Color-stabilized electrochromic devices
First Claim
1. An electrochromic device, comprising:
- (a) at least one substrate having an electrically conductive material associated therewith;
(b) an electrochromic medium which comprises a color-stabilizing additive; and
(c) wherein the electrochromic device exhibits an absolute value of Δ
b* of less than approximately 10.00 after being exposed to approximately 85 degrees centigrade for approximately 4,300 hours.
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Abstract
An electrochromic device comprising: (a) a first substantially transparent substrate having an electrically conductive material associated therewith; (b) a second substrate having an electrically conductive material associated therewith; (c) an electrochromic medium contained within a chamber positioned between the first and second substrates which comprises: (1) a solvent; (2) a cathodic electroactive material; (3) an anodic electroactive material, wherein at least one of the anodic and cathodic electroactive materials is electrochromic; and (4) a color-stabilizing additive, wherein the color-stabilizing additive is electroactive within a normal operating voltage of the electrochromic device; and (d) means associated with the color-stabilizing additive for maintaining an at least nearly colorless electrochromic device while the electrochromic device is in an open circuit and/or zero potential state relative to the same device without the color-stabilizing additive.
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Citations
20 Claims
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1. An electrochromic device, comprising:
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(a) at least one substrate having an electrically conductive material associated therewith; (b) an electrochromic medium which comprises a color-stabilizing additive; and (c) wherein the electrochromic device exhibits an absolute value of Δ
b* of less than approximately 10.00 after being exposed to approximately 85 degrees centigrade for approximately 4,300 hours. - View Dependent Claims (2, 3, 4, 5)
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6. An electrochromic device, comprising:
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(a) at least one substrate having an electrically conductive material associated therewith; (b) an electrochromic medium which comprises a color-stabilizing additive; and (c) wherein the electrochromic device exhibits an absolute value of Δ
E of less than approximately 10.00 after being exposed to approximately 85 degrees centigrade for approximately 4,300 hours. - View Dependent Claims (7, 8, 9, 10)
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11. An electrochromic device, comprising:
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(a) at least one substrate having an electrically conductive material associated therewith; (b) an electrochromic medium which comprises a color-stabilizing additive; and (c) wherein the electrochromic device exhibits an absolute value of Δ
b* of less than approximately 6.00 after being exposed to ultraviolet radiation for approximately 2,000 hours while in a weatherometer. - View Dependent Claims (12, 13, 14, 15)
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16. An electrochromic device, comprising:
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(a) at least one substrate having an electrically conductive material associated therewith; (b) an electrochromic medium which comprises a color-stabilizing additive; and (c) wherein the electrochromic device exhibits an absolute value of Δ
E of less than approximately 9.00 after being exposed to ultraviolet radiation for approximately 2,000 hours while in a weatherometer. - View Dependent Claims (17, 18, 19, 20)
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Specification