Abstract: An electrode construction for incorporation into an electrochromic display device with a substrate; an electrochromic material applied to the substrate in a spatially resolved manner. The electrochromic material is (a) applied to the substrate with a resolution of greater than about 75 dpi and (b) the spatial resolution is obtained by a non-photolithographic method. The substrate may have a mesoporous morphology. Printing methods such as ink-jet printing may be used. Other materials such as masking materials, charge storing materials, complementary electrochromic materials and the mesoporous material itself may be set down by ink-jet methods. The electrodes construction may be included in electrochromic devices. The resolution obtained is high and devices incorporating these materials may be addressable.

Abstract: An electrochromic or photoelectrochromic device possessing the property of changing color under the effect of an electric voltage and/or of a variation in the intensity of a light radiation, this device comprising at least one cathode and one anode, at least one of these electrodes being constituted at least in part of a transparent or translucent substrate bearing an electrically conductive coating, and an electrolyte arranged between these electrodes, and an electric circuit connecting said cathode and anode, characterized in that at least one of these electrodes carries a coating constituted of at least one nanocrystalline layer of at least one semiconductive material, having a roughness factor equal to at least 20, and a monolayer of electrically active molecules or of an electrically active polymer, said monolayer being absorbed on the surface of this coating, and in that the device contains at least one auxiliary electrically active compound, possibly dissolved in the electrolyte, having the property of

Abstract: Electrochromic and photoelectrochromic devices using nanocrystalline semiconductor electrodes with a high specific surface area and surface-absorbed electrochromic molecules are disclosed.

Abstract: Electrochromic and photoelectrochromic devices using nanocrystalline semiconductor electrodes with a high specific surface area and surface-absorbed electrochromic molecules are disclosed.