Electrochromic or photoelectrochromic device
First Claim
1. A photoelectrochromic device possessing the property of changing color under the effect of an electric voltage and 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 comprising a transparent or translucent substrate bearing an electrically conductive coating, 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 comprising a nanocrystalline layer of at least one semiconductive material, having a roughness factor equal to at least 20, and a monolayer of electrically active molecules, said monolayer being adsorbed on the surface of this coating, and in that the device contains at least one auxiliary electrically active compound, capable of being oxidized or reduced in a reversible manner.
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Accused Products
Abstract
Electrochromic and photoelectrochromic devices using nanocrystalline semiconductor electrodes with a high specific surface area and surface-absorbed electrochromic molecules are disclosed.
87 Citations
23 Claims
- 1. A photoelectrochromic device possessing the property of changing color under the effect of an electric voltage and 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 comprising a transparent or translucent substrate bearing an electrically conductive coating, 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 comprising a nanocrystalline layer of at least one semiconductive material, having a roughness factor equal to at least 20, and a monolayer of electrically active molecules, said monolayer being adsorbed on the surface of this coating, and in that the device contains at least one auxiliary electrically active compound, capable of being oxidized or reduced in a reversible manner.
Specification