The main objective of researches in the field of photovoltaic is to increase the efficiency. This work aims a new concept which is the integration of nanoparticles in the anti-reflection layerSi3N4 (silicon nitride), in order to improve the performance of solar cells. This concept is based on the up conversion, where the nanoparticles are characterized by the ability to function as a converter of infrared rays having high energies in the receptivity in the visible. The concept of conversion leads to a better exploitation of the solar spectrum, by widening the useful range of the spectrum. Firstly, we realized SiNx layers at different compositions and proved that variation by calculating the silicon excess and the gap energy. But the focus is on the analysis of photocurrent measurements for the vertical and lateral configuration to show the role of nanparticules. And we finalize with measurement of currents at the test bench I-V to find the ideal stoichiometry for nanoparticles.
This work intends to present a method for efficient analysis of the phenomenon of degradation in photovoltaic cells in Saint Petersburg (Russia) and Algiers (Algeria). The data used contain weather parameters (T°, wind, solar radiation) for 10 years. The rates of degradation of Si- photovoltaic cells were obtained from the data. It was noted from the results of comparing various data that the main factor in the formation of the degradation process is the technology of manufacturing photovoltaic cells.
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