The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 20, 2018
Filed:
Feb. 26, 2016
Cornell University, Ithaca, NY (US);
David T. Moore, Ithaca, NY (US);
Hiroaki Sai, Evanston, IL (US);
Kwan Wee Tan, Singapore, SG;
Lara A. Estroff, Dryden, NY (US);
Ulrich B. Wiesner, Ithaca, NY (US);
CORNELL UNIVERSITY, Ithaca, NY (US);
Abstract
A film comprising a crystalline halide perovskite composition having the following formula:AMX  (1)wherein: A is an organic cation selected from the group consisting of methylammonium, tetramethylammonium, formamidinium, and guanidinium; M is at least one divalent metal; and X is independently selected from halide atoms; wherein the crystalline film of the halide perovskite composition possesses at least one of an average grain size of at least 30 microns, substantial crystal orientation evidenced in an ordering parameter of at least 0.6, and a level of crystallinity of at least 90%. Methods for producing films of these halide perovskite compositions using ionic liquids instead of volatile organic solvents are also described herein.