Color-stabilized electrochromic devices
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Abstract
An electrochromic medium for use in a normally operating electrochromic device comprising an anodic material and a cathodic material wherein both of the anodic and cathodic materials are electroactive and at least one of the anodic and cathodic materials is electrochromic, an additive, and means associated with the additive for maintaining a colorless or nearly colorless electrochromic medium while the electrochromic medium is in a high transmission state relative to an electrochromic medium without the additive.
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Citations
74 Claims
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1-30. -30. (canceled).
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31. An electrochromic medium, comprising:
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an anodic material and a cathodic material, wherein both of the anodic and cathodic materials are electroactive and at least one of the anodic and cathodic materials is electrochromic;
an additive, wherein the additive is more easily reduced than the cathodic material, and wherein the additive substantially precludes the formation of a residual reduced cathodic material while the electrochromic medium is in a high transmission state; and
wherein the electrochromic medium comprises a cross-linked polymer matrix. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40)
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41. An electrochromic medium, comprising:
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an anodic material and a cathodic material, wherein both of the anodic and cathodic materials are electroactive and at least one of the anodic and cathodic materials is electrochromic;
an additive, wherein the additive comprises a reduced form of the cathodic material; and
wherein the electrochromic medium comprises a cross-linked polymer matrix. - View Dependent Claims (42, 43, 44, 45, 46, 47, 48)
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49. An electrochromic medium, comprising:
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an anodic material and a cathodic material, wherein both of the anodic and cathodic materials are electroactive and at least one of the anodic and cathodic materials is electrochromic;
an additive, wherein the additive is more easily oxidized than the anodic material, and wherein the additive substantially precludes the formation of a residual oxidized anodic material while the electrochromic medium is in a high transmission state, said additive being selected from the group comprising substituted ferrocenes, substituted ferrocenyl salts, and mixtures thereof, and wherein the electrochromic medium comprises a cross-linked polymer matrix. - View Dependent Claims (50, 51, 52, 53, 54, 55)
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56. An electrochromic medium, comprising:
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an anodic material and a cathodic material, wherein both of the anodic and cathodic materials are electroactive and at least one of the anodic and cathodic materials is electrochromic;
an additive, wherein the additive comprises;
a first component that is more easily reduced than the cathodic material; and
a second component that is more easily oxidized than the anodic material; and
wherein the electrochromic medium comprises a cross-linked polymer matrix. - View Dependent Claims (57, 58, 59, 60, 61, 62, 63)
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64. An electrochromic medium, comprising:
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an anodic material and a cathodic material, wherein both of the anodic and cathodic materials are electroactive and at least one of the anodic and cathodic materials is electrochromic;
an additive and means associated with the additive for maintaining a nearly colorless electrochromic medium while the electrochromic medium is in a high transmission state relative to an electrochromic medium without the additive; and
wherein the electrochromic medium comprises a cross-linked polymer matrix. - View Dependent Claims (65, 66, 67, 68, 69, 70, 71, 72, 73, 74)
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Specification