Electrochromic structures and methods

• US 5,699,192 A
• Filed: 08/07/1995
• Issued: 12/16/1997
• Est. Priority Date: 04/10/1992
• Status: Expired due to Term

• Current Assignee: Sage Electrochromics, Inc (Compagnie de Saint-Gobain SA)
• Original Assignee: Sun Active Glass Electrochromics Incorporated
• Inventors: Van Dine, John E., Klein, Lisa C., Parkhe, V. D., Trumbore, Forrest A.
• Primary Examiner(s): Nelms, David C.
• Assistant Examiner(s): Robbins, Thomas
• Application Number:
  US08/511,628
• Time in Patent Office: 862 Days
• Field of Search: 359/265, 359/269
• US Class Current: 359/269
• CPC Class Codes: B32B 17/10036 comprising two outer glass sheets
• CPC Class Codes: B32B 17/10174 Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
• CPC Class Codes: B32B 17/10761 containing vinyl acetal
• CPC Class Codes: B32B 17/10788 containing ethylene vinylacetate
• CPC Class Codes: C03C 17/3411 with at least two coatings of inorganic materials C03C17/36, C03C17/42 take precedence
• CPC Class Codes: C23C 18/1254 Sol or sol-gel processing
• CPC Class Codes: G02F 1/1525 characterised by a particular ion transporting layer, e.g. electrolyte

Abstract

Electrochromic devices applied to a substrate are disclosed, including an electrochromic electrode layer, a counterelectrode layer, and an ion-conducting layer sandwiched between those two layers and electrically isolating them from each other, in which the ion-conducting layer is substantially uniform across the substrate and comprises an inorganic superstructure with associated organic material and with a microstructure which facilitates the transfer of ions. Methods for producing these devices are also disclosed, including depositing the ion-conducting layer on the substrate in the form of a solution, and effecting gelation of that solution.

Claims

1. An electrochromic device applied to a substrate comprising an electrochromic layer as a first electrode, a counterelectrode layer as a second electrode, and an ion-conducting layer for conducting ions between said first and second electrodes, said ion-conducting layer being substantially transparent in the visible range, having a substantially uniform thickness, comprising inorganic material with associated residual hydroxyl and/or organic material, and having a microstructure facilitating the transfer of said ions therethrough.

2. The electrochromic device of claim 1 wherein said ion-conducting layer has a substantially uniform thickness comprising a thickness selected from between about 200 and 5,000 Angstroms.

3. The electrochromic device of claim 2 wherein said ion-conducting layer has a substantially uniform thickness comprising a thickness selected from between about 500 and 2,000 Angstroms.

4. The electrochromic device of claim 1 wherein said residual organic material is present in an amount of less than about 1 wt. %.

5. The electrochromic device of claim 1 wherein said ion-conducting layer is in direct contact with and electrically insulates said first and second electrodes.

6. The electrochromic device of claim 1 wherein said electrochromic layer includes residual hydroxyl and/or organic materials.

7. The electrochromic device of claim 1 wherein said counterelectrode layer includes residual hydroxyl and/or organic materials therein.

8. The electrochromic device of claim 1 wherein said ion-conducting layer comprises a lithium-ion-conducting layer.

9. The electrochromic device of claim 8 wherein said lithium-ion-conducting layer comprises a lithium-based ceramic material.

10. The electrochromic device of claim 9 wherein said lithium-based ceramic material is selected from the group consisting of lithium silicate, lithium borosilicate, lithium aluminum silicate, lithium niobate, lithium nitride, and lithium aluminum fluoride.

11. The electrochromic device of claim 1 wherein said ion-conducting layer comprises a hydrogen ion-conducting layer.

12. The electrochromic device of claim 11 wherein said hydrogen ion-conducting layer comprises silicon dioxide.

13. The electrochromic device of claim 1 wherein said substrate comprises glass.

14. The electrochromic device of claim 1 wherein said electrochromic layer is selected from the group consisting of tungsten oxide, niobium oxide, titanium oxide, molybdenum oxide, nickel oxide, iridium oxide, and mixtures thereof.

15. The electrochromic device of claim 14 wherein said electrochromic layer comprises tungsten oxide.

16. The electrochromic device of claim 1 wherein said counterelectrode layer is selected from the group consisting of vanadium pentoxide, niobium oxide, indium oxide, nickel oxide, cobalt oxide, molybdenum oxide, and mixtures thereof.

17. The electrochromic device of claim 16 wherein said counterelectrode layer comprises vanadium pentoxide.

18. The electrochromic device of claim 1 wherein said ion-conducting layer is primarily exclusively inorganic material.

19. An electrochromic device applied to a substrate comprising an electrochromic layer as a first electrode, a counterelectrode layer as a second electrode, an ion-conducting layer for conducting ions between said first and second electrodes, said ion-conducting layer being substantially transparent in the visible range, having a substantially uniform thickness, comprising inorganic material with associated residual hydroxyl and/or organic material, and having a microstructure facilitating the transfer of said ions therethrough, and first and second transparent conductive layers in contact with said electrochromic layer and said counterelectrode layer, respectively, for facilitating the flow of electrons therebetween.

20. The electrochromic device of claim 19 wherein said ion-conducting layer has a substantially uniform thickness comprising a thickness selected from between about 200 and 5,000 Angstroms.

21. The electrochromic device of claim 19 wherein said ion-conducting layer has a substantially uniform thickness comprising a thickness selected from between about 500 and 2,000 Angstroms.

22. The electrochromic device of claim 19 wherein said ion-conducting layer is in direct contact with and electrically insulating said first and second electrodes.

23. The electrochromic device of claim 19 wherein said electrochromic layer includes residual hydroxyl and/or organic materials.

24. The electrochromic device of claim 19 wherein said counterelectrode layer includes residual hydroxyl and/or organic materials therein.

25. The electrochromic device of claim 19 wherein said ion-conducting comprises a lithium-ion-conducting layer.

26. The electrochromic device of claim 25 wherein said lithium-ion-conducting layer comprises a lithium-based ceramic material.

27. The electrochromic device of claim 26 wherein said lithium-based ceramic material is selected from the group consisting of lithium silicate, lithium borosilicate, lithium aluminum silicate, lithium niobate, lithium nitride, and lithium aluminum fluoride.

28. The electrochromic device of claim 19 wherein said ion-conducting layer comprises a hydrogen ion-conducting layer.

29. The electrochromic device of claim 28 wherein said hydrogen ion-conducting layer comprises silicon dioxide.

30. The electrochromic device of claim 19 wherein said substrate comprises glass.

31. The electrochromic device of claim 19 wherein said first and second conductive layers comprise conductive metal oxides.

32. The electrochromic device of claim 31 wherein said conductive metal oxides comprise tin doped indium oxide.

33. The electrochromic device of claim 19 wherein at least one of said first and second transparent conductive layers comprises a thin metal layer and an optical tuning layer.

34. The electrochromic device of claim 33 wherein said optical tuning layer comprises a metal oxide layer.

35. The electrochromic device of claim 19 wherein said ion-conducting layer is primarily exclusively inorganic material.

36. The electrochromic device of claim 19 wherein said residual organic material is present in an amount of less than about 1 wt. %.

37. An electrochromic device applied to a substrate comprising an electrochromic layer as a first electrode, a counterelectrode layer as a second electrode, and an ion-conducting layer for conducting ions between said first and second electrodes, said ion-conducting layer having a substantially uniform thickness and comprising inorganic material with associated residual hydroxyl and/or organic material, and having a microstructure facilitating the transfer of said ions therethrough, said residual organic material being present in an amount of less than about 1 wt. %.

38. The electrochromic device of claim 37 wherein said ion-conducting layer has a substantially uniform thickness comprising a thickness selected from between about 200 and 5,000 Angstroms.

39. The electrochromic device of claim 38 wherein said ion-conducting layer has a substantially uniform thickness comprising a thickness selected from between about 500 and 2,000 Angstroms.

40. The electrochromic device of claim 37 wherein said ion-conducting layer comprises a lithium ion-conducting layer.

41. The electrochromic device of claim 40 wherein said lithium ion-conducting layer comprises lithium-based ceramic material.

42. The electrochromic device of claim 41 wherein said lithium-based ceramic material is selected from the group consisting of lithium silicate, lithium borosilicate, lithium aluminum silicate, lithium niobate, lithium nitride, and lithium aluminum fluoride.

43. The electrochromic device of claim 37 wherein said ion-conducting layer comprises a hydrogen ion-conducting layer.

44. The electrochromic device of claim 43 wherein said hydrogen ion-conducting layer comprises silicon dioxide.

45. An electrochromic device applied to a substrate comprising an electrochromic layer as a first electrode, a counterelectrode layer as a second electrode, an ion-conducting layer for conducting ions between said first and second electrodes, said ion-conducting layer having a substantially uniform thickness and comprising inorganic material with associated residual hydroxyl and/or organic material, said residual organic material being present in an amount of less than about 1 wt. %, and having a microstructure facilitating the transfer of said ions therethrough, and first and second transparent conductive layers in contact with said electrochromic layer and said counterelectrode layer, respectively, for facilitating the flow of electrons therebetween.

46. The electrochromic device of claim 45 wherein said ion-conducting layer has a substantially uniform thickness comprising a thickness selected from between about 200 and 5,000 Angstroms.

47. The electrochromic device of claim 45 wherein said ion-conducting layer has a substantially uniform thickness comprising a thickness selected from between abut 500 and 2,000 Angstroms.

48. The electrochromic device of claim 45 wherein said ion-conducting layer is in direct contact with and electrically insulating said first and second electrodes.

49. The electrochromic device of claim 45 wherein said electrochromic layer includes residual hydroxyl and/or organic materials therein.

50. The electrochromic device of claim 45 wherein said counterelectrode layer includes residual hydroxyl and/or organic materials therein.

51. The electrochromic device of claim 45 wherein said ion-conducting layer comprises a lithium ion-conducting layer.

52. The electrochromic device of claim 51 wherein said lithium ion-conducting layer comprises a lithium-based ceramic material.

53. The electrochromic device of claim 45 wherein said substrate comprises glass.

54. The electrochromic device of claim 45 wherein said first and second conductive layers comprise conductive metal oxides.

55. The method of claim 54 wherein said conductive metal oxides comprise tin doped indium oxide.

56. The electrochromic device of claim 45 wherein at least one of said first and second transparent conductive layers comprises a thin metal layer and an optical tuning layer.

57. The electrochromic device of claim 56 wherein said optical tuning layer comprises a metal oxide layer.

58. An electrochromic device applied to a substrate comprising an electrochromic layer as a first electrode, a counterelectrode layer as a second electrode, and an ion-conducting layer for conducting ions between said first and second electrodes, said ion-conducting layer having a substantially uniform thickness comprising a thickness selected from between about 200 and 5,000 Angstroms and comprising inorganic material with associated residual hydroxyl and/or organic material, and having a microstructure facilitating the transfer of said ions therethrough.

59. The electrochromic device of claim 58 wherein said ion-conducting layer has a substantially uniform thickness comprising a thickness selected from between about 500 and 2,000 Angstroms.

60. The electrochromic device of claim 58 wherein said residual organic material is present in an amount of less than about 1 wt. %.

61. The electrochromic device of claim 58 wherein said ion-conducting layer comprises a lithium ion-conducting layer.

62. The electrochromic device of claim 61 wherein said lithium ion-conducting layer comprises a lithium-based ceramic material.

63. The electrochromic device of claim 58 wherein said ion-conducting layer comprises a hydrogen ion-conducting layer.

64. The electrochromic layer device of claim 63 wherein said hydrogen ion-conducting layer comprises silicon dioxide.

65. An electrochromic device applied to a substrate comprising an electrochromic layer as a first electrode, a counterelectrode layer as a second electrode, an ion-conducting layer for conducting ions between said first and second electrodes, said ion-conducting layer having a substantially uniform thickness comprising a thickness selected from between about 200 and 5,000 Angstroms and comprising inorganic material with associated residual hydroxyl and/or organic material, and having a microstructure facilitating the transfer of said ions therethrough, and first and second transparent conductive layers in contact with said electrochromic layer and said counterelectrode layer, respectively, for facilitating the flow of electrons therebetween.

66. The electrochromic device of claim 65 wherein said ion-conducting layer has a substantially uniform thickness comprising a thickness selected from between about 500 and 2,000 Angstroms.

67. The electrochromic device of claim 65 wherein said ion-conducting layer is in direct contact with and electrically insulating said first and second electrodes.

68. The electrochromic device of claim 65 wherein said electrochromic layer includes residual hydroxyl, and/or organic materials therein.

69. The electrochromic device of claim 65 wherein said counterelectrode layer includes residual hydroxyl and/or organic materials therein.

70. The electrochromic device of claim 65 wherein said ion-conducting layer comprises a lithium ion-conducting layer.

71. The electrochromic device of claim 70 wherein said lithium ion-conducting layer comprises a lithium-based ceramic material.

72. The electrochromic device of claim 71 wherein said lithium-based ceramic material is selected from the group consisting of lithium silicate, lithium borosilicate, lithium aluminum silicate, lithium niobate, lithium nitride, and lithium aluminum fluoride.

73. The electrochromic device of claim 65 wherein said ion-conducting layer, comprises a hydrogen ion-conducting layer.

74. The electrochromic device of claim 73 wherein said hydrogen ion-conducting layer comprises silicon dioxide.

75. The electrochromic device of claim 65 wherein said first and second conductive layers comprise conductive metal oxides.

76. The electrochromic device of claim 75 wherein at least one of said first and second transparent conductive layers comprises a thin metal layer and an optical tuning layer.

77. The electrochromic device of claim 65 wherein said optical tuning layer comprises a metal oxide layer.

78. The electrochromic device of claim 77 wherein said conductive metal oxides comprise tin doped indium oxide.