A facile method for the synthesis of large scale high quality MAPbI3 perovskite for diverse applications

High quality methylammonium lead iodide (MAPbI3) perovskite powder was prepared by anti-solvent assisted method in large scale. Structure, optical and morphology were tuned with respect to the temperature. Four different structures such as intermediate, mixed or polycrystalline, tetragonal and cubic were prepared. The absorption edge of the tetragonal MAPbI3 was located at about 850 nm, indicating that the band gap of MAPbI3 is approximately 1.48 eV, which is close to the theoretical results and smaller than those derived from polycrystalline and thin-films. MAPbI3 powder exhibits relatively wide absorption (from 250 nm to 850 nm) and good thermal stability.