Estimation of the band gap of a series of new thermoelectric materials
- Authors: Kretova M.A.1, Korzhuev M.A.1
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Affiliations:
- Baikov Institute of Metallurgy and Material Science
- Issue: Vol 51, No 7 (2017)
- Pages: 902-905
- Section: XV International Conference “Thermoelectrics and Their Applications—2016”, St. Petersburg, November 15–16, 2016
- URL: https://journals.rcsi.science/1063-7826/article/view/200360
- DOI: https://doi.org/10.1134/S106378261707020X
- ID: 200360
Cite item
Abstract
The band gap Eg 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 Eg = 2e|αmax|Tmax, Vegard’s rule Eg = (mEgA + nEgB)/(m + n), and the empirical dependence Tmax = f(Eg) (A and B denote the corresponding binary alloys, Tmax 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 Eg = f(Tmax) gives the most accurate estimates of Eg for difference classes of thermoelectric materials.
About the authors
M. A. Kretova
Baikov Institute of Metallurgy and Material Science
Author for correspondence.
Email: kretova@imet.ac.ru
Russian Federation, Moscow, 119334
M. A. Korzhuev
Baikov Institute of Metallurgy and Material Science
Email: kretova@imet.ac.ru
Russian Federation, Moscow, 119334