Electrochromic device having a current-reducing additive
First Claim
1. An electrochromic medium for use in an electrochromic device, comprising:
- at least one solvent;
an anodic electroactive material;
a cathodic electroactive material, wherein at least one of the anodic and cathodic electroactive materials is electrochromic;
a current-reducing additive, wherein the current-reducing additive comprises a polymer present in an effective concentration to reduce the current of the electrochromic medium upon application of an electrical potential relative to an electrochromic medium without the current-reducing additive by at least approximately 20%; and
wherein the electrochromic medium comprises a viscosity of less than approximately 150 cP at 20°
C.
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Abstract
An electrochromic medium for use in an electrochromic device comprising: at least one solvent; an anodic electroactive material; a cathodic electroactive material, wherein at least one of the anodic and cathodic electroactive materials is electrochromic; and a current-reducing additive, wherein the current-reducing additive comprises a polymer present in an effective concentration to materially reduce the current of the electrochromic medium upon application of an electrical potential, relative to an electrochromic medium without the current-reducing additive, while maintaining an electrochromic medium viscosity which facilitates acceptable production rates without a problematic degree of seal or other device component failure.
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Citations
60 Claims
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1. An electrochromic medium for use in an electrochromic device, comprising:
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at least one solvent;
an anodic electroactive material;
a cathodic electroactive material, wherein at least one of the anodic and cathodic electroactive materials is electrochromic;
a current-reducing additive, wherein the current-reducing additive comprises a polymer present in an effective concentration to reduce the current of the electrochromic medium upon application of an electrical potential relative to an electrochromic medium without the current-reducing additive by at least approximately 20%; and
wherein the electrochromic medium comprises a viscosity of less than approximately 150 cP at 20°
C. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. An electrochromic device, comprising:
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a first substantially transparent substrate having an electrically conductive material associated therewith;
a second substrate having an electrically conductive material associated therewith; and
an electrochromic medium contained within a chamber positioned between the first and second substrates which comprises;
at least one solvent;
an anodic electroactive material;
a cathodic electroactive material, wherein at least one of the anodic and cathodic electroactive materials is electrochromic;
a current-reducing additive, wherein the current-reducing additive comprises a polymer present in an effective concentration to reduce the current of the electrochromic medium upon application of an electrical potential relative to an electrochromic medium without the current-reducing additive by at least approximately 20%; and
wherein the electrochromic medium comprises a viscosity of less than approximately 150 cP at 20°
C. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55)
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56. An electrochromic device, comprising:
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at least one substantially transparent substrate having an electrically conductive material associated therewith; and
an electrochromic medium comprising;
at least one solvent;
an anodic electroactive material;
a cathodic electroactive material, wherein at least one of the anodic and cathodic electroactive materials is electrochromic;
a current-reducing additive, wherein the current-reducing additive comprises a polymer present in an effective concentration to reduce the current of the electrochromic medium upon application of an electrical potential relative to an electrochromic medium without the current-reducing additive by at least approximately 20%; and
wherein the electrochromic medium comprises a viscosity of less than approximately 150 cP at 20°
C.
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57. An electrochromic medium for use in an electrochromic device, comprising:
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at least one solvent;
an anodic electroactive material;
a cathodic electroactive material, wherein at least one of the anodic and cathodic electroactive materials is electrochromic;
a current-reducing additive, wherein the current-reducing additive comprises a polymer present in an effective concentration to reduce the current of the electrochromic medium upon application of an electrical potential relative to an electrochromic medium without the current-reducing additive by at least approximately 20%; and
wherein the average molecular weight of the current-reducing additive ranges from approximately 1,000 Daltons to approximately 85,000 Daltons. - View Dependent Claims (58)
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59. An electrochromic medium for use in an electrochromic device, comprising:
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at least one solvent;
an anodic electroactive material;
a cathodic electroactive material, wherein at least one of the anodic and cathodic electroactive materials is electrochromic;
a current-reducing additive, wherein the current-reducing additive is present in a concentration greater than 12% by weight; and
wherein the electrochromic medium comprises a viscosity of less than approximately 150 cP at 20°
C. - View Dependent Claims (60)
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Specification