Solar Cells

At the heart of any photovoltaic system is the solar cell, or photovoltaic cell. It is a semiconductor device, normally made from silicon. Crystalline silicon solar cells may be made using monocrystalline, polycrystalline or ribbon silicon wafers. The cost and performance of these are similar. Thin film photovoltaic cells use much thinner layers (around 0.001mm) of semiconductor deposited on glass or other supporting material, and include amorphous silicon, cadmium telluride and copper indium diselenide. At present they are less efficient than crystalline silicon cells.

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