Electrochromic device and method for manufacturing the same
By screen printing a peelable adhesive onto glass and cutting it to form the area to be coated, and then depositing a metal electrode and an ITO conductive layer, the problems of electrode conductivity and color uniformity in small-sized electrochromic products are solved, achieving low-cost and high-efficiency preparation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- NINGBO HUALING OPTICAL TECH CO LTD
- Filing Date
- 2022-11-07
- Publication Date
- 2026-07-21
AI Technical Summary
Existing technologies struggle to achieve uniform electrode conductivity and color-changing effects in small-sized electrochromic products. Traditional metal PIN electrodes cannot be effectively connected in small products, and their manufacturing costs and difficulties are high.
The process involves screen printing a peelable adhesive onto glass to form a peelable adhesive layer, cutting to create areas to be coated and areas not to be coated, depositing a metal electrode layer and an ITO conductive layer, forming a sealed cavity with sealant, and filling it with a color-changing solution to ensure uniform electrode conductivity.
This technology enables smaller electrochromic products to have better electrode conductivity, more uniform color-changing effects, and lower manufacturing costs and difficulty.
Smart Images
Figure CN115657387B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of optoelectronic technology, and more specifically, to an electrochromic device and its fabrication method. Background Technology
[0002] Electrochromism refers to the phenomenon where the electronic structure and optical properties (reflectivity, transmittance, absorptivity, etc.) of electrochromic materials undergo stable and reversible changes under the influence of an applied electric field or current, manifesting as reversible changes in color and transparency. Electrochromic devices made from electrochromic materials are widely used in smart windows, displays, imaging equipment, and more.
[0003] Depending on the technological approach, electrochromism can be categorized into organic electrochromism, inorganic all-solid-state electrochromism, and organic-inorganic composite electrochromism. Based on the molecular weight of the color-changing material, organic electrochromism can be further divided into small-molecule organic electrochromism and polymer electrochromism. Among these, the small-molecule organic electrochromic device has a sandwich structure, consisting of, from top to bottom, conductive glass, an electrochromic solution layer (surrounded by adhesive to prevent solution overflow), and then another layer of conductive glass.
[0004] Because the color-changing voltage of organic small molecule electrochromic products is very low (usually less than 2V), in large-size color-changing products, considering the voltage reduction caused by the resistance of conductive glass, different positions may have different color-changing effects due to different voltages. Therefore, an electrode material with very high conductivity is needed so that the voltage applied to the product can present a one-dimensional diffusion from line to surface as much as possible, rather than a two-dimensional diffusion from point to surface.
[0005] Currently, commercially available electrochromic products (such as electrochromic smart dimming glass and automotive auto-dimming rearview mirrors) are all large-sized devices. Due to sufficient space, the electrodes can be connected to an external power source via metal pin electrodes to apply electricity and change or fade the color. However, for small-sized electrochromic products (e.g., those with an area more than two orders of magnitude smaller than a car rearview mirror and a size of 1 cm), the challenge lies in addressing this issue. 2 The following products cannot be connected to metal PIN electrodes. This is mainly due to the following limitations: 1. Limited product space; 2. Metal PIN electrodes take up too much space and affect the appearance; 3. There is no space to hold the metal PIN electrode when the two conductive glass pieces overlap. Summary of the Invention
[0006] The purpose of this invention is to provide an electrochromic device and its preparation method, which can simultaneously meet the requirements of small product size and better electrode conductivity, and has the advantages of low manufacturing cost and difficulty.
[0007] The embodiments of the present invention are implemented as follows:
[0008] One aspect of this invention provides a method for fabricating an electrochromic device, comprising: screen printing a peelable adhesive onto glass and curing the peelable adhesive to form a peelable adhesive layer; cutting the peelable adhesive layer according to a preset shape and removing the cut peelable adhesive layer to form a coating area on the glass, while retaining the peelable adhesive layer other than the cut peelable adhesive layer to form a non-coating area on the glass; depositing a metal electrode layer in the coating area of the glass; removing the peelable adhesive layer in the non-coating area; depositing an ITO conductive layer on the glass with the metal electrode layer to form conductive glass; arranging two pieces of conductive glass facing each other and spaced apart; applying a sealant to the ITO conductive layers of the two pieces of conductive glass to form a sealed cavity between the two pieces of conductive glass; and filling the sealed cavity with a color-changing solution.
[0009] As one possible approach, depositing a metal electrode layer in the area of the glass to be coated includes: sequentially depositing a Cu film layer, a Ni film layer, a Pd film layer, and an Au film layer in the area of the glass to be coated by magnetron sputtering or electrochemical deposition to form a metal electrode layer.
[0010] As one possible implementation, the thickness of the Cu film is between 50 and 500 nm, the thickness of the Ni film is between 500 and 5000 nm, the thickness of the Pd film is between 10 and 100 nm, and the thickness of the Au film is between 10 and 100 nm.
[0011] As one feasible approach, the method further includes: depositing a SiO2 film layer in the glass area to be coated by magnetron sputtering between cutting the peelable adhesive layer according to a preset shape and depositing the metal electrode layer in the glass area to be coated.
[0012] As one possible approach, the thickness of the SiO2 film is between 20 and 200 nm.
[0013] As one possible approach, the thickness of the ITO conductive layer is between 20 and 200 nm.
[0014] As one possible approach, prior to screen printing the peelable adhesive onto the glass, the method further includes cleaning the glass using ultrasonic cleaning.
[0015] As one possible approach, the glass is electronic-grade soda-lime glass or aluminosilicate glass.
[0016] As one possible approach, the peelable adhesive is a thermosetting peelable adhesive or a UV-curing peelable adhesive.
[0017] In another aspect of the present invention, an electrochromic device is provided, comprising two conductive glasses arranged opposite to each other and spaced apart. Each conductive glass comprises glass, and a metal electrode layer and an ITO conductive layer sequentially disposed on the glass. The metal electrode layer is used to connect to an external power source. A sealant is disposed on the ITO conductive layer of the two conductive glasses to form a sealed cavity between the two conductive glasses. The sealed cavity is filled with a color-changing solution.
[0018] The beneficial effects of the embodiments of the present invention include:
[0019] The method for fabricating this electrochromic device includes: screen printing a peelable adhesive onto glass and curing the peelable adhesive to form a peelable layer to isolate and protect the glass surface; cutting the peelable layer according to a preset shape and removing the cut peelable layer to form a coating area on the glass, while retaining the peelable layer other than the cut peelable layer to form a non-coating area on the glass, thereby exposing the glass surface in the coating area and continuing to shield the glass surface in the non-coating area; and depositing gold in the coating area of the glass. The electrochromic device comprises two conductive glass plates arranged opposite each other. The plates are connected to the positive and negative electrodes respectively via metal electrode layers on opposite sides of the sealed cavity. The two metal electrode layers are in contact with the color-changing solution through corresponding ITO conductive layers. Because the ITO conductive layers have uniform conductivity, the voltage across the color-changing solution is uniform, thus improving the color-changing effect of the electrochromic device. This design simultaneously meets the requirements of smaller product size and better electrode conductivity, offering advantages in terms of lower manufacturing cost and difficulty. Attached Figure Description
[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 This is one of the flowcharts for a method of preparing an electrochromic device according to an embodiment of the present invention;
[0022] Figure 2 The second flowchart illustrates the method for fabricating an electrochromic device according to an embodiment of the present invention.
[0023] Figure 3 The third flowchart illustrates the method for fabricating an electrochromic device according to an embodiment of the present invention.
[0024] Figure 4 This is one of the structural schematic diagrams of the electrochromic device provided in the embodiments of the present invention;
[0025] Figure 5 This is a second schematic diagram of the electrochromic device provided in an embodiment of the present invention.
[0026] Icons: 100-Electrochromic device; 10-Conductive glass; 11-Glass; 12-SiO2 film; 13-Metal electrode layer; 131-Cu film; 132-Ni film; 133-Pd film; 134-Au film; 14-ITO conductive layer; 20-Sealant; 30-Color-changing solution. Detailed Implementation
[0027] The embodiments described below represent the information necessary for those skilled in the art to practice the embodiments and illustrate the best mode for practicing the embodiments. After reading the following description with reference to the accompanying drawings, those skilled in the art will understand the concepts of this disclosure and will recognize the application of these concepts not specifically set forth herein. It should be understood that these concepts and applications fall within the scope of this disclosure and the appended claims.
[0028] It should be understood that while the terms first, second, etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. For example, without departing from the scope of this disclosure, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.
[0029] It should be understood that when an element (such as a layer, region, or substrate) is referred to as "on another element" or "extending to another element," it may be directly on or directly extended to the other element, or there may be an intermediate element. Conversely, when an element is referred to as "directly on another element" or "directly extending to another element," there is no intermediate element. Similarly, it should be understood that when an element (such as a layer, region, or substrate) is referred to as "above another element" or "extending above another element," it may be directly on or directly extended to the other element, or there may be an intermediate element. Conversely, when an element is referred to as "directly on another element" or "extending directly to another element," there is no intermediate element. It should also be understood that when an element is referred to as "connected" or "coupled" to another element, it may be directly connected or coupled to the other element, or there may be an intermediate element. Conversely, when an element is referred to as "directly connected" or "directly coupled" to another element, there is no intermediate element.
[0030] Related terms such as “below”, “above”, “upper”, “lower”, “horizontal”, or “vertical” are used in this document to describe the relationship between one element, layer, or region and another element, layer, or region, as shown in the figure.
[0031] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this disclosure. As used herein, the singular forms “a,” “an,” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that, when used herein, the term “comprising” indicates the presence of the stated feature, integer, step, operation, element, and / or component, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups of the foregoing.
[0032] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. It should also be understood that the terms used herein should be interpreted as having the same meaning as they would in the context of this specification and the relevant field, and not in an idealized or overly formal sense, unless expressly defined herein.
[0033] Electrochromic products require high conductivity of electrodes. Existing electrochromic products are all medium to large in size, with the smallest being about the size of a car rearview mirror. Small-sized electrochromic products, such as those with an area two orders of magnitude smaller than a car rearview mirror, cannot be manufactured using traditional processes. The main reason is the limited space and the large electrodes required; conventional metal PIN electrodes or silver paste electrodes are clearly insufficient for fabrication up to 1 cm. 2 Small and exquisite products in the following sizes.
[0034] To solve the above problems, please refer to the following: Figures 1 to 5 This application provides an electrochromic device 100 and its preparation method, which can simultaneously meet the requirements of smaller product size and better electrode conductivity, and has the advantages of lower manufacturing cost and difficulty.
[0035] Specifically, such as Figure 1 As shown, the method for fabricating the electrochromic device 100 includes:
[0036] S110. Screen print the peelable adhesive on the glass 11 and cure the peelable adhesive to form a peelable adhesive layer;
[0037] It should be noted that peelable adhesive, or removable protective adhesive, possesses strong water resistance, oil resistance, corrosion resistance, and insulation properties. After being sprayed onto the surface of an object, it forms a peelable film that effectively isolates the object, achieving the ideal state of preventing dirt, rust, acids and alkalis, scratches, and allowing for easy removal and repair. Figure 1 As shown, in this embodiment, by screen printing a peelable adhesive onto the glass 11 and curing the adhesive to form a peelable layer, the surface of the glass 11 can be isolated and protected. This also facilitates the subsequent partitioning of the glass 11 surface in S210, dividing the surface into a coating area and a non-coating area. As one possible implementation method, the peelable adhesive can be a thermosetting peelable adhesive or a UV-curable peelable adhesive. Those skilled in the art should be able to make reasonable selections and designs based on actual conditions; no specific limitations are imposed here.
[0038] S210. Cut the peelable adhesive layer according to the preset shape, and remove the cut peelable adhesive layer to form a coating area on the glass 11. Leave the peelable adhesive layer other than the cut peelable adhesive layer to form a non-coating area on the glass 11.
[0039] It should be noted that the preset shape, i.e., the actual shape of the electrode, should be reasonably selected and designed by those skilled in the art based on the actual situation; no specific limitations are imposed here. For example, such as... Figure 5As shown, in this embodiment, the actual shape of the glass 11 is circular, and the actual shape of the electrode is annular. The electrode and the glass 11 are concentrically arranged, and the electrode is arranged around the outer periphery of the glass 11. In the actual manufacturing process, the peelable adhesive layer can be cut using an ultraviolet laser cutting device to divide the surface of the glass 11 into a coating area and a non-coating area. The coating area refers to the area used to form the electrode, and the non-coating area refers to the area other than the coating area. It should be noted that only the peelable adhesive layer needs to be cut during cutting to avoid damaging the glass 11.
[0040] S310. A metal electrode layer 13 is deposited in the area of glass 11 to be coated.
[0041] It should be noted that after dividing the surface of the glass 11 into a coating area and a non-coating area in the aforementioned S210, and removing the peelable adhesive layer in the coating area and retaining the peelable adhesive layer in the non-coating area, the surface of the glass 11 in the coating area can be exposed, while the surface of the glass 11 in the non-coating area can continue to be covered. This allows the peelable adhesive layer in the non-coating area to continue to isolate and protect the glass 11 in the non-coating area. In this way, the coating operation of depositing the metal electrode layer 13 on the surface of the glass 11 in the coating area can be performed in S310, so that the electrochromic device 100 can be connected to an external power source through the metal electrode layer 13.
[0042] S410. Remove the peelable adhesive layer in the non-coated area;
[0043] S510. An ITO conductive layer 14 is deposited on the glass 11 on which the metal electrode layer 13 is deposited to form a conductive glass 10.
[0044] It should be noted that after the peelable adhesive layer in the non-coated area is removed in the aforementioned S410, the surface of the glass 11 located in the non-coated area can be exposed. Together with the surface of the glass 11 located in the coated area in S310 that has been coated with the metal electrode layer 13, an ITO conductive layer 14 is coated on the whole formed by the two (or the glass 11 coated with the metal electrode layer 13), so that the metal electrode layer 13 contacts the ITO conductive layer 14, thereby enabling the metal electrode layer 13 to be electrically connected to the ITO conductive layer 14. In this process, the ITO (indium tin oxide) conductive layer possesses both electrical conductivity and optical transparency, facilitating contact between the ITO conductive layer 14 and the color-changing solution 30 in subsequent steps S710 and S810. This ensures uniform voltage distribution throughout the color-changing solution 30. Both the glass 11 and the ITO conductive layer 14 are transparent, while the metal electrode layer 13 is opaque. Therefore, the ITO conductive layer 14 is uniformly deposited on the surface of the glass 11, resulting in a conductive glass 10 that is transparent except for the portion corresponding to the metal electrode layer 13. This partially transparent conductive glass 10 allows the color of the color-changing solution 30 to be clearly visible, thereby improving the color-changing effect of the electrochromic device 100. As one feasible approach, the thickness of the ITO conductive layer 14 is between 20 and 200 nm. Those skilled in the art should be able to reasonably select and design the actual thickness of the ITO conductive layer 14 based on specific circumstances; no specific limitations are imposed here.
[0045] S610, Place the two conductive glass pieces 10 opposite each other and spaced apart;
[0046] S710. Apply sealant 20 to the ITO conductive layer 14 of the two conductive glass pieces 10 to form a sealed cavity between the two conductive glass pieces 10.
[0047] It should be noted that, for example, such as Figure 4 As shown, in this embodiment, two conductive glass pieces 10 of the same size are provided and arranged opposite each other with a gap. The ITO conductive layers 14 of the two conductive glass pieces 10 should be close to each other, and the glass 11 of the two conductive glass pieces 10 should be away from each other, so that sealant 20 can be applied to the ITO conductive layers 14 of the two conductive glass pieces 10, thereby sealing and fixing the two conductive glass pieces 10 together, and forming a sealed cavity between the ITO conductive layers 14 of the two conductive glass pieces 10. It should be noted that the thickness of the sealant 20 at any position along the connecting direction of the two conductive glass pieces 10 should be consistent so that the two conductive glass pieces 10 can be parallel to each other.
[0048] S810. Fill the sealed cavity with 30g of color-changing solution.
[0049] It should be noted that, for example, such as Figure 4 As shown, in this embodiment, the sealed cavity formed in S710 is used to fill the color-changing solution 30. The color-changing solution 30 is an electrochromic material. The electronic structure and optical properties (reflectivity, transmittance, absorptivity, etc.) of the color-changing solution 30 undergo stable and reversible changes under the action of an applied electric field or current, manifesting as reversible changes in color and transparency. Of course, in other embodiments, the sealed cavity can also be filled with other electrochromic materials, not limited to the color-changing solution 30. Those skilled in the art should be able to make reasonable selections and designs according to actual conditions; no specific limitations are made here.
[0050] The metal electrode layers 13 of the two conductive glass pieces 10 located on opposite sides of the sealed cavity are connected to the positive and negative electrodes, respectively. The two metal electrode layers 13 are in contact with the color-changing solution 30 through corresponding ITO conductive layers 14. Since the conductivity of the ITO conductive layers 14 is uniform, the voltage magnitude of the color-changing solution 30 can be made uniform throughout, thereby improving the color-changing effect of the electrochromic device 100. It should be noted that the two conductive glass pieces 10 are arranged in parallel to ensure that the distance between the color-changing solution 30 and the metal electrode layers 13 connecting the positive and negative electrodes is equal, so that the electrochromic device 100 can achieve uniform color changing, thus resulting in the glass 11 exhibiting a uniform color appearance.
[0051] As one feasible method, S310, depositing the metal electrode layer 13 in the area to be coated on the glass 11 includes: sequentially depositing a Cu film layer 131, a Ni film layer 132, a Pd film layer 133, and an Au film layer 134 in the area to be coated on the glass 11 by magnetron sputtering or electrochemical deposition to form the metal electrode layer 13. As one feasible method, the thickness of the Cu film layer 131 is between 50 and 500 nm, the thickness of the Ni film layer 132 is between 500 and 5000 nm, the thickness of the Pd film layer 133 is between 10 and 100 nm, and the thickness of the Au film layer 134 is between 10 and 100 nm. Those skilled in the art should be able to make reasonable selections and designs regarding the actual thicknesses of the Cu film layer 131, Ni film layer 132, Pd film layer 133, and Au film layer 134 according to the actual situation; no specific limitations are imposed here.
[0052] like Figure 2As shown, in one feasible manner, between S210, cutting the peelable adhesive layer according to a preset shape, and S310, depositing the metal electrode layer 13 in the area to be coated on the glass 11, the method further includes: S910, depositing a SiO2 film layer 12 in the area to be coated on the glass 11 by magnetron sputtering. In one feasible manner, the thickness of the SiO2 film layer 12 is between 20 and 200 nm. Regarding the actual thickness of the SiO2 film layer 12, those skilled in the art should be able to make reasonable selections and designs based on actual conditions; no specific limitations are made here.
[0053] It should be noted that, due to the relatively stable chemical properties of SiO2, which does not react with water, and possesses high fire resistance, high temperature resistance, low coefficient of thermal expansion, high insulation, corrosion resistance, piezoelectric effect, resonance effect, and unique optical properties, when the surface of glass 11 is divided into a coating area and a non-coating area in the aforementioned S210, and the peelable adhesive layer in the coating area is removed while the peelable adhesive layer in the non-coating area is retained, a SiO2 film layer 12 can be deposited on the surface of glass 11 located in the coating area to isolate and protect the glass 11. Then, a metal electrode layer 13 can be deposited on the surface of glass 11 with the SiO2 film layer 12 deposited on it.
[0054] like Figure 3 As shown, as an implementable method, before screen printing the peelable adhesive on the glass 11 in step S110, the method further includes: S010, cleaning the glass 11 by ultrasonic cleaning. For example, in this embodiment, the glass 11 can be ultrasonically cleaned using an ultrasonic cleaner to thoroughly clean its surface, thereby improving the coating effect and thus the color-changing effect. Furthermore, it allows for large-scale cleaning at once, thereby improving cleaning efficiency and ultimately increasing production efficiency.
[0055] As one feasible approach, glass 11 can be electronic-grade soda-lime glass 11 or aluminosilicate glass 11. Soda-lime glass 11, a type of silicate glass 11, is mainly composed of silicon dioxide (SiO2), calcium oxide (CaO), and sodium oxide (Na2O), possessing advantages such as good chemical stability, mechanical strength, and a low coefficient of thermal expansion. Aluminosilicate glass 11, mainly composed of lithium oxide (Li2O), aluminum oxide (Al2O3), and silicon dioxide (SiO2), is produced using a rolling process and features high transparency and suitability for chemical tempering. Compared to traditional soda-lime glass 11, aluminosilicate glass 11 exhibits better physical and chemical properties (including but not limited to better chemical stability and mechanical strength, and a lower coefficient of thermal expansion).
[0056] like Figure 4 and Figure 5As shown, in another aspect of this embodiment, an electrochromic device 100 is provided. The electrochromic device 100 includes two conductive glass 10s arranged opposite to each other and spaced apart. Each conductive glass 10 includes a glass 11, and a metal electrode layer 13 and an ITO conductive layer 14 sequentially disposed on the glass 11. The metal electrode layer 13 is used for connecting an external power source. A sealant 20 is disposed on the ITO conductive layer 14 of the two conductive glass 10s to form a sealed cavity between the two conductive glass 10s. The sealed cavity is filled with a color-changing solution 30.
[0057] It should be noted that the specific structure of the electrochromic device 100 provided in this embodiment is the same as the preparation method of the electrochromic device 100 described above. Those skilled in the art can deduce the specific structure of the electrochromic device 100 based on the description of the preparation method of the electrochromic device 100 described above, and this application will not repeat the description. Since the electrochromic device 100 provided in this embodiment is prepared using the above-described preparation method of the electrochromic device 100, it has the same beneficial effects as the above-described preparation method of the electrochromic device 100, and will not be described again here.
[0058] The above description is merely an optional embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
[0059] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.
Claims
1. A method for fabricating an electrochromic device, characterized in that, The method includes: A peelable adhesive is screen-printed onto glass, and the peelable adhesive is cured to form a peelable adhesive layer; The peelable adhesive layer is cut according to a preset shape, and the cut peelable adhesive layer is removed to form a coating area on the glass, while the peelable adhesive layer other than the cut peelable adhesive layer is retained to form a non-coating area on the glass. A SiO2 film is deposited in the area of the glass to be coated by magnetron sputtering. A metal electrode layer is deposited in the area of the glass to be coated; Remove the peelable adhesive layer in the non-coated area; An ITO conductive layer is deposited on the glass on which the metal electrode layer is deposited to form conductive glass; The two pieces of conductive glass are placed opposite each other and spaced apart. A sealant is applied to the ITO conductive layer of the two conductive glass pieces to form a sealed cavity between the two conductive glass pieces; The sealed cavity is filled with a color-changing solution; Wherein, depositing a metal electrode layer in the area of the glass to be coated includes: In the area of the glass to be coated, Cu film, Ni film, Pd film and Au film are deposited sequentially by magnetron sputtering or electrochemical deposition to form a metal electrode layer.
2. The method for preparing the electrochromic device according to claim 1, characterized in that, The thickness of the Cu film is between 50 and 500 nm, the thickness of the Ni film is between 500 and 5000 nm, the thickness of the Pd film is between 10 and 100 nm, and the thickness of the Au film is between 10 and 100 nm.
3. The method for preparing the electrochromic device according to claim 1, characterized in that, The thickness of the SiO2 film is between 20 and 200 nm.
4. The method for preparing the electrochromic device according to claim 1, characterized in that, The thickness of the ITO conductive layer is between 20 and 200 nm.
5. The method for preparing the electrochromic device according to claim 1, characterized in that, Prior to screen printing the peelable adhesive on the glass, the method further includes: The glass is cleaned using ultrasonic cleaning.
6. The method for preparing the electrochromic device according to claim 1, characterized in that, The glass is electronic grade soda-lime glass or aluminosilicate glass.
7. The method for preparing the electrochromic device according to claim 1, characterized in that, The peelable adhesive is a thermosetting peelable adhesive or a UV-curing peelable adhesive.
8. An electrochromic device, prepared by the method for preparing an electrochromic device according to any one of claims 1 to 7, characterized in that, The device includes two conductive glass pieces arranged opposite each other and spaced apart. Each conductive glass piece includes glass, a metal electrode layer and an ITO conductive layer sequentially disposed on the glass. The metal electrode layer is used to connect to an external power source. A sealant is disposed on the ITO conductive layer of the two conductive glass pieces to form a sealed cavity between the two conductive glass pieces. The sealed cavity is filled with a color-changing solution.