NREL Scientists Report First Solar Cell Producing More Electrons In Photocurrent Than Solar Photons Entering Cell


  • NREL Scientists Report First Solar Cell Producing More Electrons In Photocurrent Than Solar Photons Entering Cell

    Researchers from the U.S. Department of Energy's National Renewable Energy Laboratory (NREL) have reported the first solar cell that produces a photocurrent that has an external quantum efficiency greater than 100 percent when photoexcited with photons from the high energy region of the solar spectrum. The external quantum efficiency for photocurrent, usually expressed as a percentage, is the number of electrons flowing per second in the external circuit of a solar cell divided by the number of photons per second of a specific energy (or wavelength) that enter the solar cell. None of the solar cells to date exhibit external photocurrent quantum efficiencies above 100 percent at any wavelength in the solar spectrum.

    The external quantum efficiency reached a peak value of 114 percent.

    webmasters comment:

    i would guess such cells should be build into an "energy lense" - that would concentate and as we read, multiply the current and use it in combination with such nano materials as we have seen few days back. How great could this world be if all this creative power would be given as much attention and our moneys as the deadly nuclear industry.

    Source: globalenergywatch.com