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Photovoltaic devices as large-area semiconductor devices are macroelectronic devices, however, solar cells include nanostructures and/or nanomaterials to boost the conversion efficiency of the devices. In this contributions we focus on nanotextures which play an important role in increasing optical performance of solar cells. We present a method of nanotexture fabrication for PV applications based...
This work reports the recent advances on the synthesis and characterization of thin Cu2ZnSnS4 (CZTS) films prepared by chemical solution deposition. CZTS colloids dispersed in water-ethanol solutions were used as precursors and prepared by coprecipitation by mixing CuCl2-2H2O, ZnCl2, SnCl2 and thiourea (NH2)2CS in water-ethanol mixtures. The CZTS films were deposited on glass substrates by spin-coating...
In this work, the characteristics of a Si-solar cell (PV) model is studied. The proposed modelis a four layer system with an ultra-thin film of Fe-InGaAsPlaid above Silicon (Si) substrate and covered by AlON layer that is exposed to air directly. The efficiency is measured by the reflectance power (R) and transmittance power (T). R and T are derived by using the transfer matrix method for both TE...
Semiconductor electronic and optoelectronic materials and devices have experienced very rapid development for more than half a century. However, there still remains a lack of closely lattice-matched materials and substrates suitable for the monolithic integration of various kinds of semiconductor devices on a single chip. A new material platform: II-VI (MgZnCdHg)(SeTe) and III-V (AlGaIn)(PAsSb) semiconductor...
This paper proposes a planar broadband circularly polarized patch antenna integrated with metasurface solar cells. The antenna is composed of a square patch with a diagonal slot sandwiched between a metasurface, which is implemented with a lattice of 4 × 4 square solar cells, and the ground plane. This arrangement allows 100% exposure of the solar cells to sunlight. The broadband characteristic is...
We report on the evaluation of coherent scattering domain sizes, microstrains, microstresses, and average density of dislocations in CZTS films deposited by pulsed spray pyrolysis technique by atomizing different volumes of initial solution. CZTS films deposited at V= 5 ml are suitable for application in 3rd generation thin-film solar cells.
We report on the structural properties of Cu2ZnSnS4 (CZTS) thin films deposited by using nanoink spraying process and annealed at different temperatures Ta = (523–723) K and duration ta = (2–10) min under the ambient atmosphere. The effect of annealing conditions on the phase composition, lattice parameters (a, c, c/2a), unit cell volumes (Vunit) and coherent domain sizes (L) was investigated. CZTS...
Are investigated photovoltaic and electrotransport properties of film polymeric compositions on the basis of P3HT:PCBM and silver nanoparticles. It is shown that significant increase in efficiency of a cell is observed at sedimentation of silver nanoparticles on ITO surface. Sedimentation of silver nanoparticles on a surface of a layer of PEDOT:PSS and a doped in the volume of P3HT:PCBM leads them...
In this paper, Ti-doped GaZnO (GTZO) quaternary alloys were used as the transparent conductive oxides (TCOs) for Cu(In, Ga)SeSe2 (CIGS) solar cell application. These thin films are highly favorable for solar power systems. Photoluminescence measurement and X-ray diffraction were employed to investigate the GTZO thin films. Advantageous crystal quality was produced by radio-frequency magnetron sputtering...
Flexible ITO-lree P3HT:PC61BM solar cells with spin-coated silver nanowire transparent electrode are demonstrated. For conventional structure type of solar cells, the power conversion efficiency (PCE) of devices based on silver nanowire can reach around 2.29%. As for inverted structure type, the PCE of devices can reach 3.39%. The conventional and inverted flexible ITO based P3HT:PC61BM solar cells...
In this study, we have discussed how grain sizes of CH3NH3PbI3 perovskites have an impact on the photovoltaic parameters such as a short-circuit current density Jsc, an open-circuit voltage Voc, and hence a power conversion efficiency PCE. As a result, we found that the device with larger grains exhibits the better photovoltaic parameters. The highest PCE was as high as 19.4%, which was obtained for...
Multi-junction solar cells based on III-V materials are widely utilized for space applications owing to their light weight and very high efficiency. When used for terrestrial applications, they are used in concentrator systems to boost the efficiency and reduce the effective solar cell area to enhance the performance-to-cost ratio. However, the efficiency drops as the light intensity goes beyond a...
This paper reports on deposition process of Zinc Oxide (ZnO) using a simple electrochemical approach. The ZnO thin film was deposited on the Aluminium (Al) substrate in an aqueous solution of Zinc Chloride (ZnCl2) at room temperature using two terminals electrochemical cell that consisted of positive and negative electrodes. Two types of Al substrate were used, which are Al foil and Al plate. Al foil...
III-nitrides InGaN solar cells have exhibited many favorable physical properties for space photovoltaic (PV) applications. Here we demonstrate the first nonpolar and semipolar InGaN/GaN multiple-quantum-well (MQW) solar cells grown on nonpolar m-plane and semipolar (2021) plane bulk GaN substrates. The optical properties and PV performance of these InGaN solar cells were systematically studied, including...
Despite the rapid development of dye-sensitized solar cell since its early breakthrough by Graetzel in 1991, further development on the design and fabrication technique still constitutes a major challenge for this type of solar cell to reach the mass production and marketing level. Generally, the upscaling of dye-sensitized solar cell for daily utilizations necessitates the interconnection of multiple...
In this presentation, we report a simple and effective method for improving the performance of CH3NH3PbI3 perovskite solar cells. By employing a novel hot-air annealing process (HAAP) and a merged annealing method (MA) for preparing the perovskite CH3NH3PbI3 film, we could successfully enhance the crystallinity of the CH3NH3PbI3 active layer and improve its photon collection properties. This led to...
The photosensitizer methylene blue (MB) has been investigated as a deoxyribonucleic acid (DNA) intercalant with the main objective of understanding the chemical/physical processes, which occur when adequate wavelength light is impinging on DNA intercalated with MB. This understanding is crucial for the creation of dynamic phototherapy procedures and for the development of new dye sensitized solar...
Quasi-monocrystalline germanium (QMC Ge) is investigated for potential applications in high-efficiency, low-cost multi-junction solar cell design. The morphology and electrical resistivity of QMC Ge is characterized and computer simulations of MJSCs on Si substrates using QMC Ge interface layer are developed.
Three-dimensional integrated circuits are a natural platform for IoT devices. IoT devices exhibit a small footprint, integrate disparate technologies, and require long term sustainability (extremely low power or self powered). A hybrid energy harvesting system within a three-dimensional integrated circuit is proposed in this paper. The harvesting system exploits different types of energy available...
The purpose of this work is to study the anti-reflection coating structure with spherical SiO2 micro particles for the single-crystalline silicon solar cell applications. With the single and double SiO2 micro-sphere texturing anti-reflection coating structures, the surface reflectivity of the single-crystalline silicon substrate can be reduced to an average value of 5.8% and 2.85% respectively, in...
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