Solar nanoparticles improves efficiency of solar cells
6 October 2009Researchers at Ohio State University have found that by adding silver nanoparticles to the solar cell polymers, higher amount of electricity can be generated. The research team led by Paul Berger, professor of electrical and computer engineering and the finding of the research was published online in journal “Solar Energy Materials and Solar Cells.”
Researchers carried out experiment with and without silver nanoparticles and found that electricity generated per square centimeter is almost 12 percent higher for cells containing silver nanoparticles. Researchers argue that silver help in polymer to capture wider wavelength of sunlight and therefore enhances the output current. Berger and his team is hopeful in making these polymer solar cells available at an affordable cost and are more flexible than the existing polymer cells.
At present the overall efficiency of the existing solar cells is very low and the best products has efficiency of the order of 5 percent. For a long term commercially viable option, the efficiency of new generation polymer solar cells should be around 10 percent and the best way to achieve the targeted efficiency is to widen the absorbable wavelength range the sunlight.
A tailor made fabrication technique by which silver particles are encased in the ultra polymer layer, a layer that is kept below the light absorbing layer; so that the coating of silver not only prevents silver particles from clumping but also helps them in rearranging or self assembling in mosaic pattern so that more light is absorbed by the polymer cells.
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what happens to silver’s exiting state, if the silicon exiting merge what will happen then if these things looks great they the absorption energy between 2 of them cause the sourse power will be cut down i know one think so that we can use more power while incresing bandwidth of silicon so that electrons can accomadate in silicon energy band width full explaination can not be told by this type i can get u by ur ID