# US 2016/0240804 A1 · Coating material for forming semiconductors, semiconductor thin film, thin film solar cell and method for manufacturing thin film solar cell

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- Number: US 2016/0240804 A1
- Document ID: US20160240804A1
- Status: Published application
- Kind: A1
- Application number: 15/024,535
- Filed: 2014-11-04
- Published: 2016-08-18
- Earliest claimed: 2013-11-07
- Assignees: Sekisui Chemical Co., Ltd.
- Applicants: Sekisui Chemical Co., Ltd.
- Inventors: Akinobu HAYAKAWA; Shunji OHARA; Mayumi HORIKI; Kazushi ITO
- Web page: https://patentgrep.com/patent/US20160240804A1

## CPC

- H10P 14/3436: {being chalcogenide semiconductor materials not being oxides, e.g. ternary compounds}
- H10K 71/50: Forming devices by joining two substrates together, e.g. lamination techniques
- H10P 14/265: {using solutions}
- H10K 30/50: Photovoltaic [PV] devices
- H10K 85/113: {Heteroaromatic compounds comprising sulfur or selene, e.g. polythiophene}
- Y02E 10/549: Organic PV cells
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- H10P: GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

The present invention aims to provide a coating liquid for forming a semiconductor which facilitates large-area production of a semiconductor that is useful as a semiconductor material of a solar cell with high conversion efficiency and small variation in the conversion efficiency, and enables control of the film thickness. The present invention also aims to provide a semiconductor thin film produced from the coating liquid for forming a semiconductor, a thin film solar cell, and a method for producing the thin film solar cell. The present invention relates to a coating liquid for forming a semiconductor, including a complex that includes a group 15 metal element of the periodic table and sulfur and/or selenium, the coating liquid having a molar ratio of the group 15 metal element of the periodic table to the sulfur and/or selenium of 1:2 to 1:10.

## Claims

### Claim 1

A coating liquid for forming a semiconductor, comprising a complex that includes a group 15 metal element of the periodic table and sulfur and/or selenium,
the coating liquid having a molar ratio of the group 15 metal element of the periodic table to the sulfur and/or selenium of 1:2 to 1:10.

### Claim 2 (depends on 1)

The coating liquid for forming a semiconductor according to claim 1,
which is prepared from components including at least a metal-containing compound that contains a group 15 metal element of the periodic table, a sulfur-containing compound and/or a selenium-containing compound, and an organic solvent.

### Claim 3 (depends on 1)

The coating liquid for forming a semiconductor according to claim 1,
wherein the group 15 metal element of the periodic table is antimony.

### Claim 4 (depends on 1)

A semiconductor thin film produced by applying the coating liquid for forming a semiconductor according to claim 1, to a substrate.

### Claim 5 (depends on 1)

A thin film solar cell comprising a semiconductor prepared from the coating liquid for forming a semiconductor according to claim 1, as a photoelectric conversion layer.

### Claim 6 (depends on 1)

A thin film solar cell comprising a semiconductor prepared from the coating liquid for forming a semiconductor according to claim 1 as a photoelectric conversion layer,
wherein the photoelectric conversion layer further includes an organic semiconductor adjacent to the semiconductor prepared from the coating liquid for forming a semiconductor according to claim 1.

### Claim 7 (depends on 1)

A method for producing a thin film solar cell, comprising the steps of:
applying the coating liquid for forming a semiconductor according to claim 1, to a substrate to form a semiconductor thin film; and
laminating an organic semiconductor thin film on the semiconductor thin film.

### Claim 8 (depends on 1)

A method for producing a thin film solar cell, comprising the steps of:
laminating an organic semiconductor thin film on a substrate or another layer; and
applying the coating liquid for forming a semiconductor according to claim 1, to the organic semiconductor thin film to form a semiconductor thin film.

### Claim 9 (depends on 1)

A method for producing a thin film solar cell, comprising the step of
applying a mixed liquid of the coating liquid for forming a semiconductor according to claim 1, and an organic semiconductor to a substrate or another layer.