Effect of (Sm, In) Doping on the Electrical and Thermal Properties of Sb₂Te₃ Microstructures

Abstract

Doped Sb2Te3 narrow-band-gap semiconductors have been attracting considerable attention for different electronic and thermoelectric applications. Trivalent samarium (Sm)- and indium (In)-doped Sb2Te3 microstructures have been synthesized by the economical solvothermal method. Powder X-ray diffraction (PXRD) was used to verify the synthesis of single-phase doped and undoped Sb2Te3 and doping of Sm and In within the crystal lattice of Sb2Te3. Further, the morphology, structure elucidation, and stability have been investigated systematically by scanning electron microscopy (SEM), Raman analysis, and thermogravimetric analysis (TGA). These analyses verified the successful synthesis of hexagonal undoped Sb2Te3 (AT) and (Sm, In)-doped Sb2Te3 (SAT, IAT) microstructures. Moreover, the comparison of dielectric parameters, including dielectric constant, dielectric loss, and tan loss of AT, SAT, and IAT, was done in detail. An increment in the electrical conductivities, both AC and DC, from 1.92 × 10–4 to 4.9 × 10–3 Ω–1 m–1 and a decrease in thermal conductivity (0.68–0.60 W m–1 K–1) were observed due to the doping by trivalent (Sm, In) dopants. According to our best knowledge, the synthesis and dielectric properties of (Sm, In)-doped and undoped Sb2Te3 in comparison with their electrical properties and thermal conductivity have not been reported earlier. This implies that appropriate doping with (Sm, In) in Sb2Te3 is promising to enhance the electronic and thermoelectric behavior.

Tuning the lattice thermal conductivity of Sb2Te3 by Cr doping: a deep potential molecular dynamics study

“…[13][14][15][16] For instance, substituting a Sb element in Bi 0.5 Sb 1.5 Te 3 with a Mn element allows improvement of electric conductivity and reduction of lattice thermal conductivity, resulting in a maximum ZT of B 1.3 at 430 K. 14 Similarly, due to doping with trivalent dopants (Sm and In), an increase in electrical conductivity and a decrease in thermal conductivity were also both observed for Sb 2 Te 3 . 17 At the same time, some theoretical calculations have also been carried out to investigate the electron transport properties of element-doped Sb 2 Te 3 . Using the first-principles calculations and the semi-classical Boltzmann theory, Xu et al discovered that Se-doping allows enhancement of the thermoelectric properties of monolayer Sb 2 Te 3 .…”

Impact of Transformational Leadership and Transactional Leadership on Commitment to Change: Moderating role of Organizational Culture

“…Training is not enough for staff, experience selection, knowledge and skills to be compared. Explains the discussion and exchange of knowledge by using different channels that provide the opportunity to inform the knowledge of the environment and encourage the environment and motivate the efficient leaders (Komal et al, 2023).…”

Oil Price Shocks Drive Corruption; A Bibliometric Analysis

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