Patent ID: 11953821
Assignee: CUBICPV INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  B  C  H  Y | IPC B  C  G  H

Claim 25:
26. A method comprising the steps of:
preparing a thin-film precursor ink, wherein preparing the thin-film precursor ink comprises the steps of:
contacting a lead halide and a Group 1 metal halide with a first solvent to form a thin-film precursor solution;
depositing the thin-film precursor ink onto a substrate; drying the thin-film precursor ink to form a thin film; annealing the thin film; and
rinsing the thin film with a salt solution comprising a second solvent and a salt selected from the group consisting of methylammonium halide, formamidinium halide, guanidinium halide, ethene tetramine halide, imidazolium halide, 1,2,2-triaminovinylammonium halide, and 5-aminovaleric acid hydrohalide,
wherein the lead halide comprises lead (II) iodide and the Group 1 metal halide comprises rubidium iodide.