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The Most Important Characteristics of Silicon

• Silicon is an absolutely non-toxic and inexhaustible resource. It is the second frequently element to be found in the earth’s crust, and its best known deposit simply is silica sand (SiO2).
• The consumption of the expensive ultra pure silicones is reduced by at least 90 % compared to the conventional wafer technology. Layer thicknesses of about 20 µm or even less are sufficient enough to provide good efficiency grades of the cells.
• The solar cell can principally be refined onto module-sized surfaces like also practised by the other thin-layer technologies. An integrated connexion in series on a large substrate is possible, so that the complex connexion of the single cells into modules is significantly eased.
• The silicon solar cell benefits of the enormous technological potential of the micro- electronic and the traditional wafer-cell technology. For example, novel plasma technics being on the brink of acceptance by the industry for production of wafer-solar cells can be used, quasi without any effort of adaptation, for the production of solar cells.
• Solar cells principally can achieve as high and stable degrees of efficiency as solar cells of silicon wafers do. This was confirmed by the production of solar cells on thin silicon layers with ideal crystal attributes. Efficiency factors of about 19 % could be achieved even with 45 µm thin layers.