US 12,662,391 B2
Methods of growing large crystals of all-inorganic and hybrid organic-inorganic cesium lead bromide perovskites from solution
Mercouri G. Kanatzidis, Wilmette, IL (US); Yucheng Liu, Evanston, IL (US); and Lei Pan, Evanston, IL (US)
Assigned to Northwestern University, Evanston, IL (US)
Appl. No. 18/274,401
Filed by Northwestern University, Evanston, IL (US)
PCT Filed Mar. 24, 2022, PCT No. PCT/US2022/071298
§ 371(c)(1), (2) Date Jul. 26, 2023,
PCT Pub. No. WO2022/204701, PCT Pub. Date Sep. 29, 2022.
Claims priority of provisional application 63/166,480, filed on Mar. 26, 2021.
Prior Publication US 2024/0083765 A1, Mar. 14, 2024
Int. Cl. C30B 7/02 (2006.01); C01G 21/00 (2006.01)
CPC C01G 21/006 (2013.01) [C30B 7/02 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method for growing a perovskite single-crystal having the formula (FAxCs1-x)PbBr3, where 0≤x<1, the method comprising:
forming a crystallization solution comprising:
one or more (FAxCs1-x)PbBr3 perovskite precursors; and
one or more alkyl ammonium salts having the formula R(4-x)HxNX, where the Rs are alkyl groups selected from methyl groups, ethyl groups, propyl groups, butyl groups, and combinations thereof, x has a value of 0 or 1, and X is a halide anion, nitrate anion, acetate anion, perchlorate anion, or sulfate anion dissolved in an organic solvent;
maintaining or ramping up the temperature of the crystallization solution for a time sufficient for the solvent to evaporate and the perovskite precursors to react and form the perovskite single-crystal; and
optionally, transferring the perovskite single-crystal to a fresh batch of crystallization solution and maintaining or ramping up the temperature of the fresh crystallization solution for a time sufficient for the solvent to evaporate and the perovskite precursors to react and increase the size of the perovskite single-crystal;
wherein the perovskite single-crystal has at least one lateral dimension of 6 mm or greater and has a square shape or a rectangular shape with a rectangle aspect ratio of 3:1 or less.