# US 10,770,239 B1 · High-efficiency and durable optoelectronic devices using layered 2D perovskites

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- Number: US 10,770,239 B1
- Document ID: US10770239B1
- Status: Granted
- Kind: B1
- Application number: 15/641,142
- Filed: 2017-07-03
- Granted: 2020-09-08
- Earliest claimed: 2016-07-01
- Assignees: Triad National Security, LLC
- Applicants: Triad National Security, LLC
- Inventors: Aditya Mohite; Hsinhan Tsai; Wanyi Nie; Mercouri Kanatzidis; Konstantinos Stoumpos
- Web page: https://patentgrep.com/patent/US10770239B1

## CPC

- H10K 71/12: using liquid deposition, e.g. spin coating
- H01G 9/2059: {comprising an organic dye as the active light absorbing material, e.g. adsorbed on an electrode or dissolved in solution}
- H10K 85/1135: {Polyethylene dioxythiophene [PEDOT]; Derivatives thereof}
- H10K 85/141: {comprising aliphatic or olefinic chains, e.g. poly N-vinylcarbazol, PVC or PTFE}
- H10K 85/215: {comprising substituents, e.g. PCBM}
- H10K 85/50: Organic perovskites; Hybrid organic-inorganic perovskites [HOIP], e.g. CH3NH3PbI3
- H10K 85/60: Organic compounds having low molecular weight (H10K85/10 - H10K85/50 take precedence)
- H10K 30/50: Photovoltaic [PV] devices
- H10K 30/88: Passivation; Containers; Encapsulations
- H10K 71/40: Thermal treatment, e.g. annealing in the presence of a solvent vapour
- H10K 2102/102: {comprising tin oxides, e.g. fluorine-doped SnO2}
- Y02E 10/542: Dye sensitized solar cells
- Y02E 10/549: Organic PV cells
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES
- H01G: CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE (selection of specified materials as dielectric H01B3/00; capacitors having potential barriers H10D1/62, H10K10/10)
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A thin film for an optoelectronic device includes a layered 2D perovskite material. The thin film including the layered 2D perovskite material forms a substantially or nearly single-crystalline highly uniform thin film with strongly preferential out-of-plane alignment of the inorganic perovskite layers. This single-crystalline, highly uniform, and highly aligned thin film of the layered 2D perovskite material may thereby facilitate efficient charge transport in an optoelectronic device.

## Claims

### Claim 1

A thin film for an optoelectronic device, the thin film comprising a layered 2D perovskite material comprising two or more inorganic perovskite layers, the thin film comprising the layered 2D perovskite material comprising a substantially single-crystalline uniform thin film,
the layered 2D perovskite material being represented by (BA)2(MA)n−1PbnI3n+1, wherein BA is an n-butyl ammonium cation and MA is a methyl ammonium cation.

### Claim 2 (depends on 1)

The thin film of claim 1, wherein n is 3 or 4.

### Claim 3 (depends on 1)

The thin film of claim 1, wherein the thin film has a thickness of 100 nm to 900 nm.

### Claim 4

An optoelectronic device comprising:
a substrate layer,
a thin film including a layered 2D perovskite on the substrate layer, the layered 2D perovskite comprising two or more inorganic perovskite layers, and the thin film comprising a substantially single-crystalline uniform thin film, the layered 2D perovskite being represented by (BA)2(MA)n−1PbnI3n+1, wherein BA is an n-butyl ammonium cation and MA is a methyl ammonium cation, and
a second electrode on the thin film.

### Claim 5 (depends on 4)

The optoelectronic device of claim 4, further comprising an electron transport layer.

### Claim 6 (depends on 4)

The optoelectronic device of claim 4, further comprising an encapsulation layer.

### Claim 7 (depends on 4)

The optoelectronic device of claim 4, wherein the optoelectronic device is a photovoltaic device, a solar cell, a LED, a LASER, an electrically injected LASER, a photo or charge particle detector, or a field effect transistor.