METHOD OF PRODUCING A SEMICONDUCTOR FILM BASED ON ORGANO-INORGANIC COMPLEX HALOGENIDES WITH A PEROVSKITE-LIKE STRUCTURE Russian patent published in 2020 - IPC C23C26/02 C23C28/00 H01L31/18 

FIELD: materials science.

SUBSTANCE: invention relates to material science, namely to methods of producing a semiconductor film based on complex halogenides with a perovskite-like structure, which can be used as light-absorbing layer in solid-state, including thin-film, flexible or tandem solar cells, as well as for creation of optoelectronic, in particular, light-emitting devices. Method of producing a semiconductor film based on complex halogenides with a perovskite-like structure involves the following steps: a) forming a layer of a precursor of component B on a carrier substrate, b) depositing a layer of reagent on the surface of the layer of the precursor of component B, and c) treatment of carrier substrate with applied layers of reagent X₂ for a period of time which is necessary and sufficient for complete reaction conversion of the deposited reagent and precursor of component B. In step b), the reagent used is a reaction composition containing a mixture of AX and X₂ with molar ratio [X₂]/[AX] in range 0<[X₂]/[AX]<1. At step b) a film is obtained which contains nuclei of phase grains with a perovskite-like structure. Component B is a polyvalent metal cation selected from Pb, Sn, Bi and mixtures thereof. Reagent AX used is a salt formed by cation A⁺ and anion X^-, wherein cation A⁺ is a singly-charged organic or inorganic cation selected from methylammonium CH₃NH₃⁺, formamidinium (NH₂)₂CH⁺, guanidinium C(NH₂)₃⁺, NH₄⁺, Cs⁺, Rb⁺ cations, monosubstituted or disubstituted, or trisubstituted, or tetrasubstituted ammonium cations, and mixtures of said cations. Anion X^- is a singly-charged anion selected from Cl^-, Br^-, I^-, or pseudohalogenoid anion, or mixture thereof. Reagent X₂ molecular halogen is used.

EFFECT: providing a simpler and more efficient method of producing films of semiconductors based on complex halogenides with a perovskite-like structure, in particular for their use as light-absorbing layer in perovskite solar cells and increase in their efficiency as compared to analogues.

6 cl, 2 dwg, 1 tbl