Electrochromic composition and electrochromic device using same
First Claim
1. An electrochromic composition comprising:
- a solvent comprising one of propylene carbonate, N-methylpyrrolidone, polyethylene glycol, or an ester thereof;
a cathodic component in the form of a quaternary salt of dipyridine, the cathodic component comprising;
a quaternary salt comprising one of 1,1′
-dimethyl-4,4′
-dipyridinium, 1,1′
-diethyl-4,4′
-dipyridinium or 1,1′
-dibenzyl-4,4′
-dipyridinium and one of CF3SO3−
or (CF3SO2)2N−
, the quaternary salt being present at a concentration of 0.4-0.3.6 mass % on the basis of a total mass of the electrochromic composition, anda balance comprising the solvent;
an anodic component in the form of a ferrocene derivative, the anodic component comprising;
ferrocene or 1,1′
-diethylferrocene at a concentration of 0.3-3.0 mass %, on the basis of a total mass of the electrochromic composition, anda balance comprising the solvent;
a polymeric thickener comprising a copolymer of methylacrylate and one of a polylactic acid or poly-3-hydroxybutyrateat least one antioxidant comprising ionol; and
an ultraviolet filter comprising a cinnamate.
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Accused Products
Abstract
Electrochromic compositions for use in devices with electrically controlled absorption of light such as light filters of variable optical density, light emission modulators, and information image displays. The described electrochromic compositions may be used, for example, for creating light-transmitting coatings of buildings for controlling indoor microclimate by regulating the flow of natural light. Specifically, described is an exemplary organic electrochromic composition that is based on biocompatible and biodegradable components and is characterized by an increased service life, a high rate of light-transmission change. The described electrochromic compositions may be prepared in a wide range of light-absorption spectra and coating colors.
144 Citations
8 Claims
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1. An electrochromic composition comprising:
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a solvent comprising one of propylene carbonate, N-methylpyrrolidone, polyethylene glycol, or an ester thereof; a cathodic component in the form of a quaternary salt of dipyridine, the cathodic component comprising; a quaternary salt comprising one of 1,1′
-dimethyl-4,4′
-dipyridinium, 1,1′
-diethyl-4,4′
-dipyridinium or 1,1′
-dibenzyl-4,4′
-dipyridinium and one of CF3SO3−
or (CF3SO2)2N−
, the quaternary salt being present at a concentration of 0.4-0.3.6 mass % on the basis of a total mass of the electrochromic composition, anda balance comprising the solvent; an anodic component in the form of a ferrocene derivative, the anodic component comprising; ferrocene or 1,1′
-diethylferrocene at a concentration of 0.3-3.0 mass %, on the basis of a total mass of the electrochromic composition, anda balance comprising the solvent; a polymeric thickener comprising a copolymer of methylacrylate and one of a polylactic acid or poly-3-hydroxybutyrate at least one antioxidant comprising ionol; and an ultraviolet filter comprising a cinnamate. - View Dependent Claims (2, 3, 4)
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5. An electrochromic device comprising an electrochromic composition, the electrochromic composition comprising:
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a solvent comprising one of propylene carbonate, N-methylpyrrolidone, polyethylene glycol, or an ester thereof; a cathodic component in the form of a quaternary salt of dipyridine, the cathodic component comprising; a quaternary salt comprising one of 1,1′
-dimethyl-4,4′
-dipyridinium, 1,1′
-diethyl-4,4′
-dipyridinium or 1,1′
-dibenzyl-4,4′
-dipyridinium and one of CF3SO3−
or (CF3SO2)2N−
, the quaternary salt being present at a concentration of 0.4-3.6 mass % on the basis of a total mass of the electrochromic composition, anda balance comprising the solvent; an anodic component in the form of a ferrocene derivative, the anodic component comprising; ferrocene or 1,1′
-diethylferrocene, at a concentration of 0.3-3.0 mass % on the basis of a total mass of the electrochromic composition, anda balance comprising the solvent; a polymeric thickener comprising a copolymer of methylacrylate and one of a polylactic acid or poly-3-hydroxybutyrate at least one antioxidant comprising ionol; and an ultraviolet filter comprising a cinnamate. - View Dependent Claims (6, 7, 8)
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Specification