Infrared-absorbing composition, film, optical filter, solid-state imaging element, image display device, and infrared sensor

Patent metadata

Field	Value
Publication number	US-12528947-B2
Application number	US-202218065080-A
Country	US
Kind code	B2
Filing date	Dec 13, 2022
Priority date	Jun 15, 2020
Publication date	Jan 20, 2026
Grant date	Jan 20, 2026

Abstract

An infrared-absorbing composition includes particles of an infrared-absorbing coloring agent and a solvent, in which the particles in the infrared-absorbing composition have two or more maximal absorption wavelengths exhibited in a wavelength range of 650 to 1500 nm, and in the range, in a case where an absorbance at a maximal absorption wavelength existing on a second shortest wavelength side is set to 1, an absorbance at a maximal absorption wavelength existing on a shortest wavelength side is 0.6 to 2.0.

First claim

What is claimed is:

1 . An infrared-absorbing composition comprising:
particles of an infrared-absorbing coloring agent; and a solvent, wherein the particles in the infrared-absorbing composition have two or more maximal absorption wavelengths exhibited in a wavelength range of 650 to 1500 nm, and in the range, in a case where an absorbance at a maximal absorption wavelength existing on a second shortest wavelength side is set to 1, an absorbance at a maximal absorption wavelength existing on a shortest wavelength side is 0.6 to 2.0, wherein the infrared-absorbing coloring agent comprises a compound represented by Formula (PP-2):

wherein, in Formula (PP-2), R 1a represents an alkyl group; R 1b represents a substituent; R 3 , R 4 , R 5 , and R 6 each independently represent a cyano group or a heteroaryl group; R 7 and R 8 each indecently represent —BR 9 R 10 wherein R 9 and R 10 each independently represent an aryl group; L 1 represents an aliphatic hydrocarbon group, —O—, or an (n2+1)-valent linking group consisting of a combination of these groups; X 1 represents an acid group or a basic group; n1 represents 0; n2 represents 1; and m1 represents 1.

2 . The infrared-absorbing composition according to claim 1 ,
wherein, in the range, a difference between the maximal absorption wavelength existing on the shortest wavelength side and the maximal absorption wavelength existing on the second shortest wavelength side is 30 to 80 nm.

3 . The infrared-absorbing composition according to claim 1 ,
wherein the maximal absorption wavelength of the particles, which exists on the shortest wavelength side, exists on a shorter wavelength side than a wavelength at which a coloring agent solution that the infrared-absorbing coloring agent constituting the particles is dissolved in a good solvent for the infrared-absorbing coloring agent exhibits a highest absorbance.

4 . The infrared-absorbing composition according to claim 1 ,
wherein the particles in the infrared-absorbing composition have three or more maximal absorption wavelengths exhibited in the wavelength range of 650 to 1500 nm.

5 . The infrared-absorbing composition according to claim 1 ,
wherein the number of maximal absorption wavelengths exhibited by the particles in the infrared-absorbing composition in the wavelength range of 650 to 1500 nm is greater than the number of maximal absorption wavelengths exhibited by a coloring agent solution that the infrared-absorbing coloring agent constituting the particles is dissolved in a good solvent for the infrared-absorbing coloring agent in the wavelength range of 650 to 1500 nm.

6 . The infrared-absorbing composition according to claim 1 , further comprising:
a curable compound.

7 . The infrared-absorbing composition according to claim 1 ,
wherein the infrared-absorbing composition is for an optical filter or an ink.

8 . A film formed of the infrared-absorbing composition according to claim 1 .

9 . An optical filter comprising:
the film according to claim 8 .

10 . A solid-state imaging element comprising:
the film according to claim 8 .

11 . An image display device comprising:
the film according to claim 8 .

12 . An infrared sensor comprising:
the film according to claim 8 .

Assignees

• Fujifilm Corp

Inventors

• Matsumura Tokihiko
• SAMEJIMA Suguru
• Kato Yumi
• Orita Ryoji

Classifications

• H10F39/805 Primary

  Coatings · CPC title

• G02B5/208

  for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation · CPC title

• C09D11/106

  containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds · CPC title

• C09D11/037

  characterised by the pigment · CPC title

• C09B67/0063

  of organic pigments with only macromolecular substances · CPC title