High thermoelectric efficiency in co-doped degenerate p-type PbTe

Abstract

We explored the effect of K and K-Na substitution for Pb atoms in the lattice of PbTe, in an effort to test a hypothesis for the development of a resonant state that may enhance the thermoelectric power. At 300K the data can adequately be explained by a combination of a single and two-band model for the valence band of PbTe depending on hole density that varies in the range 1-15 × 1019 cm-3. A change in scattering mechanism was observed in the temperature dependence of the electrical conductivity, σ, for samples concurrently doped with K and Na which results in significantly enhanced σ at elevated temperatures and hence power factors. Thermal conductivity data provide evidence of a strong interaction between the light- and the heavy-hole valence bands at least up to 500K. Figure of merits as high as 1.3 at 700K were measured as a result of the enhanced power factors.

This is a preview of subscription content, access via your institution.

References

  1. 1

    K-F. Hsu S. Loo F. Guo W. Chen J. S. Dyck C. Uher T. Hogan E. K. Polychroniadis M. G. Kanatzidis Science 303 818 (2004)

    CAS  Article  Google Scholar 

  2. 2

    P. F. P. Poudeu J. D’Angelo, A. D. Downey J. L. Short T. P. Hogan M. G. Kanatzidis Angew. Chem. Int. Ed. 45 3835 (2006)

    CAS  Article  Google Scholar 

  3. 3

    J. Androulakis K. F. Hsu R. Pcionek H. Kong C. Uher J. J. D’Angelo, A. Downey T. Hogan, M. Kanatzidis Adv. Mater. 18 1170 (2006)

    CAS  Article  Google Scholar 

  4. 4

    J. Androulakis C.-H. Lin H.-J. Kong C. Uher C.-I. Wu T. Hogan B. A. Cook T. Caillat, K. M. Paraskevopoulos and M. G. Kanatzidis J. Am. Chem. Soc. 129 9780, (2007)

    CAS  Article  Google Scholar 

  5. 5

    J. P. Heremans V. Jovovic E. S. Toberer A. Saramat K. Kurosaki A. Charoenphakdee S. Yamanaka G. J. Snyder Science 321, 554 (2008)

    CAS  Article  Google Scholar 

  6. 6

    S. Ahmad S. D. Mahanti Khang Hoang, and M. G. Kanatzidis Phys. Rev. B 74 155205 (2006)

    Article  Google Scholar 

  7. 7

    S. A. Nemov Y. I. Ravich Sov. Phys. Usp. 41, 735 (1998)

    Article  Google Scholar 

  8. 8

    K. Ahn M. Han J. He J. Androulakis S. Ballikaya C. Uher V. P. Dravid and M. G. Kanatzidis, J. Am. Chem. Soc. accepted

  9. 9

    Y. I. Ravich CRC Handbook of Thermoelectrics Thermoelectrics, edited by D. M. Rowe (CRC press, 1995) ch. 7

    Google Scholar 

  10. 10

    C. M. Jaworski J. Tobola E. M. Levin K. Schmidt-Rohr, and J. P. Heremans Phys. Rev. B 80 125208 (2009)

    Article  Google Scholar 

  11. 11

    S. V. Airapetyants M. N. Vinogradova I. N. Dubrovskaya N. V. Kolomoets and I. M. Rudnik, Sov. Phys. Solid State 8, 1069 (1966)

    Google Scholar 

  12. 12

    N. V. Kolomoets M. N. Vinogradova and L. M. Sysoeva Sov. Phys. Semicond. 1, 1020, (1968)

    Google Scholar 

Download references

Author information

Affiliations

Authors

Corresponding author

Correspondence to John Androulakis.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Androulakis, J., Todorov, I., Chung, DY. et al. High thermoelectric efficiency in co-doped degenerate p-type PbTe. MRS Online Proceedings Library 1267, 403 (2010). https://doi.org/10.1557/PROC-1267-DD04-03

Download citation