METHOD OF MAKING INORGANIC PEROVSKITE NANOWHISKERS OF CsPbBr₃ TYPE

摘要

FIELD: nanotechnologies.;SUBSTANCE: invention relates to synthesis of nanostructures based on perovskites, which can be used as materials for nanophotonics to create Fabry-Perot nanosensors and photonic integrated circuits. Method for making insulated perovskite nanowhiskers CsPbBr₃ includes treatment of a glass substrate by polishing its surface with a mixture of chromium oxide Cr₂O₃ particles with diameter less than 100 nm, glyceryl tristearate and oleic acid to create hydrophobic layer, followed by applying a solution of precursors of perovskite CsBr and PbBr₂ to the substrate by spraying or spin-coating with formation of solution droplets, then substrate with said application is placed on bottom of vessel, placed in another vessel of larger size, which contains azeotrope: isopropyl alcohol-water (IPA⋅H₂O) and is at constant temperature of 50 °C, closing it with a cover and for final formation of nanowhiskers drying is carried out for 5–7 minutes until complete drying of solution drops.;EFFECT: faster operation (production time reduced to 5–7 minutes), simplification and cheapening of manufacturing technology of high-quality inorganic perovskite nanowhiskers of CsPbBr₃ type with a longitudinal dimension of 2–50 mcm and a cross section of less than 1 mcm, characterized by low concentration of defect conditions, improved reflectivity of side surfaces and improved optical properties: high Q-factor Q=1,017–6,166 and low generation threshold P_thres=13 nJ/cm².;1 cl, 6 dwg, 1 ex