Thermoelectric Transport Properties of Ternaries Mixed Chalcogenide Bi2Te2 X (X= S And Se): A First Principle Study
Keywords:
Ternary mixed chalcogenides , Density functional theory , Electronic and thermo-electric transport propertiesAbstract
Thermoelectric transport properties of materials that possess a unique nature are of interest for many technological applications such as thermoelectric refrigerators and thermocouple. In this study, we have reported a theoretical investigation within the density functional theory (DFT) based on first principle calculation of the electronic and thermoelectric transport properties of ternary mixed chalcogenides Bi2Te2X (X=S and Se). The spin-orbit coupling (SOC) within the linear density approximation (LDA) is included during the electronic properties investigation. A semi-classical Boltzmann theory within a linear response method has been applied in investigating the transport properties of these compounds. The two compounds are found to have differences, both in electronic and transport properties despite their structural similarities. Results obtained from this study have been discussed and compared with a number of theoretical and experimental results of compounds with similar nature.