US 12,410,537 B2
Fabrication process for flexible single-crystal perovskite devices
Sheng Xu, La Jolla, CA (US); Yusheng Lei, La Jolla, CA (US); and Yimu Chen, La Jolla, CA (US)
Assigned to THE REGENTS OF THE UNIVERSITY OF CALIFORNIA, Oakland, CA (US)
Appl. No. 18/010,335
Filed by THE REGENTS OF THE UNIVERSITY OF CALIFORNIA, Oakland, CA (US)
PCT Filed Jun. 24, 2021, PCT No. PCT/US2021/038803
§ 371(c)(1), (2) Date Dec. 14, 2022,
PCT Pub. No. WO2021/262923, PCT Pub. Date Dec. 30, 2021.
Claims priority of provisional application 63/043,961, filed on Jun. 25, 2020.
Prior Publication US 2023/0250548 A1, Aug. 10, 2023
Int. Cl. C30B 7/06 (2006.01); C30B 7/00 (2006.01); C30B 29/12 (2006.01)
CPC C30B 7/06 (2013.01) [C30B 7/005 (2013.01); C30B 29/12 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method of fabricating an ionic crystal, comprising:
providing a single crystal substrate of an ionic crystal material;
applying a patterned mask over the single crystal substrate;
introducing a growth solution over the single crystal substrate, the growth solution including precursors for epitaxial growth of the ionic crystal material on the single crystal substrate such that epitaxial crystals grow over time through pattern openings in the patterned mask into a crystal structure with one or more morphologies;
removing from the growth solution the patterned mask and the crystal structure grown on the substrate as an assembled unit; and
detaching the single crystal substrate from the patterned mask and the crystal structure so that a subassembly of the patterned mask and the crystal structure remains;
applying an antisolvent to a surface of the second substrate or a surface of the crystal structure prior to transferring and
transferring the subassembly onto a second substrate.