An electrochromic device
By forming an insulating layer on the second conductive layer of the electrochromic device, the problem of high sealant requirements in the prior art is solved, effective anti-oxidation of the electrochromic layer is achieved, and process difficulty and cost are reduced.
Patent Information
- Application Number
- CN202421336016.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-12
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2034-06-12
AI Technical Summary
The existing electrochromic devices have high requirements for sealant during packaging, resulting in narrow effective areas, thick edge sealing and single mode, making it difficult to effectively prevent the oxidation of the electrochromic layer.
An insulating layer is formed on the second conductive layer, and the insulating layer covers the surface of the second conductive layer. The requirements for the encapsulation layer are reduced during subsequent packaging, and process difficulty and cost are reduced.
The insulating layer isolates water vapor, prevents oxidation, and reduces the requirements of the encapsulation layer, simplifies the process flow and reduces costs.
Smart Images
Figure CN222748830U_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the technical field of electrochromic technology, and in particular to an electrochromic device. Background Art
[0002] Electrochromic lenses refer to lenses made using the electrochromic principle. The degree of coloring of the lenses can be changed by changing the input voltage of the electrodes on the lenses, so that the electrochromic lenses can adapt to usage scenarios with different ambient light intensities. Electrochromic lenses generally include a base, a first transparent conductive layer, an electrochromic layer, a second transparent conductive layer and a substrate. The electrochromic layer is made of an inorganic all-solid material. Therefore, when the substrate is set on the second transparent conductive layer, it is necessary to apply a sealant on the periphery of the electrochromic layer and the second transparent conductive layer to seal the electrochromic device as a whole to prevent water vapor from entering the electrochromic device and causing oxidation of the electrochromic layer.
[0003] However, the electrochromic device in the prior art has high requirements for sealant during packaging. The coating thickness, width, coating method and type of the sealant must meet the corresponding requirements to prevent or slow down the oxidation of the electrochromic layer. The electrochromic device made by the above method has a narrow effective area, thick sealing edge, and a single mode. Summary of the invention
[0004] The present disclosure provides an electrochromic device to at least solve the above technical problems existing in the prior art.
[0005] According to a first aspect of the present disclosure, an electrochromic device is provided, the device comprising:
[0006] a first substrate;
[0007] An auxiliary layer, a first conductive layer, an electrochromic layer, and a second conductive layer stacked in sequence on the first substrate;
[0008] An insulating layer is located on the second conductive layer.
[0009] In one embodiment, the material of the insulating layer is the same as that of the auxiliary layer.
[0010] In one embodiment, the insulating layer is made of at least one of silicon, silicon nitride or silicon oxide.
[0011] In one possible implementation manner, the thickness of the insulating layer is in the range of 50 nm to 200 nm.
[0012] In one embodiment, the material of the first conductive layer and the second conductive layer includes at least one of indium tin oxide, indium oxide, doped indium oxide, tin oxide, doped tin oxide, fluorinated tin oxide, zinc oxide, and doped zinc oxide.
[0013] In one possible implementation, the device further comprises:
[0014] a first trench, wherein the first trench penetrates the first conductive layer and the auxiliary layer;
[0015] a second groove, passing through the insulating layer, the second conductive layer, the electrochromic layer and the first conductive layer;
[0016] a third trench, penetrating the insulating layer and the second conductive layer;
[0017] A fourth trench penetrates the insulating layer, and the fourth trench is located above the first trench.
[0018] In one possible implementation, the device further comprises:
[0019] a first electrode located in the second groove, wherein the first electrode leads out of the first conductive layer;
[0020] A second electrode is located in the fourth trench, and the second electrode leads out of the second conductive layer.
[0021] In one embodiment, a width of at least a portion of the first electrode located between the second conductive layers is smaller than a width of the second trench.
[0022] In one possible implementation, the material of the first electrode and the second electrode includes at least one of conductive silver paste, indium and its alloys, or tin and its alloys.
[0023] In one possible implementation, the device further comprises:
[0024] An encapsulation layer, wherein the encapsulation layer at least covers sides of the electrochromic layer and the second conductive layer.
[0025] The electrochromic device disclosed in the present invention forms an insulating layer on the second conductive layer, and the insulating layer covers the surface of the second conductive layer, which not only can isolate water vapor and prevent oxidation, but also greatly reduces the requirements for the formed packaging layer during subsequent packaging, thereby reducing the process difficulty and the process cost.
[0026] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present disclosure, nor is it intended to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] The above and other objects, features and advantages of the exemplary embodiments of the present disclosure will become readily understood by reading the detailed description below with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present disclosure are shown in an exemplary and non-limiting manner, in which:
[0028] In the drawings, the same or corresponding reference numerals represent the same or corresponding parts.
[0029] Figure 1 A schematic diagram of the structure of an electrochromic device provided in an embodiment of the present disclosure. DETAILED DESCRIPTION
[0030] In order to make the purpose, features, and advantages of the present disclosure more obvious and easy to understand, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present disclosure.
[0031] The present disclosure provides an electrochromic device. Figure 1 A schematic diagram of the structure of an electrochromic device provided in an embodiment of the present disclosure.
[0032] like Figure 1 As shown, the electrochromic device includes: a first substrate 10 ; an auxiliary layer 20 , a first conductive layer 30 , an electrochromic layer 40 , and a second conductive layer 50 stacked in sequence on the first substrate 10 ; and an insulating layer 60 on the second conductive layer 50 .
[0033] In one embodiment, the first substrate 10 is a transparent substrate. Specifically, the first substrate 10 may be a glass substrate.
[0034] In one embodiment, the material of the auxiliary layer 20 includes at least one of silicon, silicon nitride or silicon oxide. Preferably, the material of the auxiliary layer 20 is silicon, which can make the first conductive layer 30 adhere to the first substrate 10 better.
[0035] The thickness of the auxiliary layer 20 is in the range of 50 nm to 200 nm.
[0036] The material of the first conductive layer 30 includes at least one of indium tin oxide, indium oxide, doped indium oxide, tin oxide, doped tin oxide, fluorinated tin oxide, zinc oxide, and doped zinc oxide. Preferably, the material of the first conductive layer 30 is indium tin oxide, which has high conductivity, mature technology, and good weather resistance.
[0037] The thickness of the first conductive layer 30 is 200nm-350nm, and the preferred thickness is 300nm, because if the thickness is too thin, the resistance will increase, resulting in a decrease in the voltage applied to the electrochromic layer and a decrease in the color change range. If the thickness is too thick, the cost will increase.
[0038] In one embodiment, the material of the electrochromic layer 40 includes nickel oxide, which is a common anodic coloring material. The electrochromic layer 40 may be doped with tungsten ions during preparation to improve the color changing efficiency.
[0039] The material of the second conductive layer 50 includes at least one of indium tin oxide, indium oxide, doped indium oxide, tin oxide, doped tin oxide, fluorinated tin oxide, zinc oxide, and doped zinc oxide. Preferably, the material of the second conductive layer 50 is indium tin oxide, which has high conductivity, mature technology, and good weather resistance.
[0040] The thickness of the second conductive layer 50 is 200nm-350nm, and the preferred thickness is 300nm, because if the thickness is too thin, the resistance will increase, resulting in a decrease in the voltage applied to the electrochromic layer and a decrease in the color change range. If the thickness is too thick, the cost will increase.
[0041] In one embodiment, the material of the insulating layer 60 includes at least one of silicon, silicon nitride or silicon oxide.
[0042] In one embodiment, the material of the insulating layer 60 is the same as that of the auxiliary layer 20. The insulating layer 60 and the auxiliary layer 20 are made of the same material, so the insulating layer 60 can be formed using the same process steps as the auxiliary layer 20, thereby reducing process steps and costs.
[0043] In one embodiment, the thickness of the insulating layer 60 is in the range of 50 nm to 200 nm. The thickness of the insulating layer 60 cannot be too thin, otherwise it cannot play the role of insulating and isolating water vapor and preventing oxidation, nor can it be too thick, which affects the thickness of the entire device.
[0044] In the disclosed embodiment, the insulating layer 60 covers the surface of the second conductive layer 50, which not only isolates water vapor and prevents oxidation, but also greatly reduces the requirements for the packaging layer to be formed during subsequent packaging, thereby reducing the process difficulty and the process cost.
[0045] In one embodiment, the electrochromic device further includes: a first groove 71, the first groove 71 penetrates the first conductive layer 30 and the auxiliary layer 20;
[0046] The second groove 72 penetrates the insulating layer 60, the second conductive layer 50, the electrochromic layer 40 and the first conductive layer 30;
[0047] A third trench 73, penetrating the insulating layer 60 and the second conductive layer 50;
[0048] The fourth trench 74 penetrates the insulating layer 60 , and is located above the first trench 71 .
[0049] The first trench 71 and the third trench 73 may not be filled with any material subsequently.
[0050] The first groove 71 is located below the fourth groove 74, which can prevent the first conductive layer 30 and the second conductive layer 50 from short-circuiting when the second electrode is subsequently formed in the fourth groove 74. This is because when the material of the second electrode is deposited, material particles may pierce the second conductive layer 50 and reach the first conductive layer 30, thereby causing a short circuit.
[0051] The third trench 73 disconnects the second conductive layer 50 from the second trench 72 , so as to prevent a short circuit caused by contact between the first electrode and the second conductive layer 50 when the first electrode is formed in the second trench 72 .
[0052] In one embodiment, the electrochromic device further includes: a first electrode 81 located in the second groove 72 , the first electrode 81 leading out of the first conductive layer 30 ;
[0053] The second electrode 82 is located in the fourth trench 74 , and the second electrode 82 leads out of the second conductive layer 50 .
[0054] The material of the first electrode 81 and the second electrode 82 includes at least one of a conductive silver paste, indium and its alloy, or tin and its alloy.
[0055] In one embodiment, the width of at least a portion of the first electrode 81 located between the second conductive layers 50 is smaller than the width of the second trench 72 .
[0056] Specifically, Figure 1 As shown, the width of the portion of the first electrode 81 located between the first conductive layers 30 is the same as the width of the second groove 72, so as to be connected to the first conductive layer 30 and lead out the first conductive layer 30, and the width of the portion of the first electrode 81 located above the first conductive layer 30 is smaller than the width of the second groove 72, so as to prevent the first electrode 81 from contacting the second conductive layer 50 and causing a short circuit.
[0057] The width of the second electrode 82 may be smaller than the width of the fourth trench 74 , or may be equal to the width of the fourth trench 74 .
[0058] In one embodiment, the electrochromic device further includes: an encapsulation layer (not shown in the figure), which at least covers the sides of the electrochromic layer 40 and the second conductive layer 50 .
[0059] The encapsulation layer can further play a role in isolating water vapor and preventing oxidation. Moreover, in this embodiment, because an insulating layer is added, the requirements for the encapsulation layer are greatly reduced, the process difficulty is reduced, and the process cost is reduced.
[0060] The material of the packaging layer includes but is not limited to sealant.
[0061] In one embodiment, the electrochromic device further includes: a second substrate (not shown in the figure) located on the insulating layer.
[0062] The second substrate is a transparent substrate. Specifically, the second substrate may be a glass substrate.
[0063] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps recorded in this disclosure can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solutions disclosed in this disclosure can be achieved, and this document does not limit this.
[0064] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present disclosure, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0065] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.
Claims
1. An electrochromic device, characterized in that: The device comprises: a first substrate; An auxiliary layer, a first conductive layer, an electrochromic layer, and a second conductive layer stacked in sequence on the first substrate; An insulating layer is located on the second conductive layer, wherein the thickness of the insulating layer is in the range of 50 nm to 200 nm.
2. The electrochromic device according to claim 1, characterized in that: The material of the insulating layer is the same as that of the auxiliary layer.
3. The electrochromic device according to claim 1, characterized in that: The material of the insulating layer includes any one of silicon, silicon nitride or silicon oxide.
4. The electrochromic device according to claim 1, characterized in that: The material of the first conductive layer and the second conductive layer includes any one of indium tin oxide, indium oxide, doped indium oxide, tin oxide, doped tin oxide, fluorinated tin oxide, zinc oxide, and doped zinc oxide.
5. The electrochromic device according to claim 1, characterized in that: The device further comprises: a first trench, wherein the first trench penetrates the first conductive layer and the auxiliary layer; a second groove, passing through the insulating layer, the second conductive layer, the electrochromic layer and the first conductive layer; a third trench, penetrating the insulating layer and the second conductive layer; A fourth trench penetrates the insulating layer, and the fourth trench is located above the first trench.
6. The electrochromic device according to claim 5, characterized in that: The device further comprises: a first electrode located in the second groove, wherein the first electrode leads out of the first conductive layer; A second electrode is located in the fourth trench, and the second electrode leads out of the second conductive layer.
7. The electrochromic device according to claim 6, characterized in that: A width of at least a portion of the first electrode located between the second conductive layers is smaller than a width of the second trench.
8. The electrochromic device according to claim 6, characterized in that: The material of the first electrode and the second electrode includes any one of conductive silver paste, indium and its alloy or tin and its alloy.
9. The electrochromic device according to claim 1, characterized in that: The device further comprises: a packaging layer, wherein the packaging layer at least covers the sides of the electrochromic layer and the second conductive layer.