Fiber-shaped flexible electrochromic device and preparation method thereof

Abstract

The invention discloses a fiber-shaped flexible electrochromic device comprising a transparent polymer protection layer, a silver wire counter electrode, an electrochromic layer, a transparent conductive layer and a core material. The invention further discloses a preparation method of the fiber-shaped flexible electrochromic device. The method comprises the following steps of: forming the transparent conductive layer on the surface of the core material by utilizing a thermal evaporation method or an ion sputtering method; forming the electrochromic layer on the transparent conductive layer by utilizing a coating method, a solution Czochralski method or an electric deposition method; coating a gel polyelectrolyte on the surface of the electrochromic layer to form a polyelectrolyte layer; placing the silver wire counter electrode into the polyelectrolyte layer which is parallel to the core material; and then, covering a transparent polymer protection layer on the outer surface of the polyelectrolyte layer, and carrying out heat seal treatment to obtain the device. According to the fiber-shaped flexible electrochromic device and the preparation method disclosed by the invention, the process is simple and the prepared fiber-shaped flexible electrochromic device is a flexible and bendable fiber-shaped abnormal structure; and the fiber-shaped flexible electrochromic device can be used as an assembling unit of a more complicated abnormal structure device, and a method foundation for assembling the other abnormal structure devices is provided.

Description

technical field [0001] The invention belongs to the technical field of electrochromic devices, and in particular relates to a fibrous flexible electrochromic device and a preparation method thereof. Background technique [0002] The optical properties (color, transparency, reflectivity, etc.) of electrochromic materials can be reversibly changed under an applied electric field. Due to the characteristics of low operating voltage, no need for backlight, low energy consumption, low cost, and the ability to produce large-area and special-shaped structural devices, electrochromic devices are widely used in display devices, smart windows, military camouflage, and anti-glare automotive rearview mirrors. It has broad application prospects. [0003] Existing electrochromic devices mainly have a sandwich structure, and the sandwich structure is composed of two layers of transparent electrodes, an electrochromic layer and an electrolyte layer sandwiched between the two layers of tran...

AI Technical Summary

Problems solved by technology

Generally speaking, inorganic color-changing materials have high stability, but the color-changing speed is slow and the processing cost is high; organic color-changing materials have rich colors, fast color changing, easy processing and low driving voltage, save energy, and keep changing color even after power off effect, with memory function

Liquid electrolyte can give a fast response speed, but the device is not easy to package, and electrolyte leakage is prone to occur; solid electrolyte is the opposite; relatively speaking, gel electrolyte is widely used because it combines the advantages of both and abandons their respective shortcomings.

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