ИСТИНА

Micromorphology and crystal structure of the perovskite-like dye compounds are key factors which influence on absorption and charge transport of the materials. Organic-inorganic compounds are especially apposite example of the materials with anisotropy. This motivates to analyze dye compounds of faced differently. All experiments were performed in double excess of methylammonium iodide to PbI2 in the liquor. That was demonstrated that the solvothermal growth of CH3NH3PbI3 in propanol-2 media leads to prismatic shape of crystallites contrary to cube-like obtained via recrystallization in air. Increasing temperature of the treatment the micron- and submicron-sized crystallites of the pure CH3NH3PbI3 phase of tetragonal lead-methylammonium iodide were obtained. An increase of pressure in the system up to 100 bar at 250°C produced the crystallites of tetragonal CH3NH3PbI3 of cage-like morphology with rather rough (100) planes.