Jump to main content
Jump to site search

Issue 48, 2014
Previous Article Next Article

SnTe–AgBiTe2 as an efficient thermoelectric material with low thermal conductivity

Author affiliations

Abstract

SnTe is an intriguing alternative to its sister compound PbTe in thermoelectric energy conversion because of their electronic and structural similarity; however, it is challenging to optimize its thermoelectric performance to the level of PbTe because of the difficulties in decreasing its intrinsically large hole population and high thermal conductivity arising from the tin vacancies. We demonstrate here that by alloying some AgBiTe2 in SnTe, thus forming AgSnxBiTex+2 compositions the hole concentration can be duly decreased because of the high efficiency of Bi as an electron donor. The lattice thermal conductivity is also decreased due to the strong scattering of phonons (by point defect scattering as well as Ag-rich nanostructures) to achieve a value of ∼0.7 W m−1 K−1 at ∼750 K. As a result, a high thermoelectric figure ZT of merit of ∼1.1 at 775 K is achieved by chemical composition optimization (×∼15), making lead free SnTe–AgBiTe2 a promising thermoelectric material.

Graphical abstract: SnTe–AgBiTe2 as an efficient thermoelectric material with low thermal conductivity

Back to tab navigation

Supplementary files

Publication details

The article was received on 16 Oct 2014, accepted on 16 Oct 2014 and first published on 10 Nov 2014


Article type: Paper
DOI: 10.1039/C4TA05530F
Author version available: Download Author version (PDF)
Citation: J. Mater. Chem. A, 2014,2, 20849-20854
  •   Request permissions

    SnTe–AgBiTe2 as an efficient thermoelectric material with low thermal conductivity

    G. Tan, F. Shi, H. Sun, L. Zhao, C. Uher, V. P. Dravid and M. G. Kanatzidis, J. Mater. Chem. A, 2014, 2, 20849
    DOI: 10.1039/C4TA05530F

Search articles by author

Spotlight

Advertisements