Photostable self-erasing electrochromic device
First Claim
1. An electrochromic device comprising:
- (a) a first electrode;
(b) a second electrode, the second electrode spaced apart from the first electrode so that there is a space between the first electrode and the second electrode; and
(c) a dispersion positioned in the space between the first electrode and the second electrode, the dispersion being in electrical contact with the first electrode and with the second electrode, the dispersion comprising a polyoxometalate, a counter electrode couple and a solvent, the solvent selected from the group consisting of propylene carbonate, ethylene carbonate, gamma valerolactone, acetone, methylene chloride, ethylene dichloride, alkanes and water.
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Abstract
An electrochromic device comprising three elements. The first element is a first electrode. The second element is a second electrode. The second electrode is spaced apart from the first electrode so that there is a space between the first electrode and the second electrode. The third element is a dispersion positioned in the space. The dispersion is in electrical contact with the first electrode and with the second electrode. The dispersion comprises a polyoxometalate such as H3 PW12 O40, a counter electrode couple such as ferrocene and a solvent selected from the group consisting of propylene carbonate, ethylene carbonate, nitriles, cyanoethyl ether, water, dimethylsulfoxide, nitromethane, nitrobenzene, acetic acid, dimethoxy benzene, toluene, tetramethylene sulfone, 3-methyl sulfolane, 2-methyl glutaronitrile, cyanoethyl ether, gamma butyrolactone, gamma valerolactone and acetone. The dispersion is resistant to photodegradation such as discoloring in sunlight.
19 Citations
10 Claims
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1. An electrochromic device comprising:
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(a) a first electrode; (b) a second electrode, the second electrode spaced apart from the first electrode so that there is a space between the first electrode and the second electrode; and (c) a dispersion positioned in the space between the first electrode and the second electrode, the dispersion being in electrical contact with the first electrode and with the second electrode, the dispersion comprising a polyoxometalate, a counter electrode couple and a solvent, the solvent selected from the group consisting of propylene carbonate, ethylene carbonate, gamma valerolactone, acetone, methylene chloride, ethylene dichloride, alkanes and water. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An electrochromic device comprising:
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(a) a first electrode; (b) a second electrode, the second electrode spaced apart from the first electrode so that there is a space between the first electrode and the second electrode; and (c) a dispersion positioned in the space between the first electrode and the second electrode, the dispersion being in electrical contact with the first electrode and with the second electrode, the dispersion comprising a tungsten polyoxometalate, a counter electrode couple and a solvent, the solvent selected from the group consisting of propylene carbonate, ethylene carbonate, nitriles, cyanoethyl ether, water, dimethylsulfoxide, nitromethane, nitrobenzene, acetic acid, dimethoxy benzene, toluene, tetramethylene sulfone, 3-methyl sulfolane, 2-methyl glutaronitrile, cyanoethyl ether, gamma butyrolactone, gamma valerolactone, chlorinated hydrocarbons and acetone. - View Dependent Claims (8, 9, 10)
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Specification