Abstract
The band gap E g of a number of new thermoelectric materials, such as skutterudites, clathrates, Heusler phases, (Ge,Sn,Pb)(Te,Se)] m [(Bi,Sb)2(Te,Se)3] n (m, n = 0, 1, 2…) ternary alloys, and others is estimated. Estimations are performed using Goldsmid-Sharp’s formula E g = 2e|αmax|T max, Vegard’s rule E g = (m E Ag + n E Bg )/(m + n), and the empirical dependence T max = f(E g) (A and B denote the corresponding binary alloys, T max is the temperature corresponding to the thermoelectric-power maximum |αmax| or the thermoelectric figure of merit (ZT)max, and e is the elementary charge). It is shown that the empirical dependence E g = f(T max) gives the most accurate estimates of E g for difference classes of thermoelectric materials.
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Original Russian Text © M.A. Kretova, M.A. Korzhuev, 2017, published in Fizika i Tekhnika Poluprovodnikov, 2017, Vol. 51, No. 7, pp. 940–943.
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Kretova, M.A., Korzhuev, M.A. Estimation of the band gap of a series of new thermoelectric materials. Semiconductors 51, 902–905 (2017). https://doi.org/10.1134/S106378261707020X
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DOI: https://doi.org/10.1134/S106378261707020X