Synthesis of Bismuth Telluride Thin Film for Thermoelectric Application Via Electrodeposition Technique

Abstract

Summary Nanocrystalline Bismuth Telluride (Bi2Te3) thin film was electrodeposited potentiostatically at room temperature from acidic bath. In order to study their structural, morphological properties and compositional analysis of as synthesized thin film were systematically examined by X‐ray diffraction (XRD), scanning electron microscopy (SEM) and and energy dispersive spectroscopy (EDS). The crystallographic characterization of Bi2Te3 thin film was carried out using XRD and main diffraction peak at (015) plane of the Bi2Te3 confirmed that the formation of rhombohedral crystal structure. Rapid development in thermoelectric material due to directly converting thermal energy to electric energy. The thermoelectric performance of Bi2Te3 thin film was assessed with the result of electrical resistivity and Seebeck coefficient parameters. In addition, such well adherent Bi2Te3 thin film with improved Seebeck coefficient and electrical conductivity which is helpful for development of efficient materials for thermoelectric application. In order to study the thermoelectric performance of Bi2Te3 it is prepared by potentiostatic electrodeposition.

Comprehensive Review on Thermoelectric Electrodeposits: Enhancing Thermoelectric Performance Through Nanoengineering

“…The Seebeck coefficient of 32.89 μV/K was obtained (Yang et al, 2016). Patil et al (2016) electrodeposited thin Bi 2 Te 3 film in a solution with 10 mM Te(IV), 7 mM Bi(NO 3 ) 3 •5H 2 O and 1 M HNO 3 . The XRD pattern showed that the Bi 2 Te 3 film was nanocrystalline with grain size of 18.08 nm and had a preferred orientation of (015) with rhombohedral crystal structure (Patil et al, 2016).…”

“…Patil et al (2016) electrodeposited thin Bi 2 Te 3 film in a solution with 10 mM Te(IV), 7 mM Bi(NO 3 ) 3 •5H 2 O and 1 M HNO 3 . The XRD pattern showed that the Bi 2 Te 3 film was nanocrystalline with grain size of 18.08 nm and had a preferred orientation of (015) with rhombohedral crystal structure (Patil et al, 2016). Na et al (2016) electrodeposited n-type Bi 2 Te 3 films in the electrolyte with 10 mM HTeO 2 + , 8 mM Bi 3+ and 1 M HNO 3 on a flexible substrate.…”

Effect of electron beam irradiation on EIS and photoelectrochemical performance of electrodeposited nanocrystalline Bi2Te3 thin films

“…A few literatures are available on Bi 2 Te 3 as PEC and for STEG application. Patil et al [21] observed the fernshaped dendrites microstructure and rhombohedral crystal structure with crystallite size 18.08 nm of potentiostastically electrodeposited Bi 2 Te 3 thin films for thermoelectric application. Chaudhari et al [22] reported that, due to irradiation of proton beam with energy 7.5 MeV, single crystals of p-type Bi 2 Te 3 converted to n-type, and Hall coefficient increased while Hall mobility and magnetoresistance coefficient decreased with increasing radiation dose.…”