Article
Engineering, Electrical & Electronic
Ritwik Nag, Sandeep K. Chaudhuri, Joshua W. Kleppinger, OmerFaruk Karadavut, Krishna C. Mandal
Summary: A modified vertical Bridgman method was used to grow CZTS single crystals for room-temperature radiation detection, achieving high resistivity, crystallinity, and desired elemental composition. The growth technique reduced duration and production costs of CZTS-based detectors.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
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
Chemistry, Multidisciplinary
Matjaz Kristl, Saso Gyergyek, Sreco D. Skapin, Janja Kristl
Summary: Binary nickel tellurides NiTe, NiTe2, and Ni2Te3 were successfully synthesized via a mechanochemical method, with the products characterized using various techniques. The materials exhibited nanostructured aggregates with ferromagnetic behavior and band gap energies calculated from Tauc plots.
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
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
Chemistry, Physical
C. H. Swartz, E. G. LeBlanc, C. Perkins, D. L. McGott, M. O. Reese, A. Nichols, T. H. Myers
Summary: For solar cells based on CdTe, we investigated p-type PbTe and SnTe as ohmic contacts. The results showed that the highest doped PbTe resulted in desirable band alignment with CdTe, leading to improved performance of the CdTe solar cells, primarily from increased fill factor.
APPLIED SURFACE SCIENCE
(2022)
Article
Engineering, Electrical & Electronic
Ebrahim Hasani, Davood Raoufi
Summary: The research showed that the crystallite size of CdTe films increases with annealing temperature, and Te precipitates form in the films during annealing. Additionally, the optical energy band gap decreases with higher annealing temperatures.
SEMICONDUCTOR SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Oleg Chugai, Oleksii Poluboiarov, Sergey Oleynick, Sergei Sulima, Oleksii Voloshin, Roman Zaitsev, Mykhailo Kirichenko
Summary: In this study, the SPDS method was utilized to investigate the energy spectrum of charge carriers' localized states in Cd1-xZnxTe crystals grown from the melt. By introducing additional photoexcitation, the energy spectrum of localized states broadens, and a new parameter related to the occupation of localized states was introduced to explain determinate variations.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Article
Engineering, Electrical & Electronic
Sandeep K. Chaudhuri, Joshua W. Kleppinger, OmerFaruk Karadavut, Ritwik Nag, Rojina Panta, Forest Agostinelli, Amit Sheth, Utpal N. Roy, Ralph B. James, Krishna C. Mandal
Summary: In this article, the growth of Cd0.9Zn0.1Te0.97Se0.03 (CZTS) wide bandgap semiconductor single crystals for room temperature gamma-ray detection is reported. The article also introduces a deep convolutional neural network (CNN) that efficiently identifies the energy of gamma photons detected by a CZTS detector. The CNN is trained using simulated data and shows low prediction error for different energy levels.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Electrochemistry
Ozlem Uguz Neli, Oezlem Budak, Atif Koca
Summary: Cadmium zinc sulfoselenide (CdZnSSe) and reduced graphene oxide-cadmium zinc sulfoselenide (RGO)-CdZnSSe composite-based photoelectrodes were fabricated using a facile, simultaneous co-electrodeposition method for the first time. The rCV technique allowed for homogeneous decoration of CdZnSSe particles among RGO sheets, resulting in improved photoelectrochemical performance in hydrogen evolution. The Cd0.8Zn0.2S0.2Se0.8 photodecoration demonstrated the highest photocurrent density (4.08 mA cm-2), which was further increased to 5.00 mA cm-2 by decorating with RGO. The proposed rCV technique showed superiority in fabricating well-controlled RGO-CdZnSSe composite photoelectrodes.
ELECTROCHIMICA ACTA
(2023)
Article
Materials Science, Multidisciplinary
Madeeha Riaz, Hina Imtiaz, Murid Hussain, Alliya Qamar, Farooq Bashir, Tousif Hussain
Summary: Hardystonite (Ca2ZnSi2O7) was prepared using a non-stoichiometric composition by the solid-state method at 1200 C. The results showed that it has a suitable optical band gap, dielectric constant, resistivity, and AC conductivity for sensor, bolometer, and optoelectronic applications.
Article
Environmental Sciences
Boubaker Youbi, Youssef Lghazi, Mohammed Ait Himi, Aziz Aynaou, Jihane Bahar, Chaimaa El Haimer, Abdessamad Ouedrhiri, Ahmed Sahlaoui, Itto Bimaghra
Summary: Zinc telluride (ZnTe) is a promising material for optoelectronic and photovoltaic device applications due to its optimal characteristics in terms of environmental compatibility, abundance, and photoactivity. This study revealed that the electrodeposition of ZnTe on an indium tin oxide substrate is a quasi-reversible reaction controlled by diffusion, following the nucleation and growth mechanism proposed by Scharifker and Hill. The crystallographic structure of the ZnTe films was found to be cubic, and the films exhibited good homogeneity. Optical measurements showed a direct energy gap of 2.39 eV for the deposited films.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Multidisciplinary Sciences
Srutarshi Banerjee, Miesher Rodrigues, Manuel Ballester, Alexander Hans Vija, Aggelos K. Katsaggelos
Summary: In this article, a new microscopic learning-based physical model of room-temperature semiconductor radiation detectors (RTSD) is proposed. The model utilizes physical charge transport considering trapping centers and learns material properties indirectly from measurable signals. Depending on the amount of data used during training, the algorithm can characterize the RTSD completely or in an equivalent manner.
SCIENTIFIC REPORTS
(2023)
Article
Engineering, Electrical & Electronic
Hussein H. Abed, M. Merdan, Mudar A. Abdulsattar, Hayder M. Abduljalil, Ahmed Hashim
Summary: Density functional theory (DFT) and time-dependent density functional theory (TDDFT) at the B3LYP level were used to study the structural and electronic properties, as well as UV-Vis spectra of Cd11-nZnnTe11 (n=0,2-5,11) nanostructures. Increasing the concentration of Zn atoms resulted in higher binding energy and energy gap. The LUMO level increased with decreasing Cd atoms and charge distribution at the center of the nanocrystals, while the HOMO level showed the opposite trend. Replacement of Cd atoms by Zn atoms caused a shift of the UV-Vis spectra towards the UV region. This research highlights the capability to control physical properties by varying the compositions of nanostructures, which has broad applications in photoelectronic devices, detectors, and sensors.
JOURNAL OF ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Lu Liang, Aoqiu Wang, Yingming Wang, Zhentao Qin, Chi Qin, Rongjin Shang, Kai Jiang, Yuwei Cao, Lingyan Xu, Wanqi Jie
Summary: The effects of heavy ion irradiation on the electric performance of CdZnTe crystals were investigated in this study. It was found that the irradiation introduces a damage layer dominated by donor defects, leading to the formation of an n(+)/n homojunction. The current-voltage curves follow the Schottky emission model at low irradiation fluences, but show increased leakage current due to the Poole-Frenkel effect at higher fluences. The study provides important reference data for the irradiation protection of CdZnTe devices in high-fluence applications.
Article
Materials Science, Ceramics
Tanvir Hussain, M. F. Al-Kuhaili, S. M. A. Durrani, H. A. Qayyum
CERAMICS INTERNATIONAL
(2018)
Article
Chemistry, Physical
H. A. Qayyum, M. F. Al-Kuhaili, S. M. A. Durrani, Tanvir Hussain, S. H. A. Ahmad, Mujtaba Ikram
JOURNAL OF ALLOYS AND COMPOUNDS
(2018)
Article
Biochemical Research Methods
Hakimu Nsubuga, Chanbasha Basheer, Muhammad Baseer Haider, Rasheed Bakdash
JOURNAL OF CHROMATOGRAPHY A
(2018)
Article
Chemistry, Physical
M. F. Al-Kuhaili, M. B. Mekki
JOURNAL OF ALLOYS AND COMPOUNDS
(2019)
Article
Environmental Sciences
Hakimu Nsubuga, Chanbasha Basheer, Almaz Jalilov, Muhammad Baseer Haider, Abdulaziz A. Al-Saadi
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2019)
Article
Energy & Fuels
M. F. Al-Kuhaili
Article
Materials Science, Multidisciplinary
M. F. Al-Kuhaili, M. B. Mekki, S. A. Abdalla
Article
Engineering, Chemical
Hakimu Nsubuga, Chanbasha Basheer, Muhammad Baseer Haider
SEPARATION AND PURIFICATION TECHNOLOGY
(2019)
Article
Engineering, Electrical & Electronic
M. F. Al-Kuhaili
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2020)
Article
Materials Science, Multidisciplinary
Muhammad Baseer Haider
Article
Materials Science, Multidisciplinary
M. F. Al-Kuhaili, M. E. Daoud, M. B. Mekki
OPTICAL MATERIALS EXPRESS
(2020)
Article
Chemistry, Multidisciplinary
M. F. Al-Kuhaili
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2020)
Article
Crystallography
Monzer Maarouf, Muhammad Baseer Haider, Qasem Ahmed Drmosh, Mogtaba B. Mekki
Summary: In this study, titanium nitride thin films were grown on Si(001) and fused silica substrates by radio frequency reactive magnetron sputtering, followed by post-growth annealing at different temperatures in nitrogen ambient. The films annealed at temperatures above 300 degrees C showed higher surface roughness, smaller grain size, better crystallinity, and decreased bandgap. Hall effect measurements indicated n-type conductivity in all films, with high carrier concentration that slightly increased with annealing temperature. X-ray photoelectron spectroscopy confirmed the formation of Ti-N bond and the presence of chemisorbed oxygen in the films, with annealing in nitrogen ambient resulting in increased nitrogen vacancies and non-stoichiometric TiN films.
Article
Materials Science, Multidisciplinary
Ebrahim Abualgassem, Monzer Maarouf, Abdulhakim Bake, David Cortie, Khan Alam, Muhammad Baseer Haider
Summary: Chromium-doped titanium nitride thin films were deposited using RF/DC reactive magnetron co-sputtering technique. The optical, chemical, surface morphology, and magnetic properties of the films were studied using various characterization techniques. The presence of chromium in different oxidation states was confirmed, and a redshift in the bandgap of the films was observed with increasing chromium concentration. The films with lower chromium concentration exhibited ferromagnetic behavior and higher saturation magnetization compared to the films with higher chromium concentration.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Monzer Maarouf, Muhammad Baseer Haider, Mohammed Fayyad Al-Kuhaili, Abdullah Aljaafari, Javed Yar Khan
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2020)