Method of forming metal ion doped halide perovskite megalibrarie
AssigneeNorthwestern University
InventorsChad A. Mirkin, Donghoon Shin, Tong Cai
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Abstract
A method of forming metal ion doped halide perovskite nanocrystals includes forming metal halide perovskite nanocrystals, exposing the nanocrystals to a solvent vapor assisted recrystallization, and diffusing a metal ion dopant into the nanocrystals in a thermal annealing assisted cation exchange process.
Claims20
A method of forming a metal ion doped mixed-ion perovskite nanocrystal array having a plurality of metal ion doped halide perovskite nanocrystals arranged in a pattern, each halide perovskite being of the formula ABX3, wherein A comprises one or more cations, B comprises one or more metal cations, X comprises one or more halogens, the method comprising:
- contacting a substrate with a coated pen array coated with a first ink to thereby deposit the first ink as a pattern of printed indicia on the substrate, wherein the first ink comprises at least one first perovskite precursor having the formula AX1, at least one second perovskite precursor having the formula BX22, and at least one third perovskite precursor having the formula B′X12 and/or B′X22 dissolved in a solvent, wherein B′ comprises one or more dopant metal cation, and X1 and X2 are each a halogen, and the printed indicia form nanoreactors on the substrate and a halide perovskite nanocrystal nucleates and grows within each nanoreactor to form the halide perovskite nanocrystal array;
- exposing the halide perovskite nanocrystals to a crystallization solvent vapor for recrystallization of the halide perovskite;
- and
- thermally annealing the halide perovskite nanocrystals to promote a cation exchange process whereby B′ diffuses into the halide perovskite nanocrystals and exchanges with a portion of B to thereby form the doped perovskite nanocrystals,
- wherein B′ and B are different metal cations or metal cations of the same metal having different valency, and
- wherein X1 and X2 are the same halogen when X comprises one halogen and X1 and X2 are different halogens when X comprises more than one halogen.
A metal ion doped perovskite with tunable photoluminescence having a formula PEA2Pb1-aB′aXyX′4-y, wherein X and X′ are each a halogen, B′ is the metal ion, and the metal ion is one or more of Mn2+, Cd2+, Cu2+, Yb3+, Er3+, Sb3+, Bi3+.
A metal ion doped perovskite having a formula PEA2Pb0.75Mn0.25(Br0.3I0.7)4, wherein the metal ion doped perovskite emits white light with a CIE chromaticity coordinate of about (0.33, 0.33).
A method of forming a metal ion doped layered perovskite nanocrystal array having a plurality of metal ion doped halide perovskite nanocrystals arranged in a pattern, each halide perovskite being of the formula A′2An-1BnX2n+1, wherein n is at least 1, A′ comprises one or more organic compounds, A, when present, comprises one or more cations, and X comprises one or more halogens, the method comprising:
- contacting a substrate with a coated pen array coated with a first ink to thereby deposit the first ink as a pattern of printed indicia on the substrate, wherein the first ink comprises at least one first perovskite precursor having the formula A′X1, at least one second first perovskite precursor having the formula AX1 when n is greater than 1, at least one second perovskite precursor having the formula BX22, and at least one third perovskite precursor having the formula B′X12 and/or B′X22 dissolved in a solvent, and the printed indicia form nanoreactors on the substrate and a halide perovskite nanocrystal nucleates and grows within each nanoreactor to form the halide perovskite nanocrystal array;
- exposing the halide perovskite nanocrystals to a crystallization solvent vapor for recrystallization of the halide perovskite;
- and
- thermally annealing the halide perovskite nanocrystals to promote a cation exchange process whereby B′ diffuses into the halide perovskite nanocrystals and exchanges with a portion of B to thereby form the doped perovskite nanocrystals,
- wherein B′ and B are different metal cations or metal cations of the same metal having different valency, and
- wherein X1 and X2 are the same halogen when X comprises one halogen and X1 and X2 are different halogens when X comprises more than one halogen.
Dependencies are inferred from the claim text.