Estimation of the band gap of a series of new thermoelectric materials
| Autor: | M. A. Kretova, M. A. Korzhuev |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Physics Condensed matter physics Series (mathematics) Band gap Binary number 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics Thermoelectric materials Elementary charge 01 natural sciences Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Thermoelectric figure of merit 0103 physical sciences 0210 nano-technology Ternary operation |
| Zdroj: | Semiconductors. 51:902-905 |
| ISSN: | 1090-6479 1063-7826 |
| Popis: | 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 g A + n E g B )/(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. |
| Databáze: | OpenAIRE |
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