Seyedeh Robabeh Miry; Fatemeh Ahmadi
Abstract
Quantum state teleportation plays a significant role in the field of quantum information transfer. In this article, we proposed the teleportation of a state prepared as a superposition of a coherent state and a vacuum state, using a generalized hybrid entangled state. By considering a setup that includes ...
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Quantum state teleportation plays a significant role in the field of quantum information transfer. In this article, we proposed the teleportation of a state prepared as a superposition of a coherent state and a vacuum state, using a generalized hybrid entangled state. By considering a setup that includes a beam splitter and a photon detector, and under appropriate conditions, successful teleportation of the entangled state composed of the coherent state and the vacuum state can be achieved.Furthermore, it has been shown that when considering entangled states of even or odd coherent states and the vacuum state, the success probability significantly increases to 0.5. These results indicate that the generalized hybrid entangled state plays a crucial role in the quantum teleportation of these states.
Hossein Ghaforyan; Habib Khalilpour; Majid Ebrahimzadeh; Mehmet Ertugrul; Emin Argun Oral; Fatma Nur Tuzluca Yesilbag; Yasar Ozkan Yesilbag; Sedanur Keles
Abstract
In this study, the electrical and thermal performance of composite wires made of copper coated with single-walled carbon nanotubes and a thermally conductive resin was investigated. Raman spectroscopy confirmed the successful synthesis of single-walled carbon nanotubes with an ordered crystalline structure, ...
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In this study, the electrical and thermal performance of composite wires made of copper coated with single-walled carbon nanotubes and a thermally conductive resin was investigated. Raman spectroscopy confirmed the successful synthesis of single-walled carbon nanotubes with an ordered crystalline structure, and scanning electron microscopy revealed a uniform distribution of the nanotubes and resin layer on the copper wire surface. The results from the resistivity and temperature versus current density and current intensity plots demonstrated that the composite wire outperformed the reference copper wire. Specifically, it exhibited lower resistivity at high current levels and maintained structural stability at higher temperatures. This enhanced performance can be attributed to the high electrical and thermal conductivity of the nanotubes, as well as the resin's stabilizing and heat-dissipating properties. Overall, the integration of carbon nanotubes and conductive resin into copper wire structures significantly improves thermal stability and current-carrying capacity, making this composite highly suitable for high-power applications, transmission lines, and sensitive electronic systems.
Vahdat Rafee; Alireza Razeghizadeh; Parisa Farhadi Birgani
Abstract
This study explores the impact of natural pigments from eggplant peel and purple cabbage, combined with the synthetic pigment N719, on the power conversion efficiency of DSSC cells. Zinc oxide (ZnO) nanoparticles were synthesized using the Sol-Gel method and deposited onto the photoanode via the Doctor ...
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This study explores the impact of natural pigments from eggplant peel and purple cabbage, combined with the synthetic pigment N719, on the power conversion efficiency of DSSC cells. Zinc oxide (ZnO) nanoparticles were synthesized using the Sol-Gel method and deposited onto the photoanode via the Doctor blade technique. Five DSSC samples were sensitized with different dyes: DSSN1 with eggplant peel, DSSN2 with red cabbage, DSSN3 with N719, DSSN4 with a 1:1 mixture of eggplant and cabbage dyes, and DSSN5 with an equal mixture of eggplant, cabbage, and N719 dyes. X-ray diffraction (XRD) confirmed the hexagonal structure of ZnO with an average crystallite size of 32.30 nm. Scanning electron microscopy (SEM) showed a porous anode surface with nanoparticles averaging 28.46 nm, allowing efficient penetration of the electrolyte and dye. UV-Visible spectroscopy revealed that the three-dye combination had the broadest absorption spectrum (400–700 nm) and the lowest energy band gap (2.14 eV). Photovoltaic testing using a PnuAhwaz-SOL simulator showed that DSSN5 achieved the highest efficiency of 1.46%. Combining natural and synthetic dyes enhanced DSSC efficiency significantly. The cell sensitized with two natural dyes showed an 18% higher efficiency than with a synthetic dye, and the three-dye combination increased efficiency by 100%. This approach also offers low production cost and eco-friendly benefits.
Rostam Moradian; Masome Naseri Tekyeh
Abstract
The ZnSe and ZnSe/Cu thin films successfully prepared using the vacuum evaporation method. Their optical properties investigated using UV-vis spectroscopy. The ZnSe thin film showed better transmission in the transparent region than the ZnSe/Cu thin film. The refractive index of the ZnSe sample depends ...
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The ZnSe and ZnSe/Cu thin films successfully prepared using the vacuum evaporation method. Their optical properties investigated using UV-vis spectroscopy. The ZnSe thin film showed better transmission in the transparent region than the ZnSe/Cu thin film. The refractive index of the ZnSe sample depends on the wavelength at low wavelengths, but at wavelengths longer than 600 nm, it is independent of wavelength and has a constant value of about 1.5. For the ZnSe/Cu sample, the refractive index shows slight dependence on the wavelength and has an almost constant value between 1.5 and 1.6. The samples' extinction coefficient decreases with increasing wavelength. The real and imaginary parts of the dielectric constants illustrated the same behavior as the refractive index and extinction coefficient, respectively. From this study, it can be indicated that both thin films with these optical properties are suitable for optoelectronic applications.
Elahe Namvari; Saeed Shojaee
Abstract
The increasing use of group III nitride structures in electro-optical devices, as well as the development of studies on the light-emitting structures and optical properties of these devices, including lasers, photodiodes, and detectors, have caused intense interest of scientists in this field. Since ...
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The increasing use of group III nitride structures in electro-optical devices, as well as the development of studies on the light-emitting structures and optical properties of these devices, including lasers, photodiodes, and detectors, have caused intense interest of scientists in this field. Since in some cases the size of the diameter of the nanowire was not suitable for observing the quantum confinement effects, combinations of quantum wells resulting from different structures of growth and layering inside the nanowires, known as hybrid structures, have been considered. These quantum wells are formed directly on the faces of the nanowires or along the axis and create the proper arrangement to induce quantum confinement effects. In this article, a suitable numerical solution defined for accurate calculation of band structure, wave functions, carrier probability density and its distribution, and the luminescence spectrum caused by spontaneous emission due to pollution in this system. Also, in this article, the effects of polarization are investigated in theoretical calculations based on the structural information of AlGaN/GaN hybrid semiconductor nanowires in two forms, quantum disk and core-shell, and its effect on emission luminescence is calculated, which can be obtained with widely used experimental samples. It is a comparison. The performed numerical calculations are based on the self-consistent solution of Schrödinger and Poisson, along with explanation of how the particles move and their distribution probability, which is very good in terms of accuracy compared to similar works
Neda Ahmadi
Abstract
This study systematically analyzed a lead-free perovskite solar cell based on Cs₂PtI₆ (Cesium Platinum Iodide) using the Solar Cell Capacitance Simulator (SCAPS-1D). The investigation focused on the effects of perovskite layer thickness, temperature, and defect density on key photovoltaic parameters. ...
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This study systematically analyzed a lead-free perovskite solar cell based on Cs₂PtI₆ (Cesium Platinum Iodide) using the Solar Cell Capacitance Simulator (SCAPS-1D). The investigation focused on the effects of perovskite layer thickness, temperature, and defect density on key photovoltaic parameters. The calculated parameters are open-circuit voltage, short-circuit current, fill factor, efficiency, and quantum efficiency of the solar cell. The model structure was utilized as a proposed n-i-p device architecture comprising ITO/TiO₂/Cs₂PtI₆/CBTS/Au.The results indicate that optimizing the perovskite layer thickness, provided it does not exceed the charge carrier penetration depth, can increase the efficiency by up to 29.2%. Conversely, increasing the operating temperature by approximately 110 K results in a 10.7% efficiency reduction. Furthermore, a significant decline in efficiency (36.8%) observed due to defect-induced recombination within the perovskite layer. These findings highlight the importance of material optimization and operational stability in the design of efficient, lead-free perovskite solar cells.
Samane sadat Ahmadi; Seyed Ali Hashemizade Aghda
Abstract
In recent years, perovskite solar cells (PSCs) have experienced rapid and unprecedented development and have become candidates for solar cells. Among perovskite solar cells, metal halide perovskite solar cells are known as one of the recent innovations in the field of renewable energy. These cells have ...
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In recent years, perovskite solar cells (PSCs) have experienced rapid and unprecedented development and have become candidates for solar cells. Among perovskite solar cells, metal halide perovskite solar cells are known as one of the recent innovations in the field of renewable energy. These cells have received much attention due to their high efficiency. One of the main advantages of these cells is the ease of production and the possibility of optimizing their electronic properties. Also, their ability to absorb light at different wavelengths can lead to an increase in energy conversion efficiency. However, there are still challenges such as sustainability and long-term life, which require further research. Since the efficiency of perovskite metal halide solar cells can be significantly increased by changing the band gap and improving the structure, in this article, by changing the dimensions of perovskite metal halide, which all have lead and iodine in their structure, the band gap is improved. The use of Quantum Espresso software package has been calculated and the appropriate band gap interval has been investigated to increase efficiency for use in solar cells.