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.

An electro-optic assembly includes a first substrate and a second substrate that is disposed in a substantially parallel spaced apart relationship with the first substrate. A first conductive layer is disposed on the first substrate, and a second conductive layer is disposed on the second substrate. A cathodic electro-optic film is in contact with the second conductive layer and includes a cathodic species. An anodic electro-optic film is in contact with the first conductive layer. The anodic electro-optic film includes a plurality of anodic species mixed at a molar ratio that is configured to generally maintain an a* value and a b* value of the electro-optic assembly both staying between −8 and 8 between a high-end transmission state and a fully darkened state caused by an applied voltage range. An electrolyte medium is disposed between the cathodic and anodic electro-optic films.

An anodic redox species including a phenazine compound that is substituted with at least one sterically hindered group and an electrochromic device using these chemical compounds are disclosed.

An anodic redox species including a phenazine compound that is substituted with at least one sterically hindered group and an electrochromic device using these chemical compounds are disclosed.

An electrochromic element is provided including: a first substrate; a first electrode overlying the first substrate; a second substrate disposed at a distance from the first electrode; a second electrode overlying the second substrate; a first electrochemical reaction layer in contact with the first electrode; a second electrochemical reaction layer in contact with the second electrode; and an electrolyte layer between the first electrode and the second electrode. One of the first electrochemical reaction layer and the second electrochemical reaction layer is in a reversibly oxidizable state and the other is in a reversibly reducible state, at least one of the first electrochemical reaction layer and the second electrochemical reaction layer is an electrochromic layer, and E1≥−0.8 V (vs. FC/FC.sup.+) and E2≥−0.8 V (vs. FC/FC.sup.+) are satisfied, where E1 and E2 represent oxidation-reduction potentials of the first electrochemical reaction layer and the second electrochemical reaction layer, respectively.

An electrochromic element is provided including: a first substrate; a first electrode overlying the first substrate; a second substrate disposed at a distance from the first electrode; a second electrode overlying the second substrate; a first electrochemical reaction layer in contact with the first electrode; a second electrochemical reaction layer in contact with the second electrode; and an electrolyte layer between the first electrode and the second electrode. One of the first electrochemical reaction layer and the second electrochemical reaction layer is in a reversibly oxidizable state and the other is in a reversibly reducible state, at least one of the first electrochemical reaction layer and the second electrochemical reaction layer is an electrochromic layer, and E1≥−0.8 V (vs. FC/FC.sup.+) and E2≥−0.8 V (vs. FC/FC.sup.+) are satisfied, where E1 and E2 represent oxidation-reduction potentials of the first electrochemical reaction layer and the second electrochemical reaction layer, respectively.

The present invention relates to an electrochromic nanoparticle having a core-shell structure. The invention provides an electrochromic nanoparticle comprising: a core formed of a first electrochromic material; and a shell encompassing the core and formed of a second electrochromic material, wherein the first electrochromic material is formed of at least one type of transition metal oxide.

The disclosed subject matter relates to electrochromic devices including variable electrochromic light filter devices that may be configured to vary the transmissivity of light therethrough in response to an applied voltage from one or more control circuits, device components, electroactive photocurable compositions, cured electroactive polymer compositions used therein and methods of forming the aforementioned devices and electroactive polymer compositions.

The disclosed subject matter relates to electrochromic devices including variable electrochromic light filter devices that may be configured to vary the transmissivity of light therethrough in response to an applied voltage from one or more control circuits, device components, electroactive photocurable compositions, cured electroactive polymer compositions used therein and methods of forming the aforementioned devices and electroactive polymer compositions.

An electrochromic medium for use in an electro-optic device comprises a solvent comprising at least one low-volatile organic electrolyte solvent based on a cyclic carbonate ester; an anodic electroactive material; and a cathodic electroactive material; and at least one of the anodic and cathodic electroactive materials is electrochromic.