Report on crystalline and stable α-FAPbI3 and Pb-Sn perovskite from scalable techniques.

This deliverable is related to T1.1 and aims at increasing the crystallinity and enhance the stability both of -FAPbI3 and Pb-Sn perovskite by addition of large organic cations and ionic liquid additives. The long organic cations, mostly containing an ammonium group have the double role of slowing down the crystallization and passivating surface and grain defects. Ionic liquids will be used to tune the crystallization and decrease the crystallization defects