A kind of double-layer all-inorganic electrochromic device and preparation method thereof

Abstract

The invention relates to a double-layer all-inorganic electrochromic device and a preparation method thereof. The double-layer all-inorganic electrochromic device comprises a lower isolation layer, a lower ion barrier layer, and a lower transparent conductive layer B arranged sequentially from top to bottom. , lower ion storage layer, lower ion layer, lower electrochromic layer, lower transparent conductive layer A, substrate, upper transparent conductive layer A, upper electrochromic layer, upper ion layer, upper ion storage layer, upper transparent conductive layer B. The upper ion barrier layer and the upper isolation layer; the double-layer all-inorganic electrochromic device can form a double-layer all-inorganic electrochromic device on both sides of the substrate through a double-sided magnetron sputtering coating process. The advantage of the present invention is that: the double-layer all-inorganic electrochromic device of the present invention can adjust the transmittance of visible light to 50% to 0.01%, thereby greatly reducing the transmittance of the colored state and achieving the effect of opacity and privacy ; The present invention adopts the double-sided magnetron sputtering coating process, which is lower in cost than the two coatings.

Description

technical field [0001] The invention belongs to the field of electrochromic devices, in particular to a double-layer all-inorganic electrochromic device and a preparation method thereof. Background technique [0002] Electrochromism refers to the phenomenon that optical properties (reflectivity, transmittance, absorptivity, etc.) undergo a stable and reversible color change under the action of an applied electric field. Electrochromic technology has been developed for more than 40 years. Electrochromic devices (Electrochromic Device, ECD) are widely used in smart windows, It has broad application prospects in fields such as displays, spacecraft temperature control and modulation, automotive non-glare rearview mirrors, and weapons and equipment stealth. [0003] Electrochromic devices generally have a five-layer structure: a transparent conductive electrode layer, an electrochromic material layer, an electrolyte layer, an ion storage layer and another conductive electrode la...

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Problems solved by technology

[0003] Electrochromic devices generally have a five-layer structure: a transparent conductive electrode layer, an electrochromic material layer, an electrolyte layer, an ion storage layer and another conductive electrode layer. For example, patent CN 107085339 A discloses an all-solid-state electrochromic device. Preparation method, wherein, referring to the all-solid-state electrochromic device, the device is sequentially composed of an ITO glass substrate, an electrochromic layer, an electrolyte layer, an ion storage layer and a top layer of ITO, that is, the existing all-solid-state electrochromic device Generally, it is a single-layer all-inorganic electronic color-changing device, and its transmittance is 60%~1%. It is not completely impenetrable to light, and does not have the effect of complete privacy under strong light.

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