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Hp Laserjet 4250 Drivers & Install, software for Windows
HP LaserJet 4250 Software for Mac OS X
HP LaserJet Printer series Software and Driver Downloads | HP® Customer Support
HP LaserJet 4250 Printer series
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Solar panels made from organic materials are four times cheaper than silicon ones

New material for solar cells created at Ohio State University. Its advantage is its low cost, which, according to the developers, will allow it to compete with traditional sources of electricity. Based on the existing developments in this area, scientists were able to bring new elements closer to the inorganic elements from silicon in terms of conversion efficiency. What’s more, they promise that within a few years, electricity from organic solar panels will be able to compete in price with electricity supplied by the grid.

A typical amorphous polycrystalline silicon solar cell has an efficiency of 10-15%. Monocrystalline silicon cells have a higher efficiency, but are significantly more expensive. The use of special techniques allows you to achieve very high efficiency in the laboratory. An element based on organic dyes (organic dye-sensitized solar cell, DSSC), created by university specialists, shows an efficiency of just below 9%, but in terms of production cost it is four times more attractive than its silicon counterparts.

The DSSC works by absorbing photons in an inexpensive thin-film structure containing dye molecules “fixed” in a titanium oxide layer deposited on a glass or plastic substrate. The absorption of a photon leads to the excitation of a dye molecule, from which electrons are released. They fall into the titanium oxide layer, through which they are transmitted to the negative terminal of the element. Previously, two approaches have been tried to increase the usable area of ​​the element. In one, a photosensitive layer was applied to the surface of nanoparticles, in the other, to the surface of nanotubes.

Using nanoparticles increases the area but makes it harder for electrons to move. Nanotubes are devoid of this drawback, but they do not significantly increase the useful area. Scientists from Ohio decided to combine both approaches by mixing nanoparticles and nanotubes, which allowed them to achieve high conversion efficiency.

Source: EE Times

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