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Solar cells are a light effect to your devices that convert sunlight to electricity (by the construction of solar cells solar panels). Can produce the photovoltaic effect there are many kinds of materials, such as: monocrystalline silicon, polycrystalline silicon, amorphous silicon, gallium arsenide, Copper Indium selenium. Their power principle is basically the same, is now a case of Crystal light generation process described. P-type silicon crystals after phosphorus-doped n-type silicon to form a p-n junction. When light irradiation surface of solar cells, some photons absorbed by the Silicon material; passed to a silicon atom photon energy, making the electronic moving, becoming free electrons in the p-n junction agglomeration formed a potential difference on both sides, when external connected circuit, under the effect of the voltage will have some output current flow through the external circuit. This is the essence of the process: the process of photon energy conversion into electricity.
"SI" is our store one of the abundance of material on the planet. Since the 19th century after scientists discovered the semiconductor properties of crystalline silicon, it practically changed everything, even the human mind, late 20th century. Everywhere in our life "Silicon" figure and role of crystalline silicon solar cells is formed fastest industrialization in nearly 15 years. Production processes can be broadly divided into five steps: purification process b, a, c, d the slicing process, bar drawing process system of battery e, the packaging process.
In the 60 's, scientists--communications satellite has been the application of solar cells in space technology-powered, the last century, in the human process of introspection, for photovoltaic power generation this clean and direct forms of energy have been more cordial, not only in space applications, in many areas also show their talents. Such as: household solar street lights, solar power generation independent of power supply systems, PV water pumping systems, village (drinking water or irrigation), communications, power, oil pipeline cathodic protection system, optical fiber communication station power, desalination system, road signs, highway signs in the town. In the centuries before and after the period, and other advanced countries in Europe and photovoltaic power generation into city power system and power supply system into the development direction of nature in remote villages. Combination of building systems and solar cell industrialization trend has emerged.
Technical parameters of the solar cell
1 standard test conditions: AM1.5 light intensity, 1000W/m2,t=25 ℃;
2, photoelectric conversion efficiency: 15%
3, solar panels, open circuit voltage: 21.5V
Optimum operating voltage 4, battery plate: 17.5V
5, insulation resistance: more than 200 euro
6, the fill factor FF%:70%
7, the service life is greater than 20 (use efficiency is greater than the original 20 year efficiency 90%)
