solar cell Articles
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Photodetectors and solar cells with Ge/Si quantum dots parameters dependence on growth conditions
In this paper recommendations for growth conditions necessary for achieving maximum detectivity of infrared photodetectors with quantum dots and efficiency of quantum dot solar cells are given. It is also shown that for improvement of photodetectors characteristics quantum dots should be grown at rather high temperatures, and, on the contrary, at relatively low temperatures for maximisation of ...
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Optimisation of the physical properties of InAs/InGaAs/GaAs QDs heterostructures embedded p–i–n GaAs solar cell
In order to enhance absorption at infrared range for GaAs–based solar cell, we have grown multi–stacked InAs/InGaAs/GaAs quantum dots (QDs) heterostructure in the active region by Solid–Source Molecular Beam Epitaxy (SS–MBE). Two different families of dots were observed in the photoluminescence (PL) spectra. Temperature–dependent study was carried out at 10–240 K temperature range. Distinctive, ...
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Development of Materials and Interface Engineering Technologies for Dye-Sensitized Solar Cells
During the past decade, refinements in the chemical components of solar cells, improvements in cell physics, and device engineering have led to remarkable enhancement of dye-sensitized solar cell performance. These enhancements canpotentially provide low-cost, large-area, flexible, and high efficiency solar cells for all Partner countries. The goal of this project is to develop materials and ...
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A 21.5% efficiency silicon solar cell
SunPower Corp., a subsidiary of Cypress Semiconductor Corp., announced that its A-300 silicon solar cell had been measured at 21.5 percent efficiency by the National Renewable Energy Laboratory (NREL) in Golden, Colorado. SunPower’s A-300 solar cell was manufactured in the company’s Round Rock, Texas pilot line. SunPower’s A-300 solar cells offer a significant efficiency improvement over ...
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Cu
2Te solar cells fabricated by printingCu2Te particles were synthesised by ball milling and then printed on an In2S3/TiO2/FTO–glass substrate, resulting in superstrate–structured solar cells. The as–prepared Cu2Te particles were amorphous, but their crystallinity was improved after annealing at 400–650°C. The Cu2Te particles annealed at 400°C, melted partially, and a completely melted Cu2Te film was obtained at annealing temperatures ...
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Roll-to-roll processing of single junction modules
To come to a sustainable energy production, we need large amounts of solar cells. For perovskite solution based printing techniques are available, so the future perovskite solar modules are printed on flexible carriers. Roll-to-roll processes are researched by Ilker Dogan at Solliance Solar Research. He will tell you about the latest developments on roll-to-roll deposition processes for ...
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The effect of surface impurities on photovoltaic panels
Abstract. This paper deals with the surface impurities that occur onto operating solar cells, a widespread problem. The depositions on the photovoltaic cells, represented by dust and dirt which appear inevitably, lead to deterioration over time or to the decrease of efficiency of the panels that contain the affected cells, and as a result there are losses that appear in the system. Some local ...
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Modelling of thin–film tandem solar cells
Numerical modelling of thin–film tandem solar cells is investigated using PC–1D program. The program is adapted to simulate the performance of multi–junction solar cells. Cadmium–zinc telluride (Cd0.6Zn0.4Te) is chosen as an absorber layer material for the wide band gap top cell and copper indium diselenide (CuInSe2) is chosen as an absorber layer material for the bottom cell in the whole tandem ...
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Effect of temperature in electrochemical texturising of multi–crystalline silicon in KOH solution
In this paper we present the study of electrochemical etching of silicon in KOH solutions to improve texturisation and reflection properties of p–type multi–crystalline silicon. The influence of etching temperature on surface morphology and reflection properties of the silicon wafers has been investigated. The results of the study showed that etching at high temperatures formed isotropic textured ...
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The comparison of several silicon solar cells
The solar cell is also known as the "solar chip", it is a kind of photoelectric semiconductor wafer that works by solar energy. Solar energy refers to solar radiation energy. Since the formation of the earth, organism mainly light and heat, provided by the sun to survive, and as a method of food preservation, such as salt and salted fish. But nowadays, the application of solar energy gathered ...
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Simulation and performance analysis of superstrate Cu(In,Ga)Se 2 solar cells using nanostructured Zn 1– x V x O thin films
In this paper, we describe in the first step the structural, electrical and optical properties of the nanostructured Zn 1– x V x O thin films deposited on glass substrates by rf-magnetron sputtering using aerogel nanoparticles synthesised by the sol–gel method. The best properties, satisfying the role of window and buffer layers, were achieved, respectively, for the films ...
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Cobalt Chloride Hexahydrate Proves Effective in Suppressing Energy Loss in Perovskite Solar Cells
Perovskite solar cells are a promising next-generation photovoltaic technology that has gained significant attention in recent years. With their low-cost production, high efficiency, and versatility, perovskite solar cells have the potential to revolutionize the renewable energy sector. However, one of the challenges facing researchers is reducing energy losses within perovskite solar cells to ...
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Power management policies and control of hybrid electric vehicle
With increasing concern over the environment and ever-stringent emission regulations, the use of hybrid electric vehicle (HEV) is being investigated as an alternative form of transportation. A hybrid vehicle combines the advantages of an electric drive and an internal combustion engine. This paper proposes the necessary hardware and software needed for an effective control of the electrical part ...
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Improving Photovoltaic Efficiency
Photovoltaic efficiency improvements are key to improving the performance of solar cells.The photovoltaic effect (the conversion of light to electricity) was discovered in 1839 by Edmond Becquerel, and is the foundation of solar cells. Since the 1950’s the efficiency of solar cells have increased from 4% in the 1950’s to over 20% today, and research is ongoing to further improve photovoltaic ...
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Performances of natural dye–sensitised solar cells - a brief review
Dye–sensitised solar cells (DSCs), also called as photoelectrochemical cells, have the potential of commercial viability and are the most promising photovoltaic devices among the new generation of renewable energy systems. The dye used is responsible for the light harvesting efficiency and electron injection efficiency of the DSC. Vast amount of work has been done on the performance of DSCs with ...
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Highly crystalline hydrothermal ZnO nanowires as photoanodes in DSCs
Vertically aligned ZnO nanowires (NWs) were prepared inside an autoclave by a hydrothermal procedure at temperatures above 100°C (HP). The effects of synthesis temperature and time on the morphology of ZnO NWs were carefully studied. The performance of HP ZnO NWs was compared with that of ZnO NWs grown by a conventional ambient pressure hydrothermal method at temperatures below 100°C (LP) ...
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Hanergy Solar UAV Project - Case Study
Project Name: Hanergy Solar UAV Project Location: Beijing Component technology: Alta Devices The UAV adopts Alta Devices' world leading gallium arsenide thin-film solar technology. The highest conversion rate of thin-film solar cells is as high as 31.6%. Public data shows that under the same area, it has performancetwo to three times compared to that of ordinary flexible solar cells, and ...
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New Antenna, merged with solar panels
The EPFL researchers have managed to merge antennas and solar cells in a mixed device that promises unprecedented efficiency. It is a first step towards the development of more compact and lighter satellites, but also to the improvement of mobile communication systems used in case of disaster. Traditionally, telecommunication antennas and solar cells do not mix. They must function independently ...
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Advanced system for calibration and characterization of solar cells
This paper presents high performance setup developed at the SolarLab to measure curient-voltage (I—V) curves of solar cells. The core of a setup is a steady light solar simulator of class A, according to specifications oflEC 60904-9 andASTM E927 standards. Available range of measurements enables us to characterise not only all kinds of silicon wafer-based solar cells but also thin film ...
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