15.76% efficiency perovskite solar cells prepared under high relative humidity: importance …
We report here an efficient method for preparing high efficiency CH3NH3PbI3 perovskite solar cells under high relative humidity, where the morphology of PbI2 was found to be of crucial importance. CH3NH3PbI3 was formed on a mesoporous TiO2 layer by a two-step spin coating method. During the first-step spin-c