Solar cell
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Abstract from DBPedia |
太陽電池(たいようでんち、英: solar cell)は、光起電力効果を利用して、光エネルギーを電気エネルギー(電力)に変換する電力機器である。主に、太陽光から電力を得る目的で使用される。"電池"と表現されるが、電力を蓄える蓄電機能は持っていない。タイプは大きく分けてシリコン系、化合物系、有機系がある。 (Source: http://dbpedia.org/resource/Solar_cell) A solar cell, or photovoltaic cell, is an electronic device that converts the energy of light directly into electricity by the photovoltaic effect, which is a physical and chemical phenomenon. It is a form of photoelectric cell, defined as a device whose electrical characteristics, such as current, voltage, or resistance, vary when exposed to light. Individual solar cell devices are often the electrical building blocks of photovoltaic modules, known colloquially as solar panels. The common single junction silicon solar cell can produce a maximum open-circuit voltage of approximately 0.5 volts to 0.6volts. Solar cells are described as being photovoltaic, irrespective of whether the source is sunlight or an artificial light. In addition to producing energy, they can be used as a photodetector (for example infrared detectors), detecting light or other electromagnetic radiation near the visible range, or measuring light intensity. The operation of a photovoltaic (PV) cell requires three basic attributes: * The absorption of light, generating excitons (bound electron-hole pairs), unbound electron-hole pairs (via excitons), or plasmons. * The separation of charge carriers of opposite types. * The separate extraction of those carriers to an external circuit. In contrast, a solar thermal collector supplies heat by absorbing sunlight, for the purpose of either direct heating or indirect electrical power generation from heat. A "photoelectrolytic cell" (photoelectrochemical cell), on the other hand, refers either to a type of photovoltaic cell (like that developed by Edmond Becquerel and modern dye-sensitized solar cells), or to a device that splits water directly into hydrogen and oxygen using only solar illumination. Photovoltaic cells and solar collectors are the two means of producing solar power.太陽光発電(たいようこう はつでん、またはソーラー発電、英: Photovoltaics,Solar photovoltaics、略してPVともいわれる)は、太陽光を太陽電池を用いて直接的に電力に変換する発電方式である。大規模な(特に設備容量が1メガワットを超える)太陽光発電所は「メガソーラー」とも呼ばれる。再生可能エネルギーである太陽エネルギーの利用方法の1つである。 (Source: http://dbpedia.org/resource/Solar_cell) |