Patent ID: 11943993
Assignee: OXFORD UNIVERSITY INNOVATION LIMITED
Field: nan (nan)
Classification: CPC H  Y | IPC H

Claim 0:
1. A process for producing a layer of a crystalline A/M/X material, which crystalline A/M/X material comprises a compound of formula [A]a[M]b [X]c, wherein: [M] comprises one or more first cations, which one or more first cations are metal or metalloid cations; [A] comprises one or more second cations; [X] comprises one or more halide anions; a is an integer from 1 to 6; b is an integer from 1 to 6; and c is an integer from 1 to 18,
wherein the process comprises disposing on a substrate a precursor composition comprising:
(a) a first precursor compound comprising a first cation (M), which first cation is a metal or metalloid cation; and
(b) a solvent,

and wherein the solvent comprises:
(i) a non-polar organic solvent which is a hydrocarbon solvent, a chlorohydrocarbon solvent or an ether solvent; and
(ii) a first organic amine comprising at least three carbon atoms, wherein the solvent comprises the non-polar organic solvent and the first organic amine in a volume ratio (non-polar organic solvent):(first organic amine) of from 40:1 to 1:2.