Electron transport properties of thermoelectrics based on layered substituted transition metal dichalcogenides

A. I. Romanenko, G. E. Yakovleva, V. E. Fedorov, A. Yu Ledneva, V. A. Kuznetsov, A. V. Sotnikov, A. R. Tsygankova, B. M. Kuchumov

Результат исследования: Научные публикации в периодических изданияхстатья

4 Цитирования (Scopus)

Аннотация

Temperature dependences of the electrical conductivity are studied in the range 4.2’300 K and Seebeck coefficient at room temperature of bulk samples of tungsten dichalcogenide polycrystals with niobium substitutions for tungsten and selenium substitutions for sulfur – W1–xNbx(S1–ySey)2. The two-dimensionalization of electron transport properties is detected at niobium concentrations x ≥ 0.1 in W1–xNbxS2 and x ≥ 0.05 in W1–xNbxSe2. In samples with additional partial selenium substitution for sulfur the electron transport remains three-dimensional. At room temperature the Seebeck coefficient (at equal electrical conductivities) is several times higher in the samples with quasi-two-dimensional transport than in the samples with three-dimensional transport. The calculation of the power factor at room temperature shows its nine times increase.

Язык оригиналаанглийский
Страницы (с-по)893-900
Число страниц8
ЖурналJournal of Structural Chemistry
Том58
Номер выпуска5
DOI
СостояниеОпубликовано - 1 сен 2017

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