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Solar cell manufacture. Worker inspecting photovoltaic, or solar cells, during their manufacture. Photovoltaic cells are made of a semiconductor material such as silicon or gallium arsenide. The electrons in the semiconductor are loosely bound to their atoms and can be liberated by the addition of energy. The electrons released when light energy hits the cells will be collected by wires running over the surface of each cell and used to make an electric current. Panels of photovoltaic cells are used to supply large quantities of electricity.
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