Dispersed iridium based complementary electrochromic device

• US 4,652,090 A
• Filed: 04/12/1985
• Issued: 03/24/1987
• Est. Priority Date: 04/20/1984
• Status: Expired due to Term

• Current Assignee: Nikon Corporation
• Original Assignee: Nippon Kogaku K. K. (Nikon Corporation)
• Inventors: Niwa, Tatsuo, Uchikawa, Kiyoshi
• Primary Examiner(s): Punter, William H.
• Application Number:
  US06/722,390
• Time in Patent Office: 711 Days
• Field of Search: 350/357
• US Class Current: 359/267
• CPC Class Codes: G02F 1/15245 based on iridium oxide or hydroxide
• CPC Class Codes: G02F 1/1525 characterised by a particular ion transporting layer, e.g. electrolyte

Abstract

An electrochromic device including one electrode layer (A), a cathodically coloring electrochromic layer (B), an ionic conductive layer (C) if required, a reversibly oxidizable layer (D) and another electrode layer (E), at least one of the one electrode layer (A) and the other electrode layer (E) being transparent, and at least one of the cathodically coloring electrochromic layer (B), the ionic conductive layer (C) and the reversibly oxidizable layer (D) being adapted to contain protons or include a proton source for emitting protons upon application of a voltage. The reversibly oxidizable layer (D) comprises a transparent dispersion layer (D1) which is made by vacuum thin film formation techniques or thick-film processes and which comprises a metal iridium, iridium oxide or iridium hydroxide disperse phase (D11) and a transparent solid dispersion medium (D12), or the reversibly oxidizable layer (D) and the other electrode (E) are replaced with a single transparent conductive dispersion material layer (D1a) which is made by vacuum thin film formation techniques or thick-film processes and which comprises a metal iridium, iridium oxide or iridium hydroxide disperse phase (D11) and a transparent conductive solid dispersion medium (D 12a).

Claims

1. An electrochromic device including one electrode layer, a cathodically coloring electrochromic layer, an ionic conductive layer, a reversibly oxidizable layer and another electrode layer, at least one of said one electrode layer and said other electrode layer being transparent, and at least one of said cathodically coloring electrochromic layer, said ionic conductive layer and said reversibly oxidizable layer being adapted to contain protons or include a proton source for emitting protons upon application of a voltage, wherein said reversibly oxidizable layer comprises a transparent dispersion layer which is made by vacuum thin film formation techniques or thick-film processes and which comprises a metal iridium, iridium oxide or iridium hydroxide disperse phase and a transparent solid dispersion medium.

2. A device according to claim 1, wherein said dispersion layer contains 5 to 95% by weight of said disperse phase.

3. A device according to claim 1, wherein said dispersion medium comprises at least one material selected from the group consisting of tin oxide, indium oxide, indium tin oxide, zinc oxide, tantalum oxide, titanium oxide, silicon oxide, tungsten oxide, molybdenum oxide, antimony oxide, magnesium fluoride and calcium fluoride.

4. A device according to claim 3, wherein said dispersion medium comprises at least one material selected from the group consisting of tin oxide, indium oxide, indium tin oxide and zinc oxide.

5. A device according to claim 1, wherein said cathodically coloring electrochromic layer comprises amorphous tungsten oxide.

6. A device according to claim 1, wherein said ionic conductive layer comprises at least one material selected from the group consisting of tantalum oxide, silicon oxide, magnesium fluoride, zirconium oxide, niobium oxide, alumina, hafnium oxide and yttrium oxide.

7. A device according to claim 1, wherein said cathodically coloring electrochromic layer comprises amorphous tungsten oxide, said ionic conductive layer comprises tantalum oxide, said disperse phase comprises iridium oxide or iridium hydroxide, and said dispersion medium comprises tin oxide.

8. An electrochromic device including an electrode layer, a cathodically coloring electrochromic layer, an ionic conductive layer, and a reversibly oxidizable layer, at least one of said cathodically coloring electrochromic layer, said ionic conductive layer and said reversibly oxidizable layer being adapted to contain protons or include a proton source for emitting protons upon application of a voltage, wherein said reversibly oxidizable layer is comprised of a transparent conductive dispersion material, is made by vacuum thin film formation techniques or thick-film processes, and comprises a metal iridium, iridium oxide or iridium hydroxide disperse phase and a transparent conductive solid dispersion medium.

9. A device according to claim 8, wherein said electrode layer is transparent.

10. A device according to claim 8, wherein said dispersion material electrode contains 5 to 95% by weight of the disperse phase.

11. A device according to claim 8, wherein said dispersion medium comprises at least one material selected from the group consisting of tin oxide, indium oxide, indium tin oxide and zinc oxide.

12. A device according to claim 8, wherein said cathodically coloring electrochromic layer comprises amorphous tungsten oxide.

13. A device according to claim 8, wherein said ionic conductive layer comprises at least one material selected from the group consisting of tantalum oxide, silicon oxide, magnesium fluoride, zirconium oxide, niobium oxide, alumina, hafnium oxide and yttrium oxide.

14. An electrochromic device including one electrode layer, a cathodically coloring electrochromic layer, a reversibly oxidizable layer and another electrode layer, at least one of said one electrode layer and said other electrode layer being transparent, and at least one of said cathodically coloring electrochromic layer and said reversibly oxidizable layer being adapted to contain protons or include a proton source for emitting protons upon application of a voltage, wherein said reversibly oxidizable layer comprises a transparent dispersion layer which is made by vacuum thin film formation techniques or thick-film processes and which comprises a metal irdium, iridium oxide or iridium hydroxide disperse phase and a transparent solid dispersion medium.

15. A device according to claim 14, wherein said dispersion layer contains 5 to 95% by weight of said disperse phase.

16. A device according to claim 14, wherein said dispersion medium comprises at least one material selected from the group consisting of tin oxide, indium oxide, indium tin oxide, zinc oxide, tantalum oxide, titanium oxide, silicon oxide, tungsten oxide, molybdenum oxide, antimony oxide, magnesium fluoride and calcium fluoride.

17. A device according to claim 16, wherein said dispersion medium comprises at least one material selected from the group consisting of tin oxide, indium oxide, indium tin oxide and zinc oxide.

18. A device according to claim 14, wherein said cathodically coloring electrochromic layer comprises amorphous tungsten oxide.

19. An electrochromic device including an electrode layer, a cathodically coloring electrochromic layer, and a reversibly oxidizable layer, at lease one of said cathodically coloring electrochromic layer and said reversibly oxidizable layer being adapted to contain protons or include a proton source for emitting protons upon application of a voltage, wherein said reversibly oxidizable layer is comprised of a transparent conductive dispersion material, is made by vacuum thin film formation techniques or thick-film processes, and comprises a metal iridium, iridium oxide or iridium hydroxide disperse phase and a transparent conductive solid dispersion medium.

20. A device according to claim 19, wherein said dispersion material contains 5 to 95% by weight of the disperse phase.

21. A device according to claim 19, wherein said dispersion medium comprises at least one material selected from the group consisting of tin oxide, indium oxide, indium tin oxide and zinc oxide.

22. A device according to claim 19, wherein said cathodically coloring electrochromic layer comprises amorphous tungsten oxide.