David Kirkpatrick

September 30, 2008

Most efficient solar cells to date

From KurzweilAI.net — This is yet another in a long string of solar breakthroughs. The most efficient photovoltaic cells yet, converting almost 50% of harvested light into electricity. Kudos to the US Department of Energy’s National Renewable Energy Laboratory.

NREL Solar Cell Sets World Efficiency Record at 40.8 Percent
ElectricalEngineer.com, Sep. 29, 2008Scientists at the U.S. Department of Energy‘s National Renewable EnergyLaboratory (NREL) have set a world record in solar cell efficiency with a photovoltaic device that converts 40.8 percent of the light that hits it into electricity.

The new design uses compositions of gallium indium phosphide and gallium indium arsenide to split the solar spectrum into three equal parts that are absorbed by each of the cell‘s three junctions for higher potential efficiencies.

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