The US Intensity Department's Countrywide Renewable Intensity Lab, NREL has announced a world keep a record of 31.1% conversion efficiency for a two-junction solar cell under one sun of strike.NREL Scientist Myles Steiner announced the new keep a record June 19 at the 39th IEEE Photovoltaic Specialists Conference in Tampa, Florida. The preceding keep a record of 30.8% efficiency was open by Alta Procedure.The tandem cell was finished of a gallium...