Department of Energy researchers claimed Wednesday to have broken the world record for efficiency in a solar cell.
Their cell converted 40.8 percent of light into electricity at the National Renewable Energy Laboratory in Golden, Colo. They subjected the cell to the equivalent concentrated light of 326 suns.
Researchers grew the solar cell upside down on a wafer of gallium arsenide rather than thick germanium, and then removed the wafer.
The development could lead to flexible, lightweight solar cells used in land-bound, concentrated photovoltaics as well as in space satellites.
The previous record for photovoltaic efficiency was 40.7 … Read more