Polyacid-based pure inorganic multi-color electrochromic film

Abstract

The invention provides a polyacid-based pure inorganic multi-color electrochromic film. A preparing method of the electrochromic film includes the steps that (1) polyoxometallate is prepared into an aqueous solution A, the pH value of the solution is adjusted to be 2 through hydrochloric acid; (2) the commercial P25 powder TiO2 is prepared into sizing agents B capable of being used for silk-screen printing; (3) silk-screen printing is conducted on a conductive substrate through the sizing agents B so that a TiO2 thin layer can be printed on the surface of the conductive substrate; (4) the conductive substrate with the TiO2 thin layer is placed into the aqueous solution A, and electro-deposition is conducted; (5) the conductive substrate generated after the electro-deposition is conducted is taken out, cleaned through deionized water and ethyl alcohol, and dried through hot air. The hydrosolvent is adopted during the whole preparation process, and the method is environmentally friendly, free of harm to the environment and easy and convenient to operate. The prepared electrochromic film has good optical contrast and multi-color electrochromic performance, and a system for making an electrochromic display is provided.

Description

technical field [0001] The invention relates to an inorganic multi-color electrochromic film, in particular to a polyacid-based pure inorganic multi-color electrochromic film. Background technique [0002] Electrochromic devices can produce coloring and fading under a small applied voltage. Electrochromic devices are used in a wide range of applications, such as: anti-glare rearview mirrors, invisible helmets, and especially displays. Color display is an important prerequisite for electrochromic displays to be widely used. At present, there are certain reports on the production of multi-color electrochromic devices, and the methods can be divided into two categories: 1. Use small organic molecules as electrochromic materials; 2. Use high molecular polymers as electrochromic materials. However, the disadvantage of these two types of electrochromic materials is poor stability. At present, a class of electrochromic materials with better stability is inorganic electrochromic ...

AI Technical Summary

Problems solved by technology

However, the disadvantage of these two types of electrochromic materials is poor stability

At present, a class of electrochromic materials with better stability is inorganic electrochromic materials. Inorganic electrochromic materials have a single component and good color changing performance. The only disadvantage is that the color change is single.

In order to break the status quo of single discoloration, an effective method is to make a composite film of organic small molecules or high molecular polymers and inorganic oxides. Although the composite film has a multi-color display, its long-term stability is still limited. Stability of organic components

Therefore, it is a challenge to develop purely inorganic multi-color electrochromic materials.

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