Patent ID: 11920042
Assignee: THE UNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  H  Y | IPC C  H

Claim 11:
12. A polycrystalline perovskite film comprising:
i. a composition of Formula (I)

ABX3  (I)

wherein A is a cation selected from the group consisting of methylammonium (MA), tetramethylammonium (TMA), formamidinium (FA), cesium (Cs), rubidium (Rb), potassium (K), sodium (Na), butylammonium (BAH), phenethylammonium (PEA), phenylammonium (PHA), guanidinium (GU), and a combination thereof,
B is at least one divalent metal; and
X is at least one halide; and

ii. a compound of Formula (II)

NH2—R1—NH2  (II)

wherein R1 is selected from the group consisting of linear or branched C3-C50 alkyl, C6-C12 aryl, C1-C20 alkyl-C6-C12 aryl-C1-C20 alkyl, C6-C12 aryl-C1-C10 alkyl-C6-C12 aryl, and graphene, wherein one or more carbon atoms in said C3-C50 alkyl or C1-C20 alkyl is optionally substituted with O, P, S, or NH;
wherein said C3-C50 alkyl, C6-C12 aryl, C1-C20 alkyl-C6-C12 aryl-C1-C20 alkyl, C6-C12 aryl-C1-C10 alkyl-C6-C12 aryl, or graphene is optionally substituted with one or more substituents, each independently selected from the group consisting of hydroxy, halo, haloalkoxy, alkoxy, haloalkyl, hydroxyalkyl, oxo, cyano, nitro, thiol, carboxyl, sulfonyl, sulfinyl, thiocyanate, —S(O)OH, —S(O)2OH, sulfonamido, —CH2OP(O)(OH)2, —OP(O)(OH)2, —R2R3P(O)4, and —NR4R5, wherein R2, R3, R4 and R5 are each independently hydrogen or C1-C6 alkyl;

wherein said compound of Formula II comprises between about 0.01 wt % and about 5 wt % of said film.