High-transmittance electrochromic assembly
By introducing a specific structured transmissive layer into the all-solid-state electrochromic component, the problem of limited transmittance regulation amplitude is solved, and the transmittance increase of the high-transmissive electrochromic component in the faded state is achieved, and the transmittance variation range is expanded.
Patent Information
- Application Number
- CN202422202389.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-09
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-09-09
AI Technical Summary
The transmittance regulation range of all-solid-state electrochromic devices is limited, and the transmittance change range cannot reach more than 70%.
Based on the existing all-solid-state electrochromic component structure, the transmissive layer of a specific structure is introduced. The transmissive layer consists of alternately stacked low-refractive index layers and high-refractive index layers to ensure that the refractive index of the low-refractive index layer is less than that of the adjacent high-refractive index layers, and the thickness and material of each layer are appropriate to improve the faded transmittance.
The transmittance of electrochromic components in the faded state is greatly improved, and the transmittance variation range of all solid electrochromic components is expanded.
Smart Images
Figure CN223092265U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of electrochromic devices and relates to an electrochromic component with high transmittance. Background Technique
[0002] Electrochromism is a phenomenon in which the optical properties (reflectivity, transmittance, absorbance, etc.) of a material undergo stable and reversible color changes under the action of an external electric field, and it appears as reversible changes in color and transparency on the appearance. Materials with electrochromic properties are called electrochromic materials. Electrochromic materials undergo electrochemical oxidation-reduction reactions under the action of an external electric field, gain or lose electrons, and cause the color of the materials to change.
[0003] A device made of electrochromic materials is called an electrochromic device. A fully solid-state electrochromic device usually consists of five layers of thin films, namely: a transparent conductive layer, an ion storage layer, an ion conduction layer, an electrochromic layer, and a transparent conductive layer. When the electrochromic device works, a certain voltage is applied between the two transparent conductive layers. The electrochromic layer material undergoes an oxidation-reduction reaction under the action of the voltage, and the color changes; while the ion conduction layer is composed of special conductive materials, such as solutions or solid electrolyte materials containing lithium perchlorate, sodium perchlorate, etc.; the ion storage layer plays a role in storing corresponding counterions when the electrochromic material undergoes an oxidation-reduction reaction to maintain the charge balance of the entire system. The ion storage layer can also be an electrochromic material with a color-changing performance opposite to that of the previous electrochromic material layer, which can play a role in color superimposition or complementation. For example, if the electrochromic layer material uses an anodized color-changing material, the ion storage layer can use a cathodic reduction color-changing material.
[0004] However, the regulation range of the transmittance of the fully solid-state electrochromic device is relatively limited by the characteristics and stacking order of the film layer stacking materials used, and the change range of the transmittance generally cannot reach more than 70%, and the transmittance is relatively low.
[0005] In summary, providing an electrochromic component with high transmittance, improving the transmittance of the device in the faded state, and further improving the transmittance change range of the fully solid-state electrochromic device are problems that need to be urgently solved by those skilled in the art. Content of the Utility Model
[0006] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide an electrochromic component with high transmittance. By introducing an antireflection layer with a specific structure, the transmittance of the electrochromic component is increased by more than 5% in the faded state, and the transmittance in the colored state is not affected, thereby improving the transmittance change range of the fully solid-state electrochromic component.
[0007] To achieve this purpose, the utility model adopts the following technical solutions:
[0008] The present utility model provides an electrochromic component with high transmittance. The electrochromic component includes an electrochromic functional layer, a substrate layer, and an antireflection layer which are stacked.
[0009] The antireflection layer includes at least two low-refractive-index layers and at least one high-refractive-index layer which are stacked. The low-refractive-index layers and the high-refractive-index layer are alternately stacked, and both the innermost layer and the outermost layer are low-refractive-index layers.
[0010] In the antireflection layer, the refractive index of any low-refractive-index layer is less than that of the adjacent high-refractive-index layer.
[0011] In the present utility model, since each low-refractive-index layer uses the same material, its refractive index value is related to the specific thickness value of each low-refractive-index layer; similarly, since each high-refractive-index layer also uses the same material, its refractive index value is related to the specific thickness value of each high-refractive-index layer.
[0012] For the electrochromic component with high transmittance provided by the present utility model, the electrochromic component includes an electrochromic functional layer, a substrate layer, and an antireflection layer which are stacked. On the basis of the existing structure of the all-solid-state electrochromic component, an antireflection layer is introduced, which can greatly improve the transmittance of the device in the bleached state, while the transmittance in the colored state is not affected, which is mainly determined by the color-changing layer, thereby increasing the transmittance change range of the all-solid-state electrochromic component, that is, the difference between the transmittance in the bleached state and the transmittance in the colored state.
[0013] It should be noted that in the present utility model, the antireflection layer adopts a low-refractive-index layer and a high-refractive-index layer with a specific structural design to ensure that the transmittance of the electrochromic component is increased in the bleached state, thereby increasing the transmittance change range of the all-solid-state electrochromic component.
[0014] As a preferred technical solution of the present utility model, the low-refractive-index layer is a silica layer.
[0015] As a preferred technical solution of the present utility model, the materials of the high-refractive-index layers in the antireflection layer are the same.
[0016] The high-refractive-index layer is a titanium dioxide layer or a niobium pentoxide layer.
[0017] As a preferred technical solution of the present utility model, the total number of the low-refractive-index layers and the high-refractive-index layers is an odd number of layers, and the antireflection layer includes at least 5 layers of structure.
[0018] As a preferred technical solution of the present utility model, the thickness of the single-layer low refractive index layer is 5-100 nm. For example, it can be 10 nm, 15 nm, 20 nm, 25 nm, 30 nm, 35 nm, 40 nm or 45 nm, etc., but not limited to the listed values. Other unlisted values within the numerical range are equally applicable.
[0019] The thickness of the single-layer high refractive index layer is 10-200 nm. For example, it can be 20 nm, 30 nm, 40 nm, 50 nm, 60 nm, 70 nm, 80 nm, 90 nm, 100 nm, 110 nm, 120 nm, 130 nm, 140 nm, 150 nm, 160 nm, 170 nm, 180 nm or 190 nm, etc., but not limited to the listed values. Other unlisted values within the numerical range are equally applicable.
[0020] It is worth noting that by further controlling the thickness ranges of the low refractive index layer and the high refractive index layer in the present utility model, the transmittance of the electrochromic component can be increased by more than 5% in the bleached state, thereby enhancing the transmittance change range of the all-solid-state electrochromic component.
[0021] As a preferred technical solution of the present utility model, the thickness of the antireflection layer < 3 μm. For example, it can be 2.8 μm, 2.6 μm, 2.5 μm, 2.2 μm, 2 μm, 1.8 μm, 1.5 μm or 1 μm, etc., but not limited to the listed values. Other unlisted values within the numerical range are equally applicable.
[0022] As a preferred technical solution of the present utility model, the base layer is a glass layer.
[0023] As a preferred technical solution of the present utility model, the thickness of the base layer is 0.5-5 mm. For example, it can be 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm or 4.5 mm, etc., but not limited to the listed values. Other unlisted values within the numerical range are equally applicable.
[0024] As a preferred technical solution of the present utility model, the electrochromic functional layer includes a first transparent conductive layer, an ion storage layer, an ion conduction layer, an electrochromic layer and a second transparent conductive layer which are stacked;
[0025] The second transparent conductive layer is in contact with the base layer.
[0026] As a preferred technical solution of the present utility model, the electrochromic functional layer includes a first transparent conductive layer, an electrochromic layer, an ion conduction layer, an ion storage layer and a second transparent conductive layer which are stacked;
[0027] The second transparent conductive layer is in contact with the base layer.
[0028] In the present utility model, the materials and thicknesses of the layers of the electrochromic functional layer are not specifically limited, and those skilled in the art can select and set them according to actual needs.
[0029] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0030] The electrochromic component with high transmittance provided by the present utility model includes an electrochromic functional layer, a base layer, and an antireflection layer stacked. By introducing an antireflection layer with a specific structure on the basis of the existing all-solid-state electrochromic component structure, the transmittance of the electrochromic component can be greatly improved in the bleached state, while the transmittance in the colored state is not affected, thereby increasing the transmittance change range of the all-solid-state electrochromic component. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] Figure 1 It is a schematic structural diagram of the electrochromic component provided in Embodiment 1;
[0032] Figure 2 It is a schematic structural diagram of the electrochromic functional layer provided in Embodiment 1;
[0033] Figure 3 It is a schematic structural diagram of the antireflection layer provided in Embodiment 1.
[0034] Wherein, 1 - electrochromic functional layer, 2 - base glass layer, 3 - antireflection layer, 11 - first transparent conductive layer, 12 - ion storage layer, 13 - ion conduction layer, 14 - electrochromic layer, 15 - second transparent conductive layer, 31 - first low refractive index layer, 32 - first high refractive index layer, 33 - second low refractive index layer, 34 - second high refractive index layer, 35 - third low refractive index layer, 36 - third high refractive index layer, 37 - fourth low refractive index layer. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0035] It should be understood that in the description of the present utility model, the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.
[0036] It should be noted that in the description of the present utility model, unless otherwise clearly specified and defined, the terms "set", "connected", "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific situations.
[0037] The technical solution of the present utility model will be further described below with reference to the drawings and through specific embodiments.
[0038] Embodiment 1
[0039] This embodiment provides an electrochromic component with high transmittance. The electrochromic component (as shown in Figure 1 ) includes an electrochromic functional layer 1, a substrate glass layer 2, and an antireflection layer 3 which are stacked;
[0040] The electrochromic functional layer 1 (as shown in Figure 2 ) includes a first transparent conductive layer 11, an ion storage layer 12, an ion conduction layer 13, an electrochromic layer 14, and a second transparent conductive layer 15 which are stacked; the second transparent conductive layer 15 is in contact with the substrate glass layer 2;
[0041] The antireflection layer 3 (as shown in Figure 3 ) includes a first low refractive index layer 31, a first high refractive index layer 32, a second low refractive index layer 33, a second high refractive index layer 34, a third low refractive index layer 35, a third high refractive index layer 36, and a fourth low refractive index layer 37 which are stacked; the substrate glass layer 2 is in contact with the first low refractive index layer 31;
[0042] In the antireflection layer 3, the refractive index of any low-refractive-index layer is less than that of the adjacent high-refractive-index layer;
[0043] The first low-refractive-index layer 31, the second low-refractive-index layer 33, the third low-refractive-index layer 35, and the fourth low-refractive-index layer 37 are all silica layers;
[0044] The first high-refractive-index layer 32, the second high-refractive-index layer 34, and the third high-refractive-index layer 36 are all titanium dioxide layers;
[0045] In this embodiment, the thickness parameters of each layer in the antireflection layer and the thickness of the substrate glass layer are shown in Table 1.
[0046] Example 2
[0047] This embodiment provides a high-transmittance electrochromic component. The structure of the electrochromic component is the same as that of Example 1, except that the thickness of each layer in the antireflection layer is different from that of Example 1.
[0048] In this embodiment, the thickness parameters of each layer in the antireflection layer and the thickness of the substrate glass layer are shown in Table 1.
[0049] Example 3
[0050] This embodiment provides a high-transmittance electrochromic component. Except that the electrochromic functional layer includes a first transparent conductive layer, an electrochromic layer, an ion conduction layer, an ion storage layer, and a second transparent conductive layer which are stacked, other conditions are the same as those of Example 1.
[0051] Comparative Example 1
[0052] This comparative example provides a high-transmittance electrochromic component. Except that the antireflection layer includes a first low-refractive-index layer, a first high-refractive-index layer, and a second low-refractive-index layer which are stacked, other conditions are the same as those of Example 1.
[0053] Comparative Example 2
[0054] This comparative example provides an electrochromic component. Except that the antireflection layer is not provided, other conditions are the same as those of Example 1.
[0055] The transmittance of the electrochromic components obtained in the above Examples 1-2 and Comparative Examples 1-2 was tested. The power was turned on to make the electrochromic component reach the bleached state, and the transmittance was measured using an ultraviolet-visible-near-infrared spectrophotometer. The results are shown in Table 2.
[0056] Table 1
[0057] Example 1 Example 2 First low refractive index layer / nm 15.3 25.7 First high refractive index layer / nm 32.4 68.3 Second low refractive index layer / nm 28.5 56.2 Second high refractive index layer / nm 68.5 114.8 Third low refractive index layer / nm 35.2 46.9 Third high refractive index layer / nm 97.1 58.6 Fourth low refractive index layer / nm 48.8 74.1 Substrate glass layer / mm 3.2 3.2
[0058] Table 2
[0059]
[0060]
[0061] As can be seen from Table 2, for the electrochromic component with high transmittance provided by the present utility model, by introducing an antireflection layer with a specific structure, the transmittance of the electrochromic component in the bleached state is increased by more than 5%, thereby improving the transmittance change range of the all-solid-state electrochromic component.
[0062] The applicant declares that the above description is only a specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present utility model fall within the protection scope and the disclosure scope of the present utility model.
Claims
1. An electrochromic component with high transmittance, characterized in that, The electrochromic component includes an electrochromic functional layer, a base layer, and an antireflection layer that are stacked; The antireflection layer includes at least two low-refractive-index layers and at least one high-refractive-index layer, the low-refractive-index layers and the high-refractive-index layers are alternately stacked, and both the innermost layer and the outermost layer are low-refractive-index layers; In the antireflection layer, the refractive index of any low-refractive-index layer is less than the refractive index of the adjacent high-refractive-index layer.
2. The electrochromic component with high transmittance according to claim 1, wherein, The low-refractive-index layer is a silicon dioxide layer.
3. The electrochromic component with high transmittance according to claim 1, characterized in that, The materials of the high-refractive-index layers in the antireflection layer are the same; The high-refractive-index layer is a titanium dioxide layer or a niobium pentoxide layer.
4. The electrochromic component with high transmittance according to claim 1, characterized in that, The total number of layers of the low-refractive-index layers and the high-refractive-index layers is an odd number, and the antireflection layer includes at least 5 layers of structure.
5. The electrochromic component with high transmittance according to claim 1, characterized in that, The thickness of a single low-refractive-index layer is 5-100 nm; The thickness of a single high-refractive-index layer is 10-200 nm.
6. The electrochromic component with high transmittance according to claim 1, characterized in that, The total thickness of the antireflection layer < 3 μm.
7. The electrochromic component with high transmittance according to claim 1, wherein The base layer is a glass layer.
8. The electrochromic component with high transmittance according to claim 1, characterized in that, The thickness of the base layer is 0.5-5 mm.
9. The electrochromic component with high transmittance according to claim 1, characterized in that The electrochromic functional layer includes a first transparent conductive layer, an ion storage layer, an ion conduction layer, an electrochromic layer, and a second transparent conductive layer that are stacked; The second transparent conductive layer is in contact with the base layer.
10. The electrochromic component with high transmittance according to claim 1, characterized in that, The electrochromic functional layer includes a first transparent conductive layer, an electrochromic layer, an ion conduction layer, an ion storage layer, and a second transparent conductive layer that are stacked; The second transparent conductive layer is in contact with the base layer.