# US 12,180,241 B2 · Metal halide perovskites, light-emitting diodes, and methods

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- Number: US 12,180,241 B2
- Document ID: US12180241B2
- Status: Granted
- Kind: B2
- Application number: 17/380,904
- Filed: 2021-07-20
- Published: 2021-11-11
- Granted: 2024-12-31
- Earliest claimed: 2018-02-19
- Assignees: The Florida State University Research Foundation, Inc.
- Applicants: The Florida State University Research Foundation, Inc.
- Inventors: Biwu Ma; Yu Tian
- Web page: https://patentgrep.com/patent/US12180241B2

## CPC

- C07F 7/24: Lead compounds
- C07F 1/005: {without C-Metal linkages}
- C07F 7/003: {without C-Metal linkages}
- H10K 85/1135: {Polyethylene dioxythiophene [PEDOT]; Derivatives thereof}
- H10K 85/50: Organic perovskites; Hybrid organic-inorganic perovskites [HOIP], e.g. CH3NH3PbI3
- H10K 85/6572: {comprising only nitrogen in the heteroaromatic polycondensed ring system, e.g. phenanthroline or carbazole}
- H10K 50/115: comprising active inorganic nanostructures, e.g. luminescent quantum dots
- H10K 2102/103: {comprising indium oxides, e.g. ITO}
- C07F: ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM (metal-containing porphyrins C07D487/22)
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

Metal halide perovskite crystals, composite materials that include metal halide perovskite crystals and a polymeric matrix material, devices that include metal halide perovskite crystals, and methods of forming metal halide perovskite crystals, composite materials, and devices. The devices may include optoelectronic devices, such as light-emitting diodes. The light-emitting diodes may emit red light.

## Claims

### Claim 1

A metal halide perovskite crystal comprising:
a unit cell according to formula (I)—
(RNH3)2(IC)n−1MnX3n+1 (I);
wherein IC is an inorganic cation comprising a monovalent metal;
R is a monovalent C7-C8 arylalkyl;
M is a metal selected from the group consisting of Pb, Sn, Cu, Ge, Mn, Co, Bi, and Eu;
X is a halide selected from the group consisting of Cl, Br, and I; and
n is an integer equal to or greater than 1.

### Claim 2 (depends on 1)

The metal halide perovskite crystal of claim 1, wherein the monovalent C7-C8 arylalkyl is unsubstituted.

### Claim 3 (depends on 1)

The metal halide perovskite crystal of claim 1, wherein R is benzyl.

### Claim 4 (depends on 1)

The metal halide perovskite crystal of claim 1, wherein the metal halide perovskite crystal has a quasi-2D structure.

### Claim 5 (depends on 4)

The metal halide perovskite crystal of claim 4, wherein n is 2 to 9.

### Claim 6 (depends on 1)

The metal halide perovskite crystal of claim 1, wherein the monovalent metal comprises an alkali metal.

### Claim 7 (depends on 6)

The metal halide perovskite crystal of claim 6, wherein the alkali metal is Cs.

### Claim 8 (depends on 1)

The metal halide perovskite crystal of claim 1, wherein M is Pb.

### Claim 9 (depends on 1)

The metal halide perovskite crystal of claim 1, wherein X is I.