Tuesday, February 12, 2008

A Solar Cell

A solar cell or photovoltaic cell is a mechanism that converts solar energy into energy by the photovoltaic effect. Photovoltaics is the field of expertise and research related to the application of solar cells as solar energy. Sometimes the term solar cell is reserved for devices intended expressly to confine energy from sunlight, while the term photovoltaic cell is used when the source is undetermined.

Assemblies of cells are used to make solar modules, which may in turn be linked in photovoltaic arrays.

Solar cells have many applications. Individual cells are used for powering small devices such as electronic calculators. Photovoltaic arrays create a form of renewable electricity, particularly useful in situations where electrical power from the framework is unavailable such as in remote area power systems, Earth-orbiting satellites and space probes, remote radiotelephones and water pumping applications. Photovoltaic electricity is also increasingly deployed in grid-tied electrical systems.

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