Electrochemical device

• US 7,158,277 B2
• Filed: 03/07/2003
• Issued: 01/02/2007
• Est. Priority Date: 03/07/2002
• Status: Expired due to Term

• Current Assignee: Acreo AB
• Original Assignee: Acreo AB
• Inventors: Berggren, Magnus, Kugler, Thomas, Malmstrom, Anna, Remonen, Tommi, Hall, Jessica
• Primary Examiner(s): Spector; David N.
• Application Number:
  US10/505,573
• Publication Number:
  US 20050068603A1
• Time in Patent Office: 1,397 Days
• Field of Search: 359/267, 359/270, 359/271, 359/273, 359/274
• US Class Current: 359/274
• CPC Class Codes: C09K 9/02 Organic tenebrescent materials
• CPC Class Codes: G02F 1/15165 Polymers
• CPC Class Codes: G02F 1/155 Electrodes
• CPC Class Codes: G02F 2001/1557 Side by side arrangements of working and counter electrodes
• CPC Class Codes: G02F 2001/1635 the pixel comprises active switching elements, e.g. TFT
• CPC Class Codes: G02F 2001/164 the electrolyte is made of polymers
• CPC Class Codes: H05B 33/145 Arrangements of the electroluminescent material
• CPC Class Codes: H05B 33/28 of translucent electrodes

Abstract

An electrochromic device is provided comprising: (i) at least one material that is electrically conducting in at least one oxidation state and (ii) at least one electrochromic material, wherein said materials (i) and (ii) can be the same or different; at least one layer of a solidified electrolyte which is in direct electrical contact with said electrochromic element; and at least two electrodes comprising PEDOT-PSS, arranged side by side in a common plane and adapted for application of a voltage therebetween, one of said electrodes being in direct electrical contact with a component selected from said electrochromic element(s) and the other electrode(s) being in direct electrical contact with a component selected from said electrolyte layer(s) and said electrochromic element(s). Furthermore an electrochemically active element is provided comprising: a first layer comprising PEDOT-PSS mixed with an adhesion promoter; and a second layer comprising PANI, the second layer being deposited on top of and in direct electrical contact with the first layer.

Claims

1. An electrochromic device comprising:

at least one electrochromic element comprising (i) at least one material that is electrically conducting in at least one oxidation state and (ii) at least one electrochromic material, wherein said materials (i) and (ii) can be the same or different;

at least one layer of a solidified electrolyte which is in direct electrical contact with said electrochromic element; and

at least two electrodes comprising PEDOT-PSS, arranged side by side in a common plane and adapted for application of a voltage therebetween, one of said electrodes being in direct electrical contact with a component selected from said electrochromic element(s) and the other electrode(s) being in direct electrical contact with a component selected from said electrolyte layer(s) and said electrochromic element(s).

2. An electrochromic device according to claim 1, in which the electrodes and the electrochromic element(s) are arranged side by side in a common plane.

3. An electrochromic device according to claim 1, in which the electrochromic material is an electrochromic polymer.

4. An electrochromic device according to claim 1, in which the electrochromic element comprises a polyanion compound.

5. An electrochromic device according claim 4, in which said polyanion compound is a poly(styrene sulfonate) or a salt thereof.

6. An electrochromic device according to claim 1, in which the electrochromic element is formed from the same material as the electrodes.

7. An electrochromic device according to claim 1, in which the electrochromic element comprises polyaniline.

8. An electrochromic device according to claim 1, in which the electrodes are formed out of PEDOT-PSS.

9. An electrochromic device according to claim 1, in which the electrodes are formed out of a mixture comprising PEDOT-PSS and polystyrene.

10. An electrochromic device according to claim 7, in which said polyaniline is cast from a toluene solution.

11. An electrochromic device according to claim 1, in which the solidified electrolyte in the electrochromic device comprises a binder.

12. An electrochromic device according to claim 11, in which said binder is a gelling agent selected from the group consisting of gelatine, a gelatine derivative, polyacrylic acid, polymethacrylic acid, poly(vinylpyrrolidone), polysaccharides, polyacrylamides, polyurethanes, polypropylene oxides, polyethylene oxides, poly(styrene sulphonic acid) and poly(vinyl alcohol), and salts and copolymers thereof.

13. An electrochomic device according to claim 1, in which the solidified electrolyte in the electrochromic device comprises an ionic salt.

14. An electrochromic device according to claim 1, arranged on a support.

15. An electrochromic device according to claim 14, in which said support is selected from the group consisting of polyethylene terephthalate, polyethylene naphthalene dicarboxylate, polyethylene, polypropylene, polycarbonate, paper, coated paper, resin-coated paper, paper laminates, paperboard, corrugated board and glass.

16. An electrochromic device according to claim 14, in which said support is reflective.

17. An electrochromic device according to claim 2, in which the electrochromic material is an electrochromic polymer.

18. An electrochromic device according to claim 2, in which the electrochromic element comprises a polyanion compound.

19. An electrochromic device according to claim 3, in which the electrochromic element comprises a polyanion compound.

20. An electrochromic device according to claim 15, in which said support is reflective.