Enhanced thermoelectricity by controlled local structure in bismuth-chalcogenides
| Autor: | Terashima, K., Yano, Y., Paris, E., Goto, Y., Mizuguchi, Y., Kamihara, Y., Wakita, T., Muraoka, Y., Saini, N. L., Yokoya, T. |
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| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | J. Appl. Phys. 125, 145105 (2019) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1063/1.5087096 |
| Popis: | Spectroscopic techniques, including photoelectron spectroscopy, diffuse reflectance, and x-ray absorption, are used to investigate the electronic structure and the local structure of LaOBiS$_{2-x}$Se$_x$ thermoelectric material. It is found that Se substitution effectively suppresses local distortion, that can be responsible for the increased carrier mobility together with a change in the electronic structure. The results suggest a possible way to control thermoelectric properties by tuning of the local crystal structure of these materials. Comment: 6 pages, 4 figures, 1 table, J. Appl. Phys. (in press) |
| Databáze: | arXiv |
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