Preparation method for multi-state electrochromic device

Abstract

The invention relates to a preparation method for a multi-state electrochromic device, which belongs to the technical field of functional materials and devices. The preparation method comprises the following specific steps: 1) preparing electrolyte solution; 2) cutting two transparent conductive substances and a polytetrafluoroethylene plate with the width which is equal to the width of the transparent conductive substances, the length which is 3-7mm less than the length of the transparent conductive substances, and the thickness of 0.3-0.7mm, forming a square through hole in the middle of the polytetrafluoroethylene plate, the distance from the edge of the through hole to the edge of the corresponding polytetrafluoroethylene plate being 3-7 mm, washing and drying for the future use; 3) spin-coating a base metal oxide nano-particle dispersion liquid on one substrate conductive layer, and then sintering; 4) bonding the polytetrafluoroethylene plate on the substrate conductive layers which are not spin-coated, pouring the electrolyte solution in the through hole, then bonding the spin-coated substrate conductive layers towards the through hole, two substrates being staggered at a distance of 3-7mm in a long side direction and completely covering the polytetrafluoroethylene plate, and finally encapsulating by epoxy resin. The electrochromic device prepared by the preparation method disclosed by the invention is capable of realizing transparent, mirror-surface and black three-colour-state reversible conversion.

Description

technical field

[0001] The invention relates to the preparation of a multi-state electrochromic device, belonging to the technical field of functional materials and devices. Background technique

[0002] The electrochromic phenomenon of materials refers to the phenomenon that some materials undergo redox reactions under the action of an applied potential, resulting in reversible changes in their transmittance or reflectance to light. Since Deb used WO in 1969 3 Since the world's first electrochromic device (ECD) was prepared by thin film, electrochromic devices based on various material systems and different structures have been continuously designed. As far as their systems are concerned, they are mainly divided into the following three categories: first The class is to inject or extract ions (mainly Li + 、H + ) to achieve discoloration, such as transition metal oxide WO 3 , NiO, V 2 o 5 、MoO 3 etc. (Crystalline WO 3 Nanoparticles for Highly Improved Electrochromic...

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