Journal• ISSN: 2714-500X
Physics Access
Department of Physics, Kaduna State University
About: Physics Access is an academic journal published by Department of Physics, Kaduna State University. The journal publishes majorly in the area(s): Environmental science & Chemistry. It has an ISSN identifier of 2714-500X..
Topics: Environmental science, Chemistry, Geology, Medicine, Computer science
Papers
TL;DR: The optimization of absorber and ETM layer thickness for enhanced tin-based perovskite solar cell performance using SCAPS-1D software results in improved solar cell performance with optimized parameters and superior values compared to the initial simulation.
Abstract: The methyl ammonium tin iodide (〖CH〗_3 〖NH〗_3 〖SnI〗_3) perovskite nanocrystals have attracted research interest and have become a rising star in the horizon of photovoltaics due to its narrow band gap, wide visible absorption coefficient and environmental friendliness than its lead-based counterpart (〖CH〗_3 〖NH〗_3 〖PbI〗_3). In this article, a tin based perovskite solar cell with Zinc oxide (ZnO) and Copper Oxide (CuO) as electron transport medium (ETM) and hole transport medium (HTM) was proposed and investigated numerically using a Solar Cell Capacitance Simulator (SCAPS) tool. With appropriate parameters, a short-circuit current density (Jsc) of 27.56 mA/cm^2, open-circuit voltage (Voc) of 0.82 V, fill factor (FF) of 59.32 %, and power conversion efficiency (PCE) of 13.41 % are obtained for the initial simulation. By varying the thicknesses of the absorber and electron transport layer, the optimum thicknesses were observed at 0.6 μm and 0.3 μm for 〖CH〗_3 〖NH〗_3 〖SnI〗_3 and ZnO with corresponding PCEs of 14.36 % and 13.42 %. Upon simulation with optimized parameters, a Jsc of 29.71 mA/cm^2, Voc of 0.83 V, FF of 61.23 % and PCE of 15.10 % were recorded. These values are superior to those obtained without optimization which means that solar cell performance can be improved to some extent by adjusting the perovskite and electron transport layer and also, 〖CH〗_3 〖NH〗_3 〖SnI〗_3 Perovskite solar cell (PSC) is a potential environmentally friendly solar cell with considerable efficiency.
16 citations
TL;DR: First-principles calculations on MoS2 structural, electronic, and elastic properties reveal good agreement with available data and suggest potential optoelectronic applications.
Abstract: In this paper, the structural, electronic, and elastic properties of molybdenum disulfide (MoS2) in hexagonal and trigonal phases were investigated using first-principles calculations based on density functional theory (DFT) as implemented in the Quantum ESPRESSO package. Our findings from the structural and electronic properties of MoS2 show that bulk hexagonal and trigonal MoS2 phases have a calculated bandgap of 1.37 and 1.56 eV respectively, which is in good agreement with available theoretical and experimental results. The elastic properties show that both space groups of MoS2 are brittle at zero pressure and they also agree with Born's mechanical stability condition. The overall results place our new optimized MoS2 as a potential candidate for optoelectronic application.
6 citations
TL;DR: Synthesis and characterization of semiconducting iron copper sulphide thin films review the latest progress in the field, focusing on chemical deposition techniques, morphology, and opto-electrical properties.
Abstract: Iron copper sulphide (FeCuS) thin films have attracted much importance due to their
exceptional properties for device applications. The chemical deposition techniques of
chemical bath deposition (CBD) and Successive ionic layer absorption and reaction (SILAR)
have been employed to synthesize FeCuS thin films with good substrates adhesion. The
various advantages and shortcomings of these methods were discussed with their capability to control the morphology and opto-electrical properties of the films. The experimental measurements indicated that the films exhibit great potential for optoelectronic applications such as window materials in solar cell fabrications and coatings of different types. Due to the current interest in FeCuS thin films, this review is intended to provide current information on the synthesis, characterization, and applications of iron copper sulphide thin films.
2 citations
TL;DR: The study investigates the effect of imbalance and non-linear load on 11kV Pama feeder, revealing high levels of voltage dips, swells, harmonics, and imbalance. These results imply the presence of harmonics within the system, triggering operating complications and premature failure of transformer.
Abstract: In this research, the effect of imbalance and nonlinear load on power quality was investigated via the electronic method with the aid of a Fluke 435 power quality analyser and the results obtained compared with IEEE standards. The study was carried out on 11 kV Pama feeder Kaduna state, Nigeria, which is comprised of Nassarawa, Boro1, Pama 1, Pama 2, and Pama 4 substations. The analyzed result shows an average value of 230 and 1327 times voltage dips and swells, 11.74 % harmonics current, 2.33 % harmonic voltage, 5.96% imbalance voltage and 25% imbalance current respectively. When compared with the IEEE standard limits of 5 % and 2 % harmonic current and voltage, 10 % and 5 % imbalance current and voltage, it could be seen that these results imply the presence of harmonics within the system which are fundamentally due to imbalance and non-linear load, triggering operating complications on the distribution system. These complications include load disruptions, over current, over voltage,
heating, leading to forceful outages, increased power losses, faster ageing of insulations, unstable power supply, burnt cables, sockets and connectors, thus reducing capacity and ultimately resulting in premature failure of transformer.
1 citations
TL;DR: Eu3+ dopant significantly enhances the red emission performance of zinc phosphor-sulfo-tellurite glasses. The optimized concentration of Eu3+ ions is 2 mol% for achieving the best red emission properties.
Abstract: In this paper, the effect of substituting europium (Eu3+) ion on physical and photoluminescence properties of zinc phosphor-sulfo-tellurite glasses is reported for the first time. The glass matrices with novel compositional range of 10ZnO–40TeO2–10SO3–(40-x)P2O5– xEu2O3 were synthesized by convectional melt-quenching route and characterized via density and photoluminescence (PL) measurements. The non-linearity properties of these glasses was ascertained and dependence of red emission performance under λex= 394 nm excitation wavelengths disclosed bright red emission at λem. = 612nm. The concentration quenching phenomenon was observed after a particular value of europium ions (beyond 2 mol %). Thus, 2 mol% of Eu3+ in the glass composition was identified as the optimized concentration for the design and development of solid state red laser and color display devices.
1 citations
Performance Metrics
| Year | Papers |
|---|---|
| 2025 | 10 |
| 2024 | 26 |
| 2023 | 23 |
| 2022 | 17 |