The present invention relates to an electrochromic compound, and an electrochromic composition and an electrochromic device, including the same. The electrochromic compound according to the present invention may achieve excellent black coloring effects and excellent curing characteristics, and thus may be used advantageously in an electrochromic device.

An apparatus comprising a switchable optical filter comprising a layer of switchable material, the switchable material comprising a photochromic/thermochromic, a photochromic/photochromic, or a photochromic/electrochromic compound; a first light source providing light of a wavelength that causes the switchable material to transition from a faded state to a dark state, or a dark state to a faded state; and a switch for controlling activation of the first light source.

An apparatus comprising a switchable optical filter comprising a layer of switchable material, the switchable material comprising a photochromic/thermochromic, a photochromic/photochromic, or a photochromic/electrochromic compound; a first light source providing light of a wavelength that causes the switchable material to transition from a faded state to a dark state, or a dark state to a faded state; and a switch for controlling activation of the first light source.

Eyewear having electrochromic lenses for controlling a light transmissive property/tinting for a user's eye and a camera. The electrochromic lenses have an eye region for controlling light transmission to a user's eye, and a separate camera region for controlling light transmission to a camera. Two or more electrochromic lenses are provided to independently control the tinting for each of the user's eye, and two or more cameras. The electrochromic lenses comprise of multiple lens layers forming a single stack. Each layer has an opening configured to receive a fill material, such as a dye, such that the fill material can have different chemistries. The displays may also have different dye chemistries to allow for different tint ranges (wavelengths of light passed).

A view angle control device includes light transmission layers that are arranged at intervals and through which light passes, electrochromic layers having light absorption spectrum characteristics according to voltages applied thereto, the electrochromic layers and the light transmission layers being arranged alternately, first electrodes disposed on one side with respect to the electrochromic layers and arranged to be overlapped with the respective electrochromic layers and contacted with the respective electrochromic layers, and a second electrode disposed on an opposite side from the first electrodes with respect to the electrochromic layers and arranged to be overlapped with and contacted with the electrochromic layers.

An apparatus comprising a switchable optical filter comprising a layer of switchable material, the switchable material comprising a photochromic/thermochromic, a photochromic/photochromic, or a photochromic/electrochromic compound; a first light source providing light of a wavelength that causes the switchable material to transition from a faded state to a dark state, or a dark state to a faded state; and a switch for controlling activation of the first light source

An apparatus comprising a switchable optical filter comprising a layer of switchable material, the switchable material comprising a photochromic/thermochromic, a photochromic/photochromic, or a photochromic/electrochromic compound; a first light source providing light of a wavelength that causes the switchable material to transition from a faded state to a dark state, or a dark state to a faded state; and a switch for controlling activation of the first light source

The present disclosure generally relates to optoelectronic compounds, including certain 1,2-diketones, for example, 2,3,5,6-tetrafluoro-4-[2-oxo-2-(4-oxo-3-chromenyl)acetyl]benzonitrile. In certain embodiments, these compounds can be used as electrochromic media in devices requiring change of optical absorbance or transmittance as a function of applied voltage. Examples of such devices include electrochromic mirrors, windows, displays, or the like. One specific example is solar and thermal control by smart, dynamic windows for energy-efficient buildings. Other embodiments of the disclosure are generally directed to systems and devices using such compounds, methods of using such compounds, e.g., to control the absorbance or transmittance of light, kits involving such compounds, or the like.

The present disclosure generally relates to optoelectronic compounds, including certain 1,2-diketones, for example, 2,3,5,6-tetrafluoro-4-[2-oxo-2-(4-oxo-3-chromenyl)acetyl]benzonitrile. In certain embodiments, these compounds can be used as electrochromic media in devices requiring change of optical absorbance or transmittance as a function of applied voltage. Examples of such devices include electrochromic mirrors, windows, displays, or the like. One specific example is solar and thermal control by smart, dynamic windows for energy-efficient buildings. Other embodiments of the disclosure are generally directed to systems and devices using such compounds, methods of using such compounds, e.g., to control the absorbance or transmittance of light, kits involving such compounds, or the like.

Herein are described two-dimensional metal organic frameworks (2D MOFs). The 2D MOFs includes a plurality of multivalent metals or metal ions and a plurality of multidentate ligands arranged to form a crystalline structure having a lateral size of at least about 2.5 μm and a thickness of less than about 5 nm. Herein are also described methods for preparing the 2D MOFs. The 2D MOFs can be used, for example, in electrochromic devices such as smart windows and flexible displays.