A preparation method of cobalt oxide all-solid electrochromic glass and its products

Abstract

The invention provides a preparation method for cobalt oxide all-solid-state electrochromic glass. The preparation method comprises the following steps of firstly, sequentially depositing a first transparent conducting layer, a cobalt oxide layer, a metallic lithium layer and a second transparent conducting layer on a transparent substrate to obtain a cobalt oxide electrochromic glass specimen; secondly, placing the cobalt oxide electrochromic glass specimen on a substrate base in an evaporation cavity of a pulse laser focusing system, performing laser focusing on the specimen by adopting pulse laser, and aligning to a jointing line of the cobalt oxide layer and the metallic lithium layer on the specimen by a laser beam for reciprocated scanning for more than one time; thirdly, after scanning, closing laser; after cooling the specimen until the temperature is below 100DEG C, introducing inert gases for breaking vacuum, taking out the specimen to obtain a finished cobalt oxide electrochromic glass product. According to the cobalt oxide all-solid-state electrochromic glass prepared by the preparation method provided by the invention, the defects of low visible light transmission and low electrochromic speed existing in the prior art can be overcome.

Description

technical field [0001] The invention belongs to the field of preparation technology of all-solid electrochromic glass, in particular to a preparation method of cobalt oxide all-solid electrochromic glass and its products. Background technique [0002] Electrochromic (Electrochromic, EC) refers to the phenomenon that the optical properties of materials undergo continuous and reversible changes under the action of an external electric field, which is intuitively manifested as a process in which the color and transparency of materials undergo reversible changes. Electrochromic materials are classified into inorganic electrochromic materials and organic electrochromic materials. [0003] Inorganic electrochromic materials are almost all transition metal oxides. Due to the instability of the electronic layer structure of metal ions in transition metal oxide tungsten, the valence state undergoes reversible change under certain conditions, forming a coexistence state of mixed valen...

AI Technical Summary

Problems solved by technology

[0005] However, due to the existing cobalt oxide all-solid-state electrochromic glass, the electrochromic layer (CoO x The thickness of the electrolyte layer (metal Li layer) is generally 300-1000nm, and the thickness of the electrolyte layer (metal Li layer) is generally 150-200nm. The thickness of the electrolyte layer is relatively thick, resulting in a low electrochromic speed, and the transparency of the electrolyte layer is limited. The penetration of visible light is low. When users look directly at the glass, they will feel that there is a layer of things blocking their eyes. The contrast of objects and the saturation of colors will be reduced, which will greatly affect the visual perception.

In addition, due to the larger energy gap of oxides and larger energy gaps of metals, the CoO x There will be an obvious interface between the metal lithium layer and the metal lithium layer, so that lithium ions need to cross the energy level formed by this interface when diffusing, which greatly reduces the electrochromic speed of the product.