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Thermoelectric properties of W1-xNbxSe2-ySy polycrystalline compounds
- Title
- Thermoelectric properties of W1-xNbxSe2-ySy polycrystalline compounds
- Authors
- Yakovleva, Galina E.; Romanenko, Anatoly I.; Ledneva, Alexandra Yu.; Belyavin, Viktor A.; Kuznetsov, Vitalii A.; Berdinsky, Alexandr S.; Burkov, Alexandr T.; Konstantinov, Petr P.; Novikov, Sergey V.; Han, Mi-Kyung; Kim, Sung-Jin; Fedorov, Vladimir E.
- Ewha Authors
- 김성진; 한미경
- SCOPUS Author ID
- 김성진; 한미경
- Issue Date
- 2019
- Journal Title
- JOURNAL OF THE AMERICAN CERAMIC SOCIETY
- ISSN
- 0002-7820
1551-2916
- Citation
- JOURNAL OF THE AMERICAN CERAMIC SOCIETY vol. 102, no. 10, pp. 6060 - 6067
- Keywords
- conductivity; layered crystal structures; polycrystalline materials; thermal conductivity; thermoelectric properties
- Publisher
- WILEY
- Indexed
- SCIE; SCOPUS
- Document Type
- Article
- Abstract
- We investigate the thermoelectric properties of bulk polycrystalline samples of WSe2-based compounds with partial substitutions in the cationic (W) and the anionic (Se) sublattices in the temperature range from 4.2 to 650 K. The substitution of W for Nb leads to a significant increase in the charge carrier concentration, however, deteriorates the charge carrier mobility. In contrast, the substitution of selenium for sulfur increases the charge carrier mobility, the thermal conductivity, and the Seebeck coefficient but conductivity changes non-monotonical. We show that the addition of sulfur in anionic sublattice affects the grain sizes in the polycrystalline material. Using substitutions in the anionic and cationic sublattices, we find the optimal ratio of the elements for better thermoelectric efficiency. The W0.98Nb0.02Se1.7S0.3 sample showed the best value of the figure of merit ZT = 0.26 (T = 650 K).
- DOI
- 10.1111/jace.16455
- Appears in Collections:
- 자연과학대학 > 화학·나노과학전공 > Journal papers
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