# US 12,180,086 B2 · Method for improving conductivity and blue light filtering efficiency of transparent conducting oxide (TCO)

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- Number: US 12,180,086 B2
- Document ID: US12180086B2
- Status: Granted
- Kind: B2
- Application number: 18/468,600
- Filed: 2023-09-15
- Published: 2024-03-21
- Granted: 2024-12-31
- Earliest claimed: 2022-09-16
- Assignees: HPSTAR (Beijing)
- Applicants: HPSTAR (Beijing)
- Inventors: Wenge Yang; Xuqiang Liu; Gang Liu; Nana Li
- Web page: https://patentgrep.com/patent/US12180086B2

## CPC

- C01G 15/00: Compounds of gallium, indium or thallium
- G01N 21/59: Transmissivity (G01N21/25 takes precedence)
- G01N 27/041: {of a solid body}
- C01P 2002/54: one element only
- C01P 2002/84: by UV- or VIS- data
- C01P 2006/40: Electric properties
- C01P 2006/60: Optical properties, e.g. expressed in CIELAB-values
- H10D 64/60: Electrodes characterised by their materials
- H10F 77/244: {made of transparent conductive layers, e.g. transparent conductive oxide [TCO] layers}
- H10K 30/82: Transparent electrodes, e.g. indium tin oxide [ITO] electrodes
- H10K 50/805: Electrodes
- H10K 2102/101: {comprising transparent conductive oxides [TCO]}
- Y02E 10/549: Organic PV cells
- C01G: COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F (metal hydrides {monoborane, diborane or addition complexes thereof} C01B6/00; salts of oxyacids of halogens C01B11/00; peroxides, salts or peroxyacids C01B15/00; thiosulfates, dithionites, polythionates C01B17/64; compounds containing selenium, or tellurium C01B19/00; binary compounds of nitrogen with metals C01B21/06; azides C01B21/08; {compounds containing nitrogen, other non-metals and metal C01B21/082}; metal amides C01B21/092; nitrites C01B21/50; {compounds of noble gases C01B23/0005}; phosphides C01B25/08; salts of oxyacids of phosphorus C01B25/16; carbides C01B32/90; compounds containing silicon C01B33/00; compounds containing boron C01B35/00; compounds having molecular sieve properties but not having base-exchange properties C01B37/00; compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites, C01B39/00; cyanides C01C3/08; salts of cyanamide C01C3/16; thiocyanates C01C3/20)
- G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q)
- C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- H10D: INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10F: INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

The present disclosure provides a method for improving a conductivity and a blue light filtering efficiency of a transparent conducting oxide (TCO). The method includes the following steps: placing an indium oxide-based transparent conducting material (TCM) as a sample into a sample chamber of a high-pressure apparatus, and conducting a room-temperature high-pressure treatment, where the room-temperature high-pressure treatment refers to compressing the sample to a target pressure of 51 GPa from ambient pressure at room temperature and holding the target pressure for 5 min, and then conducting decompression to the ambient pressure. The conductivity is detected during the compression and the decompression, and the blue light filtering efficiency is detected separately before and after the room-temperature high-pressure treatment.

## Claims

### Claim 1

A method for improving a conductivity and a blue light filtering efficiency of a transparent conducting oxide (TCO), comprising the following steps:
placing an indium oxide-based transparent conducting material (TCM) as a sample into a sample chamber of a high-pressure apparatus, and conducting a room-temperature high-pressure treatment, wherein the room-temperature high-pressure treatment refers to compressing the sample to a target pressure of 51 GPa from ambient pressure at room temperature and holding the target pressure for 5 min, and then conducting decompression to the ambient pressure; the indium oxide-based TCM is selected from the group consisting of pure indium oxide and indium oxide doped with one of tin, titanium, molybdenum, tungsten, zirconium, and hydrogen; and the indium oxide-based TCM has a conductivity of greater than 10 S/m, and an average transmittance of over 75% in visible light at a wavelength of 460 nm to 800 nm.

### Claim 2 (depends on 1)

The method for improving a conductivity and a blue light filtering efficiency of a TCO according to claim 1, wherein the conductivity is detected during the compressing and the decompression, the blue light filtering efficiency is detected separately before and after the room-temperature high-pressure treatment, and the ambient pressure and the target pressure are calibrated separately by a ruby fluorescence peak.

### Claim 3 (depends on 1)

The method for improving a conductivity and a blue light filtering efficiency of a TCO according to claim 1, wherein when the conductivity is detected, an insulating substance is covered as an insulating layer at a short circuit position between the sample and the high-pressure apparatus.

### Claim 4 (depends on 1)

The method for improving a conductivity and a blue light filtering efficiency of a TCO according to claim 1, wherein the conductivity is detected by van der Pauw method and four-point probe configuration.

### Claim 5 (depends on 1)

The method for improving a conductivity and a blue light filtering efficiency of a TCO according to claim 1, wherein the blue light filtering efficiency is detected by an ultraviolet-visible absorption spectrophotometer through the following steps: testing a transmission spectrum at a wavelength of 400 nm to 800 nm in visible light, and then calculating the blue light filtering efficiency at a wavelength of 400 nm to 460 nm in blue light.

### Claim 6 (depends on 2)

The method for improving a conductivity and a blue light filtering efficiency of a TCO according to claim 2, wherein when the conductivity is detected, an insulating substance is covered as an insulating layer at a short circuit position between the sample and the high-pressure apparatus.

### Claim 7 (depends on 2)

The method for improving a conductivity and a blue light filtering efficiency of a TCO according to claim 2, wherein the conductivity is detected by van der Pauw method and four-point probe configuration.

### Claim 8 (depends on 2)

The method for improving a conductivity and a blue light filtering efficiency of a TCO according to claim 2, wherein the blue light filtering efficiency is detected by an ultraviolet-visible absorption spectrophotometer through the following steps: testing a transmission spectrum at a wavelength of 400 nm to 800 nm in visible light, and then calculating the blue light filtering efficiency at a wavelength of 400 nm to 460 nm in blue light.