Patent ID: 11952679
Assignee: THE REGENTS OF THE UNIVERSITY OF MICHIGAN
Field: Surface technology, coating (Chemistry)
Classification: CPC C  H  Y | IPC C  H

Claim 6:
7. An inverse temperature crystallization process for forming a single crystal perovskite, the process comprising:
introducing a precursor solution of a single crystal perovskite material having a composition represented by formula ABX3 into a crystallization chamber, wherein the precursor solution comprises a solvent and one or more compounds comprising atoms that form A, B, and X in the single crystal perovskite material, wherein A is at least one organic cation having a +1 or +2 charge, B is at least one inorganic cation having a +2 or +4 charge, and X is at least one anion having a −1 or −2 charge;
heating the precursor solution to a pre-nucleation temperature;
heating the precursor solution to a nucleation temperature that is at least about 2° C. above the pre-nucleation temperature to form a plurality of seed crystals; and
growing the single crystal perovskite material by lowering a temperature of the precursor solution to a crystal growth temperature below the nucleation temperature and introducing additional solvent or additional precursor solution into the crystallization chamber during the growing of the single crystal perovskite material, wherein the single crystal perovskite material has a volume of greater than or equal to about 1 mm3.