Electrochromic or photoelectrochromic device

PROBLEM TO BE SOLVED: To provide an electrochromic or photoelectrochromic device suitable particularly for reversible storage and display of data and for control of light transmittance. ;SOLUTION: In the device, at least one of 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 adsorbed on the surface of this coating. The device contains at least one auxiliary electrically active compound, possibly dissolved in an electrolyte, having the property of being capable of being oxidized or reduced in a reversible manner. ;COPYRIGHT: (C)2007,JPO&INPIT


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