Tandem solar lays new perovskite cells over standard silicon cells. Perovskite absorbs the shorter wavelengths of light that silicon misses. So the thin layer of perovskite collects the visible wavelengths, and lets the near-infrared light through to the silicon underneath. Martina GrĂĽnwald and Sarah Michaud writing for the WEF point at the results of R&D and demonstrations in Germany, Switzerland, Saudi Arabia and China. Energy conversion … [Read more...]