Geodesic
The research of temperature dependences of electrical conductivity and thermopower of WS$_2$ and WSe$_2$ with partial replacement of W on Nb
Žurnal Sibirskogo federalʹnogo universiteta. Matematika i fizika, Tome 11 (2018) no. 4, pp. 459-464

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The temperature dependences of electrical conductivity and thermopower of tungsten disulfide and tungsten 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 W$_{0.85}$Nb$_{0.15}$Se$_2$ by $4$ order of magnitude. While the thermopower has decreased with increasing of impurity concentration. The thermoelectric power factor has been calculated for materials. The figure of merit $ZT$ of the best composition W$_{0.95}$Nb$_{0.05}$Se$_2$ has been estimated and has had a value of 0.02 at room temperature.
Keywords: thermopower, tungsten disulfide, tungsten diselenide, power factor. 
@article{JSFU_2018_11_4_a6,
     author = {Galina E. Yakovleva and Anatoly I. Romanenko and Alexander S. Berdinsky and Vitalii A. Kuznetsov and Alexandra Yu. Ledneva and Vladimir E. Fedorov},
     title = {The research of temperature dependences of electrical conductivity and thermopower of {WS}$_2$ and {WSe}$_2$ with partial replacement of {W} on {Nb}},
     journal = {\v{Z}urnal Sibirskogo federalʹnogo universiteta. Matematika i fizika},
     pages = {459--464},
     publisher = {mathdoc},
     volume = {11},
     number = {4},
     year = {2018},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JSFU_2018_11_4_a6/}
}
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%A Anatoly I. Romanenko
%A Alexander S. Berdinsky
%A Vitalii A. Kuznetsov
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%A Vladimir E. Fedorov
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Galina E. Yakovleva; Anatoly I. Romanenko; Alexander S. Berdinsky; Vitalii A. Kuznetsov; Alexandra Yu. Ledneva; Vladimir E. Fedorov. The research of temperature dependences of electrical conductivity and thermopower of WS$_2$ and WSe$_2$ with partial replacement of W on Nb. Žurnal Sibirskogo federalʹnogo universiteta. Matematika i fizika, Tome 11 (2018) no. 4, pp. 459-464. http://geodesic.mathdoc.fr/item/JSFU_2018_11_4_a6/