Electrochemical doping method for electrochromic thin film

Abstract

The invention belongs to the electrochromic thin film preparation technologies, and relates to an electrochemical doping method for an electrochromic thin film. The steps for electrochemical doping comprise preparation of the electrochromic thin film, preparation of doped liquid, preparation before doping and process of doping. According to the electrochemical doping method for the electrochromic thin film, high-proportion doping is achieved; deposit cannot be generated in the doping process so that the uniformity of the doped thin film can be ensured; and when multi-component doping is conducted, the experimental process is simplified, expensive experimental equipment is omitted, and therefore the doping cost is reduced.

Description

technical field [0001] The invention belongs to the preparation technology of electrochromic thin films, and relates to an electrochemical doping method of electrochromic thin films. Background technique [0002] Electrochromic (EC) materials are characterized in that their optical properties change reversibly and persistently under the drive of external voltage. This function enables electrochromic materials to be applied in many fields. Its main application has changed over the years, from displays to smart windows, and research in the field of devices has promoted the development of electrochromic technology. [0003] Electrochromic materials generally exist in the form of thin films in devices, and the discoloration process is accompanied by redox reactions, which involve a large amount of lithium ion intercalation and extraction, which will have a serious impact on the structure of the material and reduce the discoloration properties of the material, resulting in The ...

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Problems solved by technology

The disadvantage of the above-mentioned preparation method is: the thin film doped by wet chemical method is generally used, and the composite solution is mainly prepared by sol-gel, and then the film is prepared. In the process of preparing the solution, the solution will produce precipitation with the increase of the doping ratio. Once the precipitation is generated, it is difficult to prepare a uniform film; or the sputtering method is used to dope the electrochromic film. This method is difficult to control the proportion of doping elements in the experimental process, and the preparation process is cumbersome and complicated. In addition, some Doping elements or multiple doping is difficult to achieve by sputtering; other methods can also be used to dope electrochromic films, such as physical vapor deposition, chemical vapor deposition, hydrothermal growth, etc., but these technical means need to use special Equipment, or harsh experimental conditions, or precipitation

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