Color-stabilized electrochromic devices
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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
63 Claims
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1. (canceled)
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2. An electrochromic device, comprising:
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(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;
(4) a color-stabilizing additive; and
(5) wherein the electrochromic medium comprises a cross-linked polymer matrix; and
(d) wherein the electrochromic device exhibits an absolute value of Δ
b* of less than 10.00 after being exposed to 85 degrees centigrade for approximately 4,300 hours. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9)
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10. An electrochromic device, comprising:
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(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;
(4) a color-stabilizing additive; and
(5) wherein the electrochromic medium comprises a cross-linked polymer matrix; and
(d) wherein the electrochromic device exhibits an absolute value of Δ
E of less than 10.00 after being exposed to 85 degrees centigrade for approximately 4,300 hours. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. An electrochromic device, comprising:
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(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;
(4) a color-stabilizing additive; and
(5) wherein the electrochromic medium comprises a cross-linked polymer matrix; and
(d) wherein the electrochromic device exhibits an absolute value of Δ
b* of less than 6.00 after being exposed to ultraviolet radiation for approximately 2,000 hours while in a weatherometer. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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26. An electrochromic device, comprising:
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(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;
(4) a color-stabilizing additive; and
(5) wherein the electrochromic medium comprises a cross-linked polymer matrix; and
(d) wherein the electrochromic device exhibits an absolute value of Δ
E of less than 9.00 after being exposed to ultraviolet radiation for approximately 2,000 hours while in a weatherometer. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33)
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34. An electrochromic device, comprising:
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(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;
(4) a color-stabilizing additive; and
(5) wherein the electrochromic medium comprises a cross-linked polymer matrix; and
(d) wherein the electrochromic device exhibits an absolute value of Δ
b* of less than 10.00 after being exposed to approximately 10,000 hours of ultraviolet radiation in a weatherometer while cycling, each cycle consisting of an electrical potential application of approximately 1.2V for 30 seconds and an electrical potential application of approximately 0.0V for 30 seconds. - View Dependent Claims (35, 36, 37, 38, 39, 40)
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41. An electrochromic device, comprising:
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(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;
(4) a color-stabilizing additive; and
(5) wherein the electrochromic medium comprises a cross-linked polymer matrix; and
(d) wherein the electrochromic device exhibits an absolute value of Δ
E of less than 10.00 after being exposed to approximately 10,000 hours of ultraviolet radiation in a weatherometer while cycling, each cycle consisting of an electrical potential application of approximately 1.2V for 30 seconds and an electrical potential application of approximately 0.0V for 30 seconds. - View Dependent Claims (42, 43, 44, 45, 46, 47)
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48. An electrochromic device, comprising:
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(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;
(4) a color-stabilizing additive; and
(5) wherein the electrochromic medium comprises a cross-linked polymer matrix; and
(d) wherein the electrochromic device exhibits an absolute value of Δ
b* of less than 10.00 after being exposed to approximately 6,300 hours of cycling at 70 degrees centigrade, each cycle consisting of an electrical potential application of approximately 1.2V for 30 seconds and an electrical potential application of approximately 0.0V for 30 seconds. - View Dependent Claims (49, 50, 51, 52, 53, 54, 55)
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56. An electrochromic device, comprising:
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(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;
(4) a color-stabilizing additive; and
(5) wherein the electrochromic medium comprises a cross-linked polymer matrix; and
(d) wherein the electrochromic device exhibits an absolute value of Δ
E of less than 10.00 after being exposed to approximately 6,300 hours of cycling at 70 degrees centigrade, each cycle consisting of an electrical potential application of approximately 1.2V for 30 seconds and an electrical potential application of approximately 0.0V for 30 seconds. - View Dependent Claims (57, 58, 59, 60, 61, 62, 63)
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Specification