CH3NH3Cl Assisted Solvent Engineering for Highly Crystallized and Large Grain Size Mixed Composition (FAPbI3) 0.85 (MAPbBr3) 0.15 Perovskites

High-quality mixed-cation lead mixed-halide (FAPbI 3) 0.85 (MAPbBr 3) 0.15 perovskite films have been prepared using CH 3 NH 3 Cl additives via the solvent engineering method. The UV/Vis result shows that the addition of additives leads to enhanced absorptions. XRD and SEM characterizations suggest that compact, pinhole-free and uniform films can be obtained. This is attributable to the crystallization improvement caused by the CH 3 NH 3 Cl additives. The power conversion efficiency (PCE) of the F-doped SnO 2 (FTO)/compact-TiO 2/perovskite/Spiro-OMeTAD/Ag device increases from 15.3% to 16.8% with the help of CH 3 NH 3 Cl additive. View Full-Text