Electrochromic dyes and their use in electrochromic devices
AssigneePolyceed Inc.
InventorsAnoop Agrawal, John Cronin, Lori Adams, Sahila Perananthan
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Abstract
This disclosure provides compositions of electrochromic dyes, functionalized electrochromic dyes and dye macromers which may be incorporated into electrochromic devices with tailored optical properties. The disclosure provides an electrochromic dye with an attached functionalization group wherein the said dye colors by at least one of oxidation and reduction and contains at least two moieties wherein a first moiety is electrochromic and a second moiety is an electrochromic moiety, an electron donating moiety, or an electron receiving moiety and wherein the functionalization group. This disclosure also provides EC compositions and devices for controlling color.
Claims22
An electrochromic device having:
- two clear substrates, each of which is coated with a first electrically conductive coating and a second electrically conductive coating, wherein at least one of the first and second electrically conductive coatings is transparent;
- and
- an electrolyte between the two electrically conductive coatings, wherein the electrolyte has at least one bridged electrochromic (EC) dye and at least one additional EC dye which is not bridged, wherein the at least one additional EC dye has anodic or cathodic characteristics.
An electrochromic device which colors to a colored state wherein a* and b* of light passing through the device are between +6 and −20, the electrochromic device comprising:
- (i) two clear substrates, each of which is coated with a first electrically conductive coating and a second electrically conductive coating, wherein the first and second electrically conductive coatings are transparent and their surface resistivity is in the range of 0.1 ohms/square to 10 ohms/square;
- and
- (ii) an electrolyte between the first and second electrically conductive coatings, wherein the electrolyte contains at least three dyes, wherein a first dye is a viologen salt, and a second dye and a third dye are each from a different class of dyes selected from the group consisting of a thiophene, a phenothiazine, and a phenazine.
An electrochromic device having:
- two clear substrates, each of which is coated with a first electrically conductive coating and a second electrically conductive coating, wherein one of the first and second electrically conductive coatings is transparent;
- and
- an electrolyte between the two conductive coatings, wherein the electrolyte has at least one bridged electrochromic (EC) dye and at least one additional EC dye which is not bridged, wherein the at least one additional EC dye has anodic or cathodic characteristics,
- wherein the device colors to a colored state wherein the light passing through the device in the colored state has color coordinates of a* and b* between +6 and −20.
An electrochromic device having:
- two clear substrates, each of which is coated with a first electrically conductive coating and a second electrically conductive coating, wherein one of the first and second electrically conductive coatings is transparent;
- and
- an electrolyte between the two conductive coatings, wherein the electrolyte has at least one bridged electrochromic (EC) dye and at least one additional EC dye which is also bridged, wherein the at least one additional EC dye has anodic or cathodic characteristics,
- wherein the device colors to a colored state wherein the light passing through the device in the colored state has color coordinates of a* and b* between +6 and −20.
Dependencies are inferred from the claim text.