Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Thermoelectric properties of W 1−x Nb x Se 2−y S y polycrystalline compounds. / Yakovleva, Galina E.; Romanenko, Anatoly I.; Ledneva, Alexandra Yu и др.
в: Journal of the American Ceramic Society, Том 102, № 10, 10.2019, стр. 6060-6067.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Thermoelectric properties of W 1−x Nb x Se 2−y S y polycrystalline compounds
AU - Yakovleva, Galina E.
AU - Romanenko, Anatoly I.
AU - Ledneva, Alexandra Yu
AU - Belyavin, Viktor A.
AU - Kuznetsov, Vitalii A.
AU - Berdinsky, Alexandr S.
AU - Burkov, Alexandr T.
AU - Konstantinov, Petr P.
AU - Novikov, Sergey V.
AU - Han, Mi Kyung
AU - Kim, Sung Jin
AU - Fedorov, Vladimir E.
PY - 2019/10
Y1 - 2019/10
N2 - We investigate the thermoelectric properties of bulk polycrystalline samples of WSe 2 -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 W 0.98 Nb 0.02 Se 1.7 S 0.3 sample showed the best value of the figure of merit ZT = 0.26 (T = 650 K).
AB - We investigate the thermoelectric properties of bulk polycrystalline samples of WSe 2 -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 W 0.98 Nb 0.02 Se 1.7 S 0.3 sample showed the best value of the figure of merit ZT = 0.26 (T = 650 K).
KW - conductivity
KW - layered crystal structures
KW - polycrystalline materials
KW - thermal conductivity
KW - thermoelectric properties
KW - LAYERED STRUCTURE
KW - WSE2
KW - BEHAVIOR
KW - ELECTRICAL-CONDUCTIVITY
KW - ELECTRONIC TRANSPORT
KW - TRANSITION
KW - WS2
KW - TUNGSTEN DISELENIDE
KW - THERMOPOWER
UR - http://www.scopus.com/inward/record.url?scp=85065019825&partnerID=8YFLogxK
U2 - 10.1111/jace.16455
DO - 10.1111/jace.16455
M3 - Article
AN - SCOPUS:85065019825
VL - 102
SP - 6060
EP - 6067
JO - Journal of the American Ceramic Society
JF - Journal of the American Ceramic Society
SN - 0002-7820
IS - 10
ER -
ID: 20040762