Durable electrooptic devices comprising ionic liquids
First Claim
1. An electrochromic device, comprising:
- a first substrate having a transparent conductor coated surface,a second substrate having a second conductor coated surface,an electrolyte medium comprising ionic liquid and disposed between said first substrate and said second substrate, the ionic liquid comprising anions,at least one conductive surface on at least one of said transparent conductor coated surface and said second conductor coated surface, said conductive surface comprising a coating of nanostructured material,an electrochromic dye attached to said nanostructured material, wherein the anion of the attached dye is same as the anion of the ionic liquid.
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Accused Products
Abstract
Electrolyte solutions for electrochromic devices such as rear view mirrors and displays with low leakage currents are prepared using inexpensive, low conductivity conductors. Preferred electrolytes include bifunctional redox dyes and molten salt solvents with enhanced stability toward ultraviolet radiation. The solvents include lithium or quaternary ammonium cations, and perfluorinated sulfonylimide anions selected from trifluoromethylsulfonate (CF3SO3−), bis(trifluoromethylsulfonyl)imide ((CF3SO2)2N−), bis(perfluoroethylsulfonyl)imide ((CF3CF2SO2)2N−) and tris(trifluoromethylsulfonyl)methide ((CF3SO2)3C−). Electroluminescent, electrochromic and photoelectrochromic devices with nanostructured electrodes include ionic liquids with bifunctional redox dyes. Some of the electrolyte solutions color to red when devices employing the solutions are powered, leading to red or neutral electrooptic devices.
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Citations
16 Claims
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1. An electrochromic device, comprising:
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a first substrate having a transparent conductor coated surface, a second substrate having a second conductor coated surface, an electrolyte medium comprising ionic liquid and disposed between said first substrate and said second substrate, the ionic liquid comprising anions, at least one conductive surface on at least one of said transparent conductor coated surface and said second conductor coated surface, said conductive surface comprising a coating of nanostructured material, an electrochromic dye attached to said nanostructured material, wherein the anion of the attached dye is same as the anion of the ionic liquid. - View Dependent Claims (2, 3)
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4. An electro-optic device, comprising:
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at least one chamber, and an electrolyte medium inside the chamber and comprising a first compound of the formula - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An electrochromic device, comprising:
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a first electrode comprising a transparent or translucent substrate, an electrically conducting coating on said substrate, and on said electrically conducting coating a nanostructured film comprising a conducting or semiconducting metal oxide having a first redox chromophore adsorbed thereto, a second electrode comprising a transparent or translucent substrate, an electrically conducting coating on said substrate, and on the coating a nanostructured film comprising a conducting metal oxide having a second redox chromophore adsorbed thereto an electrolyte between said first electrode and said second electrode, wherein at least one of said first redox chromophore and said second redox chromophore comprises a compound of the formula - View Dependent Claims (15, 16)
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Specification