Perovskite-Based Solar Cells: Some Problems and Ways of their Solution

The fundamental aspects of the perovskite absorber formation of solar irradiation for two generally accepted one- and two-step technologies are considered. For the on-step variant, two stages of perovskite formation, called “through solution” and “intermediate colloid compounds of precursors”, were identified. The successive deposition of precursors is described in terms of thermodynamics and the Ostwald ripening model. The optimal conditions for the concentration and temperature for the spinning solution of methylammonium iodide to obtain various sizes of perovskite crystallites are presented. Examples are given for some other approaches that are used in the formation of high-quality perovskite films with high optoelectronic characteristics for a conversion rate of perovskite based solar cells on them.