Paper Title:
Improved Thermoelectrics Based on Bismuth and Antimony Chalcogenides for Temperatures below 240 K
  Abstract

Thermoelectric and galvanomagnetic properties for solid solution based on bismuth and antimony chalcogenides were studied for the optimal compositions and carrier concentrations in the temperature interval 100-240 K. Galvanomagnetic properties were analyzed in the framework of the many–valley energy spectrum model with isotropic and anisotropic scattering of charge carries. The figure-of-merit is shown to be determined with optimal relations between the values of the density-of-states effective mass, the carrier mobility taking into account degeneration of charge carriers, and the lattice thermal conductivity. The figure-of-merit also depends on anisotropy of the constant energy surface and scattering mechanism. Average values of the figure-of-merit through the temperature interval 100-240 K are equal to (2.5-2.65) 10-3 K1 for optimal compositions and carrier concentrations.

  Info
Periodical
Edited by
Pietro VINCENZINI, Kunihito KOUMOTO, Nicola ROMEO and Mark MEHOS
Pages
77-82
DOI
10.4028/www.scientific.net/AST.74.77
Citation
L. N. Lukyanova, V. A. Kutasov, P. P. Konstantinov, V. V. Popov, "Improved Thermoelectrics Based on Bismuth and Antimony Chalcogenides for Temperatures below 240 K", Advances in Science and Technology, Vol. 74, pp. 77-82, 2010
Online since
October 2010
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