Article
Energy & Fuels
Dan A. Lamb, Stuart J. C. Irvine, Mark A. Baker, Craig Underwood, Simran Mardhani
Summary: This paper details the performance of CdTe photovoltaics onboard the AlSat-1N CubeSat in space, highlighting the potential and future development direction of the technology. The study shows that the cells are functioning normally, but there is room for improvement in areas such as stability and back contact processing.
PROGRESS IN PHOTOVOLTAICS
(2021)
Article
Materials Science, Multidisciplinary
Adam Danielson, Carey Reich, Jennifer Drayton, Alexandra Bothwell, Tushar Shimpi, James Sites, Walajabad Sampath
Summary: The addition of selenium has greatly improved CdTe-based photovoltaics by creating the ternary alloy CdSeTe, which increases the short-circuit current without compromising the voltage. The properties of CdSeTe films deposited under different conditions were studied, revealing the importance of source material selection and process optimization. Evidence suggests that the source material and deposited films change over time.
Article
Materials Science, Coatings & Films
Xuebing Bai, Qun Cai, Wenhao Xie, Yuqiao Zeng, Chenglin Chu, Xuhai Zhang
Summary: Magnetron sputtered TiNi thin films often require high substrate temperature or post-annealing treatment to achieve crystallization. This study demonstrates the deposition of dense crystalline TiNi thin films at a low substrate temperature (230 degrees C) using HiPIMS. The structure and phase transformation mechanism of TiNi films were investigated using SEM, XRD, TEM, DSC, and electrical resistivity analysis.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Physics, Multidisciplinary
Maryam Gholizadeh Arashti, Ebrahim Hasani, Monir Kamalian, Lida Babazadeh Habashi
Summary: Cadmium Sulfide (CdS) thin films were grown on different substrates to study their crystal structures, optical properties, and electrical parameters. The films grown on transparent conducting oxide (TCO) substrates showed better single-crystal characteristics and improved optical and electrical performance. CdS/ITO and CdS/FTO structures achieved higher efficiency in simulated solar cells, with values of 21.23% and 21.16% respectively. An optimized structure of Au/CdTe/CdS/ITO resulted in an efficiency of 22.80%.
Article
Materials Science, Multidisciplinary
Pradhyut Rajkumar, Bimal K. Sarma
Summary: The crystal growth and manipulation of hydroxyapatite films on different substrates were studied. It was found that the structure and morphology of the hydroxyapatite films depended on the growth duration, substrate type, and post-deposition annealing of the substrates. Titanium induced greater crystallinity in hydroxyapatite, while sputtered ZnO thin films caused reduced crystallinity. The thickness of hydroxyapatite increased with deposition time regardless of the substrate.
MATERIALS CHARACTERIZATION
(2022)
Article
Nanoscience & Nanotechnology
S. Levcenko, B. Teymur, D. B. Mitzi, T. Unold
Summary: Characterization of radiative transitions in trigonal Cu2BaSnS4 was experimentally studied via temperature and excitation intensity dependent photoluminescence measurements, revealing the contributions of free exciton, bound exciton, donor-acceptor-pair recombination, and free-to-bound transition. The activation energies and temperature shift for the radiative transitions were determined, with optical phonons playing a significant role in the energy shift of free exciton recombination above 90 K.
Article
Materials Science, Ceramics
Jahanbakhsh Mashaiekhy Asl, Ali Nemati, Iraj Hadi, Shamsedin Mirdamadi
Summary: This study investigates the influence of substrate materials on the growth mechanism and microstructure of Ta2O5 thin films. The results show that films grown on silicon wafers have finer crystals and better optical and morphological properties compared to films grown on BK7 glass substrates.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Huiyan Kong, Luyi Huang, Min Li, Ling Zhang, Heping Zeng
Summary: In this study, we assembled cadmium telluride on an AuAg alloy substrate and achieved five times stronger THz emission than silicon substrate. We also found that the enhancement can be controlled by adjusting the thickness of the semiconductor materials and plasmonic metal substrates. These findings are important for the development of terahertz photonic devices.
Article
Nanoscience & Nanotechnology
Chuanbin Wang, Shihang Liu, Junwei Shi, Qiang Shen
Summary: In this study, NiFe2O4 films were successfully deposited on BCZT-buffered SrTiO3 substrate by pulsed laser deposition, and it was found that the thickness of the buffer layer significantly influenced the rearrangement of cations and magnetic properties of NiFe2O4 films.
Article
Materials Science, Coatings & Films
Tamer Akan, Duygu Kisla, Gokhan Gurur Gokmen, Cagri Durmus
Summary: Thin films of pure Cadmium (Cd) were deposited on glass and HDPE samples using the Thermionic Vacuum Arc (TVA) method. The Cd films exhibited crystalline structure and uniform grain distribution. The Cd coatings increased the hydrophobicity of both glass and HDPE samples. The Cd-coated samples showed antibacterial activity against E. coli and L. innocua, but not against S. aureus.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
T. M. Mazur, M. P. Mazur
Summary: The temperature dependence of kinetic parameters in p-PbTe and p-CdTe thin films on glass substrates was examined. The surface mobility of current carriers in PbTe films was calculated as a function of temperature, assuming diffuse scattering of charge carriers. The mechanisms of intergranular current carrier transfer associated with thermoelectronic emission were established. The role of surface scattering and intergranular boundaries in thin films of lead and cadmium tellurides was addressed.
MOLECULAR CRYSTALS AND LIQUID CRYSTALS
(2023)
Article
Materials Science, Multidisciplinary
Nowshad Amin, Mohammad Rezaul Karim, Zeid Abdullah ALOthman
Summary: This study evaluated the impact of deposition pressure on the formation of CdTe thin films grown on ultra-thin glass substrates at high temperature using the CSS technique. The results showed that low pressure (1-5 Torr) led to maximum grain growth in CdTe films, while the film thickness and optical properties varied with different deposition pressures.
Article
Polymer Science
Sherif Madkour, Marcel Gawek, Andreas Hertwig, Andreas Schoenhals
Summary: The thermodynamic behavior of thin PVME films with an irreversible adsorbed layer on the substrate was studied. Various techniques, including leaching, AFM, ellipsometry, and dielectric spectroscopy, were used to investigate growth kinetics, critical film thickness, influence on glass transition temperature, and molecular dynamics of the adsorbed layer. The study revealed strong percolation effects of the adsorbed layer on thin films.
Article
Engineering, Electrical & Electronic
Vijay Singh Meena, Ajay Kumar Saini, Anand Singh, Sumit Jain, Devendra Kumar Rana, Mohan Singh Mehata
Summary: Four-layer anti-reflection coating film stacks were grown on the backside of the HgCdTe-CdZnTe assembly using the thermal-evaporation deposition technique. The ARC film stacks exhibited desired surface morphology, elemental composition, and micro-structural features. The reflectance of HgCdTe-CdZnTe assembly was reduced to less than 1.0% within the mid-wave infrared spectral region, proving the effectiveness of the four-layer ARC film stacks.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
A. U. Yimamu, M. A. Afrassa, B. F. Dejene, O. K. Echendu, J. J. Terblans, H. C. Swart, S. J. Motloung
Summary: Cadmium Telluride (CdTe) thin films were synthesized using a less commonly used salt, cadmium acetate, as a cadmium precursor. The film's structure, optical properties, conductivity, surface morphology, elemental composition, and surface roughness were investigated using XRD, UV-VIS, PEC, SEM, EDS, and SPM. The results showed that the film prepared at a deposition voltage of 1250 mV had better potential application.
MATERIALS TODAY COMMUNICATIONS
(2023)
