Exploitation of solar energy for the elaboration of zinc oxide thin films according to a new method of solar spray pyrolysis

The deposition of thin films is done by several methods such as physical process (PVD), chemical process (CVD), spray pyrolysis is part of these methodes, where heat is required as the main factor, in this work we used the sun as a source of heat. For this purpose a parabolic concentration system was used, which offers the possibility to produce heatfrom solar energy, where temperatures can easily exceed 800°C and the conversion efficiency is high generally. By exploiting direct solar radiation, considered the main resource, which is very considerable on a planetary scale, this technology offers a real alternative to the consumption of fossil resources with a low environmental impact and a strong potential for cost reduction. The parabolic geometry of this device allows all the light rays falling on the surface of the parabola to be concentrated in one point where the cooking dish is placed (focus). The power of this device depends of course on the size of the parabola. The elaboration of the thin layers based on zinc oxide is done at well determined conditions, allows these conditions the temperature, where it is chosen at400C°. for that, a geometrical study on the parabolic solar concentrators was made to determine the various parameters which allow to wait for this temperature with the solar radiation of 950 W/m
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[1]. after the dimensioning of the concentrator one elaborated a series of ZnO to see their effectiveness