Journal of Siberian Federal University. Mathematics & Physics / The Research of Temperature Dependences of Electrical Conductivity and Thermopower of WS2 and WSe2 with Partial Replacement of W on Nb

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Issue
Journal of Siberian Federal University. Mathematics & Physics. 2018 11 (4)
Authors
Yakovleva, Galina E.; Romanenko, Anatoly I.; Berdinsky, Alexander S.; Kuznetsov, Vitalii A.; Ledneva, Alexandra Yu.; Fedorov, Vladimir E.
Contact information
Yakovleva, Galina E.: Nikolaev Institute of Inorganic Chemistry Lavrentiev, 3, Novosibirsk 630090, Russia; ; Romanenko, Anatoly I.: Nikolaev Institute of Inorganic Chemistry Lavrentiev, 3, Novosibirsk 630090 National Research Tomsk State University Lenina, 36, Tomsk, 634050 Russia; ; Berdinsky, Alexander S.: Novosibirsk State Technical University Marksa, 20, Novosibirsk, 630073 Russia; ; Kuznetsov, Vitalii A.: Nikolaev Institute of Inorganic Chemistry Lavrentiev, 3, Novosibirsk, 630090 Novosibirsk State Technical University Marksa, 20, Novosibirsk, 630073, Russia; ; Ledneva, Alexandra Yu.: Nikolaev Institute of Inorganic Chemistry Lavrentiev, 3, Novosibirsk, 630090, Russia; ; Fedorov, Vladimir E.: Nikolaev Institute of Inorganic Chemistry Lavrentiev, 3, Novosibirsk, 630090, Russia;
Keywords
thermopower; tungsten disulfide; tungsten diselenide; power factor
Abstract

The temperature dependences of electrical conductivity and thermopower of tungsten disulfide and tung- sten diselenide have been investigated in this paper. These materials have the low value of electrical conductivity. The main idea of this paper is the increase of electrical conductivity for obtaining high thermoelectric efficiency. Niobium have served as an acceptor impurity. It has been revealed that the replacements of metal atoms have increased of electrical conductivity of W0:85Nb0:15Se2 by 4 order of magnitude. While the thermopower has decreased with increasing of impurity concentration. The ther- moelectric power factor has been calculated for materials. The figure of merit ZT of the best composition W0:95Nb0:05Se2 has been estimated and has had a value of 0.02 at room temperature.

Pages
459–464
Paper at repository of SibFU
https://elib.sfu-kras.ru/handle/2311/71758