INFLUENCE OF THE SOLVENT AND THE RATIO OF STARTING REAGENTS ON THE PROPERTIES OF ORGANIC-INORGANIC PEROVSKITE MAPbI3

Abstract

The peculiarities of formation and properties of organiс-inorganic MAPbI3 perovskite films, obtained from solutions with different ratios of starting reagents (PbI2:MAI = 1:1,1:2, and 1:3), in the DMF and DMSO solvents, studied. As the PbI2:MAI ratio increases, the temperature of the formation of a single-phase MAPbI3 perovskite film also increases. The slight changes in the structural and electrophysical characteristics for perovskite films obtained at the  different ratios of PbI2:MAI in DMF and DMSO were found. These changes are related to the solvent that is included in the crystalline structure of perovskite. In the same ratios of starting reagents, DMF is included in the structure of perovskite in a greater amount than DMSO.