Electro-optic elements and method of forming

Patent metadata

Field	Value
Publication number	US-11624962-B2
Application number	US-202017036260-A
Country	US
Kind code	B2
Filing date	Sep 29, 2020
Priority date	Oct 2, 2019
Publication date	Apr 11, 2023
Grant date	Apr 11, 2023

Abstract

An electro-optic element includes a first electroactive compartment including an electroactive film having a first electroactive component and a second electroactive compartment including an electroactive solution or gel having a second electroactive component. An ion selective material is disposed between the first and second electroactive compartments and is configured to inhibit diffusion of the second electroactive component in an activated state from the second electroactive compartment to the first electroactive compartment. At least one of the first and second electroactive components is electrochromic such that the electro-optic element is configured to reversibly attenuate transmittance of light having a wavelength within a predetermined wavelength range when an electrical potential is applied to the electro-optic element.

First claim

What is claimed is:

1. An electro-optic element, comprising:
a first electroactive compartment comprising an electroactive film including a first electroactive component, wherein the first electroactive compartment is disposed adjacent a first electrically conductive layer;
a second electroactive compartment disposed adjacent a second electrically conductive layer and comprising an electroactive solution or gel including a second electroactive component, and wherein the second electroactive component is changeable from an inactivated state to an activated state upon application of a predetermined electrical potential across the first and second electrically conductive layers; and
an ion selective material disposed between the first and second electroactive compartments, wherein the ion selective material is (i) configured to inhibit diffusion of the second electroactive component in the activated state from the second electroactive compartment to the first electroactive compartment and (ii) and an anionic ionic exchange membrane, and
wherein at least one of the first electroactive component and second electroactive component is electrochromic such that the electro-optic element is configured to reversibly attenuate transmittance of light having a wavelength within a predetermined wavelength range when an electrical potential is applied across the first and second electrically conductive layers, and
wherein the first electroactive component or the second electroactive component comprises 5,10-bis(hydroxyalkyl) 5,10-dihydrophenazine.

2. The electro-optic element of claim 1 , wherein the first electroactive component or the second electroactive component comprises at least one cathodic component selected from a viologen, viologen derivative, methyl viologen, octyl viologen, benzyl viologen, di-acrylate viologen, di-vinyl viologen, di-vinyl ether viologen, di-epoxy viologen, di-oxetane viologen, di-hydroxy viologen, 1,1′-dialkyl-2,2′-bipyridinium, ferrocenium, substituted ferrocenium, diimide, N,N′-dialkyl pyrometallic diimide, N,N′-dimethyl-1,4,5,8-naphthalene diimide, and combinations thereof.

3. The electro-optic element of claim 1 , wherein the ion selective material comprises at least one polymer selected from derivatized polysulfones, derivatized poly(ether sulfones), derivatized poly(ether ketones), derivatized benzimidazoles, derivatized poly(phenylene oxides), derivatized polypropylenes, derivatized polyethylene, derivatized polyacrylates, derivatized polymethacrylates, derivatized polyamides, derivatized polystyrenes, derivatized polyethers, derivatized poly(ethylene oxide), derivatized poly(arylene ethers), derivatized poly(tetrahydrofuran), sulfonated tetrafluoroethylene polymers, ammoniated polystyrene copolymers, poly(vinyl pyridinium) co-polymers, poly(vinyl imidazolium) co-polymers, and combinations thereof.

4. The electro-optic element of claim 1 , wherein at least one of the first electrically conductive layer and the second electrically conductive layer comprises a material selected from fluorine doped tin oxide (FTO), indium tin oxide (ITO), doped zinc oxide, indium zinc oxide, metal oxide/Ag/metal oxide, silver nano-wire coatings, carbon nanotube coatings, graphene coatings, wire grids, conductive polymers, poly(3,4-ethylenedioxythiophene) (PEDOT), rhodium, chromium, nickel, silver, gold, and combinations thereof.

5. The electro-optic element of claim 1 , wherein the first electroactive component is at least one of incorporated into a backbone of a polymeric matrix and covalently bonded to a polymer chain forming a polymeric matrix as a pendant group.

6. The electro-optic element of claim 1 , wherein the electroactive film comprises at least one material selected from a polyaniline, polythiophene, polymeric metallocene, nickel oxide, vanadium oxide, tungsten oxide, and iridium oxide.

7. The electro-optic element of claim 1 , wherein:
the first electroactive component comprises an anodic component; and
the second electroactive component comprises a cathodic component.

8. The electro-optic element of claim 1 , wherein:
the first electroactive component comprises a cathodic component; and
the second electroactive component comprises an anodic component.

9. The electro-optic element of claim 1 , wherein the electroactive film is bi-stable.

10. The electro-optic element of claim 1 , wherein the ion selective material is disposed over the electroactive film such that the ion selective material acts as a separator between the electroactive film and the second electroactive component.

11. The electro-optic element of claim 1 , further comprising:
a first substrate, wherein a surface of the first substrate includes the first electrically conductive layer; and
a second substrate, wherein a surface of the second substrate includes the second electrically conductive layer.

12. The electro-optic element of claim 11 , wherein a thickness of the first substrate differs from a thickness of the second substrate.

13. The electro-optic element of claim 11 , wherein the first substrate is constructed from a different material than the second substrate.

14. The electro-optic element of claim 11 , further comprising:
a primary seal that traverses an approximate perimeter of first and second substrates to define a chamber.

15. The electro-optic element of claim 11 , further comprising:
at least one of glass and polymeric beads between the first and second substrates to facilitate maintaining a predetermined spacing between the first substrate and the second substrate.

16. The electro-optic element of claim 11 , wherein the first substrate is at least partially optically transparent and the second substrate is not fully transparent.

17. The electro-optic element of claim 1 , wherein the anionic ion exchange membrane comprises a derivatized polypropylene.

18. The electro-optic element of claim 1 , wherein the anion ion exchange membrane allows diffusion of at least one of the following anions: BF 4 − , PF 6 − , SbF 6 − , AsF 6 − , ClO 4 − , SO 3 CF 3 − , N(CF 3 SO 2 ) 2 − , C(CF 3 SO 2 ) 3 − , N(SO 2 C 2 F 5 ) − , Al(OC(CF 3 ) 3 ) 4 − , or BAr 4 − , wherein Ar is an aryl or fluorinated aryl group.

Assignees

• Gentex Corp

Inventors

• Kloeppner Leroy J

Classifications

• G02F2201/44

  Arrangements combining different electro-active layers, e.g. electrochromic, liquid crystal or electroluminescent layers · CPC title

• G02F1/1525

  characterised by a particular ion transporting layer, e.g. electrolyte · CPC title

• G02F1/15165

  Polymers · CPC title

• G02F1/1533 Primary

  structural features not otherwise provided for · CPC title

• G02F1/1503 Primary

  caused by oxidation-reduction reactions in organic liquid solutions, e.g. viologen solutions · CPC title