ELECTROCHROMIC COMPOSITION AND ELECTROCHROMIC ELEMENT

• US 20170114274A1
• Filed: 06/30/2015
• Published: 04/27/2017
• Est. Priority Date: 07/11/2014
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Yamada, Kenji, Okada, Shinjiro, Yamamoto, Jun
• Granted Patent: US 9,969,931 B2
• Time in Patent Office: Days
• CPC Class Codes: C07D 333/16 by oxygen atoms
• CPC Class Codes: C09K 2211/1044 containing two nitrogen atoms as heteroatoms
• CPC Class Codes: C09K 2211/1092 containing sulfur as the only heteroatom
• CPC Class Codes: C09K 9/02 Organic tenebrescent materials
• CPC Class Codes: G02F 1/1503 caused by oxidation-reduction reactions in organic liquid solutions, e.g. viologen solutions
• CPC Class Codes: G02F 1/1516 comprising organic material
• CPC Class Codes: G02F 1/15165 Polymers
• CPC Class Codes: G02F 1/153 Constructional details
• CPC Class Codes: G02F 1/155 Electrodes
• CPC Class Codes: G02F 1/157 Structural association of cells with optical devices, e.g. reflectors or illuminating devices
• CPC Class Codes: G02F 2001/15145 the electrochromic layer comprises a mixture of anodic and cathodic compounds
• CPC Class Codes: H04N 23/54 Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils

Abstract

An electrochromic composition has an anodic electrochromic compound and a cathodic electrochromic compound, in which the anodic electrochromic compound is represented by General Formula [1]

and the cathodic electrochromic compound is represented by General Formula [2]

In General Formula 1, A₁ to A₄ represent substituents, R₁ and R₂, and R₂₀ and R₂₁ represent a hydrogen atom or a substituent. n is an integer of 1 to 5. X represents a thiophene derivative and Y- represents an anion.

Claims

1. An electrochromic composition comprising:

an anodic electrochromic compound; and

a cathodic electrochromic compound,

wherein the anodic electrochromic compound is represented by General Formula [1] and the cathodic electrochromic compound is represented by General Formula [2],

2. The electrochromic composition according to claim 1, wherein at least either one of A₁ or A₂ is an alkoxy group in which the number of carbon atoms is 1 or more and 20 or less.

3. The electrochromic composition according to claim 1, wherein at least either one of A₃ or A₄ is an alkoxy group in which the number of carbon atoms is 1 or more and 20 or less.

4. The electrochromic composition according to claim 1, wherein the alkoxy group represented by at least either one of A₁ or A₂ is a methoxy group or an isopropoxy group, and the alkoxy group represented by at least either one of A₃ or A₄ is a methoxy group or an isopropoxy group.

5. The electrochromic composition according to claim 1, wherein R₂₀ and R₂₁ above are electron withdrawing substituents.

6. The electrochromic composition according to claim 5, wherein R₂₀ and R₂₁ above each are any one of a tert-butyl group, a trifluoromethyl group, a methoxy group, a benzyloxy group, a methyl ester group, or a cyano group.

7. The electrochromic composition according to claim 1, wherein a weight ratio of the electrochromic compound represented by General Formula [1] is 10% by mol or more and 90% by mol or less when a total of the electrochromic compound represented by General Formula [1] and the electrochromic compound represented by General Formula [2] is 100% by mol.

8. The electrochromic composition according to claim 1 comprising a third electrochromic compound which is different from the electrochromic compound represented by General Formula [1] and the electrochromic compound represented by General Formula [2].

9. The electrochromic composition according to claim 1 further comprising a solvent and an electrolyte.

10. The electrochromic composition according to claim 9, wherein a concentration of the electrolyte is larger than 0 mol/l and 10 mol/l or less based on the solvent.

11. An electrochromic element comprising:

a pair of electrodes; and

an electrochromic layer disposed between the pair of electrodes, wherein the electrochromic layer has the electrochromic composition according to claim 1.

12. An optical filter comprising:

the electrochromic element according to claim 11; and

an active element connected to the electrochromic element.

13. A lens unit comprising:

the optical filter according to claim 12; and

an imaging optical system having a plurality of lenses.

14. An imaging device comprising:

the optical filter according to claim 12;

an imaging optical system; and

an image pickup device which performs imaging through the optical filter.

15. An imaging device, which is an imaging device to which an imaging optical system can be attached, the imaging device comprising:

the optical filter according to claim 12; and

an image pickup device which receives light passing through the optical filter.

16. A window material comprising:

a pair of transparent substrates; and

the electrochromic element according to claim 11.