EE Times: Scientists at the U.S. Department of Energy’s National Renewable Energy Laboratory (NREL) have claimed a world record in solar cell efficiency with a photovoltaic device that converts 40.8 percent of the light that hits it into electricity. This is the highest efficiency of any photovoltaic device to date, NREL said in a statement. The figure was achieved with an inverted metamorphic triple-junction solar cell designed, fabricated and independently measured at NREL. The 40.8 percent …