December 29, 2008
Solar cells produce more on
Tip vanishingly thin solar cells on
end and you can boost the amount of sunlight the cells convert to
The solar cells have reflective layers on either side that
guide light waves. Sunlight enters at one end, then bounces between
the two sides, allowing the cell to absorb more light. The perpendicular
orientation also makes it possible to keep the part of the cell that
absorbs light very thin, which is important for getting as many electrons
as possible out of the cell.
Apply the waveguide to a dye-sensitized solar cell and you
increase the cell's conversion efficiency by 4.3 times.
The technique can be used with many types of solar cells.
It also promises to make it easier to combine multiple solar cells
that absorb different parts of the solar spectrum.
Waveguide Enhanced Photovoltaics
Optics Express, December 22, 2008
Group, Bar Ilan University
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