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Thermoelectric Figure of Merit, ZT, of Single Crystal Pentatellurides (MTe5-XSex: M = Hf, Zr and x = 0, 0.25)

Published online by Cambridge University Press:  01 February 2011

R. T. Littleton IV ,
Terry M. Tritt ,
B. Zawilski ,
J. W. Kolis ,
D. R. Ketchum  and
M. Brooks Derrick
R. T. Littleton IV
Affiliation:
Materials Science and Engineering Department, Clemson University, Clemson, SC 29634, USA
Terry M. Tritt
Affiliation:
Materials Science and Engineering Department, Clemson University, Clemson, SC 29634, USA Department of Physics and Astronomy, Clemson University, Clemson, SC 29634, USA
B. Zawilski
Affiliation:
Department of Physics and Astronomy, Clemson University, Clemson, SC 29634, USA
J. W. Kolis
Affiliation:
Materials Science and Engineering Department, Clemson University, Clemson, SC 29634, USA Department of Chemistry, Clemson University, Clemson, SC 29634, USA
D. R. Ketchum
Affiliation:
Department of Chemistry, Clemson University, Clemson, SC 29634, USA
M. Brooks Derrick
Affiliation:
Department of Chemistry, Clemson University, Clemson, SC 29634, USA
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Abstract

The thermoelectric figure of merit, ZT = α2σT/λ, has been measured for pentatelluride single crystals of HfTe5, ZrTe5, as well as Se substituted pentatellurides. The parent materials, HfTe5 and ZrTe5, exhibit relatively large p- and n- type thermopower, |a| > 125 μV/K, and low resistivity, ρ ≤ 1 mΩ•cm. These values lead to a large power factor (α2σT) which is substantially increased with proper Se substitution on the Te sites. The thermal conductivity of these needle-like crystals has also been measured as a function of temperature from 10 K ≤ T ≤ 300 K. The room temperature figure of merit for these materials varies from ZT “0.1 for the parent materials to ZT ≈ 0.25 for Se substituted samples. These results as well as experimental procedures will be presented and discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 626: Symposium Z – Thermoelectric Materials 2000 - The Next Generation Materials for Small-Scale Refrigeration and Power Generation Applications , 2000 , Z3.1
Copyright
Copyright © Materials Research Society 2000

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References

REFERENCES

1. DiSalvo, F. J., Science, 285, 703–6 (1999).Google Scholar
2. Chung, D. Y., Hogan, T., Brazis, P., Rocci-Lane, M., Kannewurf, C., Bastea, M., Uher, C., and Kanatzidis, M. G., Science, 287, 1024–7 (2000.)Google Scholar
3. Tritt, T. M., Science, 283, 804–5 (1999).Google Scholar
4. New Materials and Performance Limits for Thermoelectric Cooling, Slack, G. A., in CRC Handbook of Thermoelectrics, Rowe ed. p 407–4 (1995).Google Scholar
5. Littleton, R. T., Kolis, J. W., Feger, C. R. and Tritt, T.M., MRS 1998: Thermoelectric Materials 1998. edited by Tritt, T. M. et. al. Vol. 545, p 381–396 (1998).Google Scholar
6. Littleton, R. T., Tritt, T. M., Feger, C. R., Kolis, J., Wilson, M. L., Marone, M., Payne, J., Verebeli, D., and Levy, F., Appl. Phys. Lett., 72, 2056–8 (1998).Google Scholar
7. Littleton, R. T., Tritt, T. M., Kolis, J. W., and Ketchum, D., Phys. Rev. B., 60, 13453–7 (1999).Google Scholar
8. Tritt, T. M., Lowhorn, N. D., Littleton, R. T., Pope, A., Feger, C. R., and Kolis, J. W., Phys. Rev. B., 60, 7816–9 (1999).Google Scholar
9. Levy, F. and Berger, H., J. Cryst. Growth, 61, 61–8 (1983).Google Scholar
10. Furuseth, S., Brattas, L., and Kjekshus, A., Acta. Chem. Scand., 27, 2367–2374 (1973).Google Scholar
11. Zawilski, B., Littleton, R. T., and Tritt, T. M., Rev. Sci. Instrum., in progress (2000).Google Scholar
12. Zawilski, B., Littleton, R. T., and Tritt, T. M., MRS, this proceeding, (2000).Google Scholar