Conductive film and electrochromic device comprising same

Abstract

The utility model relates to the technical field of electrochromism technology and transparent conducting film layers, in particular to a conducting film and an electrochromism device comprising the conducting film. The transparent conducting layer is arranged on the transparent substrate layer and comprises a metal grid layer, and the metal grid layer is composed of a plurality of metal grids which are continuously connected; the protective layer is coated on the metal grid layer; the electrochromic device comprises the two conductive films and an electrochromic film layer located between the two conductive films. According to the utility model, the conductivity of the product is greatly improved, and the protective layer well protects the metal grid layer under the protective layer, so that the metal grid layer is prevented from being eroded by a color-changing device under the use conditions of an electric field and strong illumination, the stability of the product is effectively improved, and the service life of the product is effectively prolonged.

Description

Technical Field

[0001] This application relates to the fields of electrochromic technology and transparent conductive film technology, specifically including a conductive film and an electrochromic device containing the conductive film. Background Technology

[0002] Electrochromic technology refers to the microscopic oxidation-reduction reaction that occurs in color-changing materials under the influence of an electric field. The macroscopic result is a reversible change in the device's color and transparency, which can be controlled by the magnitude of the current within the device. Currently, the transparent conductive layer in the industry typically uses indium tin oxide (InTiO2). While InTiO2 has good electrode uniformity, it has high sheet resistance, resulting in slow color-changing speeds in current electrochromic products. Furthermore, InTiO2 is relatively brittle, making it unsuitable for the development, manufacturing, and cost reduction of large-area, large-curvature products. Some industry practices use metal mesh electrodes to improve the color-changing speed, but metal meshes have poor conductivity uniformity, and the transparent, perforated areas are non-conductive, failing to improve the color-changing speed. Moreover, metal meshes are typically made of copper or silver, which are prone to oxidation or ion migration under energized conditions, leading to functional failure. Utility Model Content

[0003] In order to overcome the shortcomings of the prior art, this application proposes to provide a conductive film and an electrochromic device containing the conductive film.

[0004] This application discloses a technical solution as follows: a conductive film, comprising:

[0005] A transparent base layer;

[0006] A transparent conductive layer is disposed on the transparent substrate layer, the transparent conductive layer comprising:

[0007] A metal mesh layer, the metal mesh layer comprising a plurality of continuous metal meshes;

[0008] A protective layer is applied over the metal mesh layer.

[0009] Furthermore, embodiments of this application disclose that electrode leads are disposed around the perimeter of the metal mesh layer.

[0010] Furthermore, embodiments of this application disclose that the cross-section of the metal mesh is one of a square, a rectangle, or a trapezoid.

[0011] Furthermore, embodiments of this application disclose that the area of ​​the protective layer is 1 to 1.2 times the area of ​​the metal mesh layer.

[0012] Furthermore, embodiments of this application disclose that the width of the electrode lead is 10 to 100 times the width of the metal mesh.

[0013] This application also discloses an electrochromic device, comprising:

[0014] Two conductive films as described above;

[0015] An electrochromic film layer located between the two conductive films.

[0016] Furthermore, embodiments of this application also disclose that the electrochromic film layer comprises an ion layer, an electrolyte layer, and a color-changing layer.

[0017] Compared with the prior art, this application has at least the following beneficial effects:

[0018] (1) The area of ​​the transparent conductive protective layer included in this utility model is greater than or equal to the area of ​​the metal mesh layer, thereby protecting the metal mesh layer;

[0019] (2) This utility model combines the high conductivity of metal mesh with the uniformity of transparent conductive film;

[0020] (3) The present invention sets the protective layer on the metal mesh layer, which can effectively protect the metal mesh layer without affecting the optical properties such as transmittance and haze of the two conductive films;

[0021] (4) In addition to the uniformly arranged grid, the metal grid layer of this utility model also has electrode leads around the conductive film to ensure that the current can flow into the grid quickly and evenly, so that the color-changing device can complete the color-changing process quickly and evenly.

[0022] (5) The width of the electrode lead of this utility model is greater than the width of the metal mesh, ensuring that the current can flow into the metal mesh layer quickly. Attached Figure Description

[0023] Figure 1 : A schematic diagram of the structure of a conductive film according to this utility model;

[0024] Figure 2 : A schematic diagram of the structure of an electrochromic device according to this utility model;

[0025] Figure 3 : A schematic diagram showing that the metal mesh layer of this utility model has a square mesh shape;

[0026] Figure 4 : A schematic diagram showing that the metal mesh layer of this utility model has a rhomboid mesh shape;

[0027] Figure 5 : A schematic diagram showing that the metal mesh layer of this utility model has a hexagonal mesh shape;

[0028] Figure 6This is a schematic diagram showing that the metal mesh layer of this utility model has a random pattern of mesh shape.

[0029] Figure 7 : A schematic diagram of the structure of the metal mesh layer of this utility model;

[0030] Figure 8 : A schematic diagram of the cross-section of the metal mesh layer of this utility model;

[0031] Figure 9 Another schematic diagram of the cross-section of the metal mesh layer of this utility model;

[0032] Figure 10 : A schematic diagram of the structure of the protective layer of this utility model;

[0033] Figure 11 Another structural schematic diagram of the protective layer of this utility model;

[0034] Figure 12 Another structural schematic diagram of the protective layer of this utility model;

[0035] In the figure: 1. Transparent substrate layer; 2. Metal mesh layer; 3. Protective layer; 4. Electrochromic film layer; 5. Electrode leads. Detailed Implementation

[0036] To enable those skilled in the art to better understand this utility model, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. The described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present utility model. Example 1

[0037] like Figure 1 As shown, a conductive film includes: a transparent substrate layer 1; a transparent conductive layer disposed on the transparent substrate layer 1, comprising: a metal mesh layer 2, the metal mesh layer 2 including a plurality of continuous metal meshes; and a protective layer 3 coated on the metal mesh layer 2. The transparent substrate layer 1 can be made of PET (polyethylene terephthalate), PC (polycarbonate), PI (polyimide), or COP (cyclic olefin polymer), and its thickness is between 1-1000 μm. The metal mesh layer can be made of copper or nano-silver, and its thickness is between 0.1-100 μm, with a linewidth between 1-100 μm. Figure 3-6As shown, the mesh shape of the metal mesh layer 2 can be a square, rhombus, regular hexagon, random irregular polygon, or other regular polygon, such as... Figure 8-9 As shown, the cross-section of the metal mesh layer 2 is square, rectangular, or trapezoidal.

[0038] A transparent conductive material is coated onto the surface of the metal mesh layer 2 as a protective layer 3. This transparent conductive material can be one or more of various conductive polymers, indium tin oxide, graphene, or carbon nanotubes. The transparent conductive material is applied to the surface of the metal mesh layer using a coating or screen printing process to form a transparent conductive film. This transparent conductive film completely covers the metal mesh layer, forming a protective layer 3. The thickness of the protective layer 3 is between 0.1 and 1 μm.

[0039] like Figure 2 As shown, an electrochromic device includes: two conductive films as described above; and an electrochromic film layer located between the two conductive films. The electrochromic film layer comprises an ion layer, an electrolyte layer, and a color-changing layer. Example 2

[0040] like Figure 7 As shown, the difference from Embodiment 1 is that electrode leads 5 are provided around the metal mesh layer 2, and the width of the electrode leads is 10 times the width of the metal mesh. Example 3

[0041] The difference from Embodiment 2 is that the width of the electrode lead is 100 times the width of the metal mesh. Example 4

[0042] like Figure 10-12 As shown, the difference from Embodiment 1 is that the area of ​​the protective layer 3 is larger than the area of ​​the metal mesh layer 2, and the area of ​​the protective layer 3 is 1.2 times the area of ​​the metal mesh layer 2.

[0043] The embodiments described above are detailed and specific, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the original concept, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A conductive film, characterized in that, include: A transparent base layer; A transparent conductive layer is disposed on the transparent substrate layer, the transparent conductive layer comprising: A metal mesh layer, the metal mesh layer comprising a plurality of continuously connected metal meshes; A protective layer is coated on the metal mesh layer, and the thickness of the protective layer is 0.1-1 μm.

2. The conductive film according to claim 1, characterized in that, Electrode leads are arranged around the metal mesh layer.

3. The conductive film according to claim 1, characterized in that, The cross-section of the metal mesh is one of a square, a rectangle, or a trapezoid.

4. A conductive film according to claim 1, characterized in that, The area of ​​the protective layer is 1 to 1.2 times the area of ​​the metal mesh layer.

5. A conductive film according to claim 2, characterized in that, The width of the electrode lead is 10 to 100 times the width of the metal mesh.

6. A conductive film according to claim 5, characterized in that, The electrode leads and the metal mesh are made of the same metal.

7. An electrochromic device, characterized in that, Include: Two conductive films as described in any one of claims 1-6; and, An electrochromic film layer located between the two conductive films.

8. The electrochromic device according to claim 7, characterized in that, The electrochromic film layer includes an ion layer, an electrolyte layer, and a color-changing layer.

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