The underpotential deposition of Bi2Te3−ySey thin films by an electrochemical co-deposition method

Comprehensive Review on Thermoelectric Electrodeposits: Enhancing Thermoelectric Performance Through Nanoengineering

Thermoelectric devices based power generation and cooling systemsystem have lot of advantages over conventional refrigerator and power generators, becausebecause of solid-state devicesdevices, compact size, good scalability, nono-emissions and low maintenance requirement with long operating lifetime. However, the applications of thermoelectric devices have been limited owingowing to their low energy conversion efficiency. It has drawn tremendous attention in the field of thermoelectric materials and devices in the 21st century because of the need of sustainable energy harvesting technology and the ability to develop higher performance thermoelectric materials through nanoscale science and defect engineering. Among various fabrication methods, electrodeposition is one of the most promising synthesis methods to fabricate devices because of its ability to control morphology, composition, crystallinity, and crystal structure of materials through controlling electrodeposition parameters. Additionally, it is an additive manufacturing technique with minimum waste materials that operates at near room temperature. Furthermore, its growth rate is significantly higher (i.e., a few hundred microns per hour) than the vacuum processes, which allows device fabrication in cost effective matter. In this paper, the latest development of various electrodeposited thermoelectric materials (i.e., Te, PbTe, Bi₂Te₃ and their derivatives, BiSe, BiS, Sb₂Te₃) in different forms including thin films, nanowires, and nanocomposites were comprehensively reviewed. Additionally, their thermoelectric properties are correlated to the composition, morphology, and crystal structure.

Multi-elemental chalcogeniden-BiCdSe films grown under controlled depth voltammetry: improved photo-electrochemical behaviour toward energy conversion

In this study, a combinatorial approach was developed for fabricating nanostructured composite semiconductor matrices, which exhibited promising photo-response, appreciable photo-current potential and enhanced energy conversion efficiency.

Voltammetric deposition of BiCdTe composite films with improved functional properties for photo-electrochemical cells

n-Type BiCdTe nanostructured films produced by periodic voltammetry exhibit high photo-conversion efficiency and significantly promote charge transport across the electrode/electrolyte interface.

Evolution of Pb(1-x)Sn(x)Te thin films from dendrites to nanoparticles on gold substrates by electrodeposition

Dendritic and nanostructured Pb(1-x)Sn(x)Te thin films were synthesized on gold substrates from acidic solutions through a simple electrodeposition route. The deposition potential of thin films was determined using cyclic voltammetry. All of the thin films were deposited in both the absence and presence of cetyltrimethylammonium bromide (CTAB) as a cationic surfactant. X-ray diffraction (XRD), scanning electron microscopy (SEM), atomic force microscopy (AFM), and Fourier transform infrared (FT-IR) spectroscopy were employed to characterize the deposits. XRD results showed that the diffraction peaks shift to larger angles as mole fraction x increases, indicating the formation of Pb(1-x)Sn(x)Te alloy. Morphological analysis revealed that the obtained thin films in the absence of CTAB were composed of dendrites, while the obtained thin films in the presence of CTAB were made of nanoparticles. Growth mechanisms for the dendritic and nanostructured thin films were discussed. The optical absorption studies show that the band gap of Pb(1-x)Sn(x)Te thin films grown with short deposition times could be tuned from 0.21 to 0.35 eV by adding only the surfactant to the deposition solution.