Arturo Morales-Acevedo

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Manufacturers of photovoltaic panels typically provide electrical parameters at only one operating condition. Photovoltaic panels operate over a large range of conditions so the manufacturer s information is not sufficient to determine their overall performance. Designers need a reliable tool to predict energy production from a photovoltaic panel under all(More)
Small grid-connected photovoltaic systems up to 5 kWp are often not monitored because advanced surveillance systems are not economical. Hence, some system failures which lead to partial energy losses stay unnoticed for a long time. Even a failure that results in a larger energy deficit can be difficult to detect by PV laymen due to the fluctuating energy(More)
Reconfigurable architectures are of great interest to system designers to improve the system’s operation and efficiency. In this paper, we propose an adaptive utility interactive photovoltaic (PV) system based on a novel Flexible Switch array Matrix topology. This proposed system maximizes the generated power in real-time in response to operational(More)
We report on the results of the investigation of optical properties and structure of PECVD deposited thin films of hydrogenated polysilicon determined by UV–Vis and IR spectroscopy. The influence of the hydrogen dilution of silane plasma at the PEVCD deposition on the film properties was investigated. The refractive index, the optical band gap energy and(More)
A photovoltaic (PV) module simulator was developed based on an equivalent circuit with one-diode, taking into account variations of the solar irradiation and the temperature. The parameter estimation was carried out using the datasheet values provided by manufacturers and by solving a system of equations established from the physics of solar cells that(More)
Low pressure chemical vapor deposition (LPCVD) silicon oxynitride (SiON) films of various compositions between SiO2 and Si3N4 were grown by changing the relative ratio (Ro) of nitrous oxide (N2O) to silane (SiH4) pressures while keeping constant the ammonia (NH4) pressure. The SiON films were deposited at 700 o C on p-type silicon substrates (with a carrier(More)
The doping concentration and the thickness of different layers in the Hetero-junction with Intrinsic Thin layers solar cells (HIT) strongly influence their performances. We simulated, using AFORS-HET simulation software, the following layers structure: ZnO/a-Si:H(n)/a-Si:H(i)/c-Si(p)/a-Si:H(p)/Ag. We optimized the thicknesses and doping concentration of the(More)
Mono and polycrystalline silicon solar cell modules currently represent between 85 and 90% of the PV world market. The reasons are the stability, robustness and reliability of this kind of solar cells as compared to those of emerging technologies. Then, in the mid-term, silicon solar cells will continue playing an important role for their massive(More)
Polycrystalline films of semiconducting Cu(In<inf>1&#x2212;x</inf>Ga<inf>x</inf>)Se<inf>2</inf> (CIGS) quaternary alloy, one of the promising materials for photovoltaic applications, have been prepared by means of chemical spray pyrolysis (CSP). Copper, Indium and Gallium metal chlorides and Selenourea are used as constituent elements to prepare spray(More)
The specific contact resistivity (rho<sub>C</sub>) for Aluminum (Al), Silver (Ag) and Indium (In) metallic contacts on CuInS<sub>2</sub> thin films have been determined, from I - V measurements, with the purpose of having the most appropriate ohmic contact for TCO/CdS/CuInS<sub>2</sub> solar cells. rho<sub>C</sub> was measured using the transmission line(More)