Synthesis and Thermoelectric Properties of TuSnSe₂ Compound
Abstract
In this research work, the interaction of the SnSe-TuSe system was studied, and as a result of complex physicochemical analyses, the solubility region of TuSe in SnSe (75-100%) was determined. It was also determined that the TuSnSe2 compound was obtained in a 1:1 ratio of its components, and a phase diagram of the system was constructed. X-ray structure and differential thermal analysis of the sample showed that this compound crystallizes in a hexagonal syngony. Some kinetic parameters of the triple compound TuSnSe2 were determined at room temperature. Electrical conductivity (σ), thermo electromotive force (e.m.f.) (α) and thermal conductivity (χ) were studied in the temperature range T=300÷800K. In order to determine the variation in the charge carrier scattering mechanism the temperature dependences of the Hall mobility and electrical conductivity of this compound were also investigated. Based on the sign of the thermo-electromotive force and the Hall coefficient, it was determined that the conductivity in this compound is n- type. Based on the obtained results, it was determined how the concentration of charge carriers and the Hall mobility changed. Anomaly changes are observed in the temperature dependence of the electrical conductivity, thermoelectric potential and total thermal conductivity in the temperature interval T=460÷500K.
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References
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