Perovskite semiconductor solar cells are a very exciting photovoltaic technology possessing similar efficiencies to silicon but cast or printed in thin films via liquid inks. A new method that uses a simple sheet of paper to deposit the perovskite films that does so without any expensive equipment at all has been developed .
Italian and Iranian scientists have replaced spin-coating with a simple piece of paper in a process to make perovskite solar cells. Spin coating is much li