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 | |
| State | Published - Sep 29 2009 |
| Externally published | Yes |
Fingerprint
ASJC Scopus subject areas
- Condensed Matter Physics
- Electronic, Optical and Magnetic Materials
Cite this
Solubility study of Yb in n -type skutterudites Ybx Co4 Sb12 and their enhanced thermoelectric properties. / Yang, J.; Hao, Qing; 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.
In: Physical Review B - Condensed Matter and Materials Physics, Vol. 80, No. 11, 115329, 29.09.2009.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Solubility study of Yb in n -type skutterudites Ybx Co4 Sb12 and their enhanced thermoelectric properties
AU - Yang, J.
AU - Hao, Qing
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.
PY - 2009/9/29
Y1 - 2009/9/29
N2 - 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.
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.
UR - http://www.scopus.com/inward/record.url?scp=70350586440&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=70350586440&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.80.115329
DO - 10.1103/PhysRevB.80.115329
M3 - Article
AN - SCOPUS:70350586440
VL - 80
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 0163-1829
IS - 11
M1 - 115329
ER -