, M. S.

AU - Chen, G.

AU - Ren, Z. F.

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AB - The solubility of Yb in Ybx Co4 Sb12 was reported to be 0.19 in bulk skutterudites made by melting and slow cooling method. Surprisingly we increased x close to 0.5 by a special sample preparation method: ball mill and hot press. We show that a higher Yb concentration not only increases the power factor due to a higher electron concentration but also reduces the thermal conductivity k because of stronger phonon scattering. In this way, we have achieved a dimensionless thermoelectric figure of merit ZT of about 1.2 at 550°C in Yb0.35 Co4 Sb12.

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Solubility study of Yb in n -type skutterudites Ybx Co4 Sb12 and their enhanced thermoelectric properties

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