Ultrathin Solar Cells Reach a Record of Nearly 20% Efficiency Updated On Wed, Aug 14th, 2019 by Saurenergy C2N has succeeded in trapping sunlight with 20 percent efficiency in a solar cell with an ultrathin absorbing layer of GaAs on nanostructured back mirror Researchers at the Centre de Nanosciences et de Nanotechnologies (C2N), in collaboration in particular with researchers at the German Fraunhofer ISE, have succeeded to trap sunlight efficiently in a solar cell thanks […] Read more