# US 12,120,895 B2 · Solar cell

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- Number: US 12,120,895 B2
- Document ID: US12120895B2
- Status: Granted
- Kind: B2
- Application number: 18/059,917
- Filed: 2022-11-29
- Published: 2023-03-23
- Granted: 2024-10-15
- Earliest claimed: 2020-06-24
- Assignees: Panasonic Holdings Corporation
- Applicants: Panasonic Holdings Corporation
- Inventors: Taisuke Matsui; Takeyuki Sekimoto; Takashi Nishihara; Teruaki Yamamoto; Ryusuke Uchida
- Web page: https://patentgrep.com/patent/US12120895B2

## CPC

- H10K 30/86: Layers having high hole mobility, e.g. hole-transporting layers or electron-blocking layers
- H01G 9/2009: {Solid electrolytes}
- H10K 30/40: comprising a p-i-n structure, e.g. having a perovskite absorber between p-type and n-type charge transport layers
- H10K 85/50: Organic perovskites; Hybrid organic-inorganic perovskites [HOIP], e.g. CH3NH3PbI3
- H10K 85/30: Coordination compounds
- H10K 85/631: {Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine}
- H10K 85/658: {Organoboranes}
- 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

The solar cell of the present disclosure includes a first electrode, a photoelectric conversion layer, an intermediate layer, a hole transport layer, and a second electrode in this order, wherein the hole transport layer includes a hole transport material and an oxidant, the photoelectric conversion layer includes a perovskite compound containing iodine, and the intermediate layer includes at least one selected from the group consisting of bromide, chloride, and fluoride.

## Claims

### Claim 1

A solar cell comprising a first electrode, a photoelectric conversion layer, an intermediate layer, a hole transport layer, and a second electrode in this order, wherein,
the hole transport layer includes a hole transport material and an oxidant,
the photoelectric conversion layer includes a perovskite compound containing iodine, and
the intermediate layer includes at least one selected from the group consisting of bromide, chloride, and fluoride.

### Claim 2 (depends on 1)

The solar cell according to claim 1, wherein
the hole transport material includes a triphenylamine derivative.

### Claim 3 (depends on 2)

The solar cell according to claim 2, wherein
the triphenylamine derivative is poly[bis(4-phenyl) (2,4,6-trimethylphenyl)amine] or a poly[bis(4-phenyl) (2,4,6-trimethylphenyl)amine] derivative.

### Claim 4 (depends on 1)

The solar cell according to claim 1, wherein
the oxidant is a fluoroboron-based compound.

### Claim 5 (depends on 4)

The solar cell according to claim 4, wherein
the fluoroboron-based compound is tris(pentafluorophenyl) boran or a tris(pentafluorophenyl) boran derivative.

### Claim 6 (depends on 1)

The solar cell according to claim 1, wherein
the intermediate layer includes bromide.

### Claim 7 (depends on 6)

The solar cell according to claim 6, wherein
the bromide is alkylammonium bromide.

### Claim 8 (depends on 7)

The solar cell according to claim 7, wherein
the alkylammonium bromide has four or more carbon atoms.

### Claim 9 (depends on 7)

The solar cell according to claim 7, wherein
the hole transport material is poly[bis(4-phenyl) (2,4,6-trimethylphenyl)amine] or a poly[bis(4-phenyl) (2,4,6-trimethylphenyl)amine] derivative, and
the oxidant is tris(pentafluorophenyl) boran or a tris(pentafluorophenyl) boran derivative.

### Claim 10

A solar cell comprising a first electrode, a photoelectric conversion layer, an intermediate layer, a hole transport layer, and a second electrode in this order, wherein,
the hole transport layer includes a hole transport material and an oxidant,
the photoelectric conversion layer includes a perovskite compound containing iodine, and
an absolute value of a redox potential for neutralization of the cationized hole transport material is larger than an absolute value of a redox potential for neutralization of anions generated when the intermediate layer is ionized.