Painel Solar

Photovoltaic Cell
Photovoltaic cell is a solar cell powered by solar energy and it is a instrument which converts sunlight into electricity through photoelectric effects. The main theory which supports this fantastic technology is that some materials release electrons when they hit the rays of photon in the light, producing an electric current.
Photovoltaic cells with highest efficiency were being produced commercially by Boeing or SpectroLab, although similar cells with multi-layer system were close, but they were too expensive and they were used only for the most accurate applications. Thin film PV cells are produced lately in bulk as these are cheap and less fragile, but are at the most efficient by 20%. The most recent development is the demonstration of a new design with the efficiency of 85% in plain sunlight and that of 95% efficient at different wavelengths. It has been produced only for experimental in the laboratory as an example, but it may have a low cost production in bulk in the future.
Back-up power source to a satellite in 1958 was the earliest application of the photovoltaic cell powered by solar energy. The photovoltaic cell present in the solar panels powered by the solar energy gained application in other things than satellite only, after the energy crisis in the 70's. Because the high cost of solar cells, the photovoltaic cell was difficult to produce in the remote areas, including powering of telecommunication stations, off-shore oil rigs, railroad crossing, and navigational buoys with the help of solar power.
Germany became the leading country in the photovoltaic cell market all over the world since its capacity has increased from 100 MW to 4,150 MW between 2000 and 2007. Spain became the largest in the installation of these photovoltaic cells, while France, US, Italy, South Korea and other countries have been increasing the usage of solar power in their own countries, in terms of power output of domestic photovoltaic cells.
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