We've all seen a solar panel whether it is on a calculator or on the side of a roof, theoretically with enough sunlight solar panels will last forever. Photovoltaic Cells work by changing photons into electrons. many materials are used in this process but silicon is the most commonly used material. Basically when light strikes this cell a certain portion of it is absorbed within the semiconductor material. This means that the energy of the absorbed light is transferred to the semiconductor. The energy knocks electrons loose, allowing them to flow freely.
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