LIQUID COMPOSITION OF VARIABLE CONTENT POLYHALIDES Russian patent published in 2018 - IPC C07C211/63 C07C257/12 C07C279/02 C01D3/04 C07F13/00 C01D3/10 C01D3/12 C09C1/00 

FIELD: chemistry.

SUBSTANCE: invention relates to a novel liquid reagent for preparing organo-inorganic perovskites, which can be used for light-absorbing materials in solar energy technology. Liquid initial reagent for preparing an organo-inorganic perovskite corresponds to composition AB-nB₂, where n=1–5, A is a cation selected from CH₃NH₃⁺, (NH₂)₂CH⁺, C(NH₂)₃⁺, or a mixture of cations CH₃NH₃⁺, (NH₂)₂CH⁺, C(NH₂)₃⁺, possibly in a mixture with Cs+ ions, B is an anion selected from Cl^-, Br^-, I^-, or a mixture thereof, B₂ is selected from Cl₂, Br₂ and I₂ or a mixture thereof. Invention also relates to a method for the preparation of the said liquid initial reagent. Method means mixing compound AB, or a mixture of AB compounds, optionally with cesium halide, where A is a cation selected from CH₃NH₃⁺, (NH₂)₂CH⁺, C(NH₂)₃⁺, B is an anion selected from Cl^-, Br^-, I^-, with component B₂, where B₂ is selected from Cl₂, Br₂ and I₂ or a mixture thereof, at the molar ratio of AB to B₂ from 1:1 to 1:5, within the temperature range from 10 to 120 °C.

EFFECT: use of the liquid composition of polyhalides leads to a simplification and acceleration of the technological process for the preparation of an organo-inorganic perovskite and perovskite-like compounds containing Pb, Sn, Bi, since it allows to carry out the process without the use of solvents.

2 cl, 3 ex