Preparation method of novel fast-response high-contrast electrochromic device

Abstract

The invention relates to a preparation method of a novel electrochromic device. The method changes the conventional design mode of the electrochromic device (namely the device is required to simultaneously comprise different cathodochromic and anodic color-changing material layers). Only one color-changing material (or simultaneously cathode coloring or simultaneously anode coloring material) is used during preparation of the device, so that a homopolar coloring material adhered to a transparent substrate is connected to one side in parallel and is conducted with a middle layer to form two parallel current circuits; thus, the problem that the color-changing material cannot be used for preparing the device is solved, the contrast of the device is increased, the response is fast and the method has wide applicability.

Description

Technical field: [0001] The invention relates to a method for preparing a novel electrochromic device. Background technique: [0002] Electrochromic (EC) material means that under the action of an external electric field, the material undergoes a redox reaction. Due to the change of its microstructure, the optical properties of the material (including transmittance, emissivity, and absorptivity) are in ultraviolet, visible or The infrared band has the property of reversible change. Electrochromic materials are divided into organic and inorganic systems according to their composition. Common inorganic electrochromic materials are WO 3 , NiO, V 2 O 5 , MoO, TiO 2 And other transition metal oxides and their derivatives. Organic electrochromic materials include small organic molecules such as viologen and conductive polymers such as polythiophene, polyaniline, and polypyrrole. Inorganic electrochromic materials have good cycle stability and excellent contrast, but their energy con...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above-mentioned problem that the homopolar color-changing material cannot be formed into pieces, the present invention designs an electrochromic device with a new structure. The preparation method of the electrochromic device is: depositing the electrochromic material on two transparent electrodes respectively , place one of the transparent electrodes with a color-changing material on the bottom, scrape-coat the configured sol transparent electrolyte on it, place a double-sided conductive transparent electrode and lead out the wires on both sides, and again on the other side of the transparent electrode Scrape-coat the sol transparent electrolyte, and finally put another layer of transparent electrode deposited with electrochromic material on the top. The wires are connected in parallel as the negative pole, forming two parallel discoloration circuits

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