CN117631393A - Flexible electrochromic device and preparation method thereof - Google Patents
Flexible electrochromic device and preparation method thereof Download PDFInfo
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- CN117631393A CN117631393A CN202311681648.5A CN202311681648A CN117631393A CN 117631393 A CN117631393 A CN 117631393A CN 202311681648 A CN202311681648 A CN 202311681648A CN 117631393 A CN117631393 A CN 117631393A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 239000010410 layer Substances 0.000 claims abstract description 216
- 239000000758 substrate Substances 0.000 claims abstract description 30
- 239000011229 interlayer Substances 0.000 claims abstract description 12
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 34
- 239000011241 protective layer Substances 0.000 claims description 26
- 230000004888 barrier function Effects 0.000 claims description 15
- 239000002245 particle Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 8
- 239000002131 composite material Substances 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 6
- 239000004020 conductor Substances 0.000 claims description 6
- 239000012812 sealant material Substances 0.000 claims description 4
- XHCLAFWTIXFWPH-UHFFFAOYSA-N [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] XHCLAFWTIXFWPH-UHFFFAOYSA-N 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 230000001680 brushing effect Effects 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000013329 compounding Methods 0.000 claims description 3
- 238000007598 dipping method Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 229920006254 polymer film Polymers 0.000 claims description 3
- 229910052709 silver Inorganic materials 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 229910001935 vanadium oxide Inorganic materials 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
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- Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
Abstract
The invention relates to the technical field of electrochromic and discloses a flexible electrochromic device and a preparation method thereof, wherein the flexible electrochromic device comprises a first substrate layer, a first group of interlayer is arranged at the top of the first substrate layer, a first conductive layer is arranged at the top of the first group of interlayer, a first buffer layer is arranged at the top of the first conductive layer, an electrochromic layer is arranged at the top of the first buffer layer, a second buffer layer is arranged at the top of the electrochromic layer, and a second conductive layer is arranged at the top of the second buffer layer. According to the flexible electrochromic device and the preparation method thereof, the first buffer layer and the second buffer layer are arranged, so that uneven or microscopic defects possibly existing on the surface of a flexible substrate can be filled, deposition of subsequent materials and formation of uniform films are facilitated, meanwhile, a buffer effect can be achieved, stress differences among different materials are reduced, and stability and reliability of the device are improved; the first buffer layer and the second buffer layer may enhance a bonding force between materials.
Description
Technical Field
The invention relates to the technical field of electrochromic, in particular to a flexible electrochromic device and a preparation method thereof.
Background
A flexible electrochromic device is a device capable of changing its color or transparency, and its working principle is to control the optical properties of a material by using the action of an electric field, where the device is generally composed of a transparent base material, a dielectric layer and an electrochromic layer, and when the electric field is applied, charges in the dielectric layer move and change the refractive index or absorption property of the electrochromic layer, so that the propagation mode of light changes, and further, the color or transparency is adjusted.
The existing electrochromic device may have performance degradation or failure under the conditions of bending, stretching, environmental change and the like, and long-time use may cause problems of color attenuation, slow response speed, reduced reversibility and the like, thereby affecting the stability and reliability of the device.
Disclosure of Invention
(one) solving the technical problems
Aiming at the defects of the prior art, the invention provides a flexible electrochromic device with good long-term stability and reliability and a preparation method thereof.
(II) technical scheme
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a flexible electrochromic device, includes first substrate layer, the top of first substrate layer is provided with first group's interlayer, the top of first group's interlayer is provided with first conducting layer, the top of first conducting layer is provided with first buffer layer, the top of first buffer layer is provided with electrochromic layer, the top of electrochromic layer is provided with the second buffer layer, the top of second buffer layer is provided with the second conducting layer, the top of second conducting layer is provided with the second group's interlayer, the top of second group's interlayer is provided with the second substrate layer, the surface of first conducting layer and second conducting layer all is provided with first protective layer, the surface of electrochromic layer is provided with the second protective layer.
Preferably, printable conductive materials are arranged on the first conductive layer and the second conductive layer, and the printable conductive materials are Ag, cu or CuNI alloy.
Preferably, the thickness of the first conductive layer and the second conductive layer is 4-10 μm.
Preferably, the first buffer layer and the second buffer layer are made of p-styrene.
Preferably, the preparation of the first buffer layer and the second buffer layer specifically comprises the following steps:
s1, preparing styrene particles, and cleaning the surfaces of a first conductive layer and a second conductive layer to ensure no impurity;
s2, uniformly coating the styrene particles on the surface and the edge of the device, wherein the styrene particles can be coated by brushing, spraying and dipping methods, so that the uniformity and consistency of a styrene layer are ensured;
s3, drying and curing the coated p-styrene layer to form a stable buffer layer;
s4, checking the prepared buffer layer to ensure that the quality and thickness of the buffer layer meet the requirements.
Preferably, the electrochromic layer is made of vanadium oxide, and the thickness of the first substrate layer and the thickness of the second substrate layer are selected from 100 to 180 μm independently of each other.
Preferably, the first protective layer is a polymer film, and the second protective layer is a sealant material.
A method for manufacturing a flexible electrochromic device, suitable for use in any one of the above flexible electrochromic devices, comprising the steps of:
s1, sequentially forming a first barrier layer and a first conductive layer on the surface of one side of a first substrate layer, and forming a first buffer layer on the side, far away from the first barrier layer, of the first conductive layer to obtain a first composite layer;
s2, sequentially forming a second barrier layer and a second conductive layer on the surface of one side of the second substrate layer, and forming a second buffer layer on the side, far away from the second barrier layer, of the second conductive layer to obtain a second composite layer;
s3, compounding the first compound layer, the electrochromic layer and the second compound layer to obtain a flexible electrochromic device;
s4, forming a first protective layer on the outer surfaces of the first conductive layer and the second conductive layer, and forming a second protective layer on the outer surface of the color-changing layer.
(III) beneficial effects
Compared with the prior art, the invention provides a flexible electrochromic device and a preparation method thereof, and the flexible electrochromic device has the following beneficial effects:
1. according to the flexible electrochromic device and the preparation method thereof, the first buffer layer and the second buffer layer are arranged, so that uneven or microscopic defects possibly existing on the surface of a flexible substrate can be filled, a smoother surface is provided, deposition of subsequent materials and formation of uniform films are facilitated, meanwhile, a buffer effect can be achieved, stress differences among different materials are reduced, and stability and reliability of the device are improved; and the surface characteristics of the flexible substrate may be unfavorable for the adhesion of electrochromic materials, the first buffer layer and the second buffer layer can provide better adhesion, the binding force between materials is enhanced, and interlayer peeling or falling-off is prevented; meanwhile, the first buffer layer and the second buffer layer which are made of the styrene have enough softness and ductility, can adapt to bending and deformation of the flexible electrochromic device, have good transparency and optical performance on the styrene, and can not obviously influence the optical characteristics of the device when being used as a buffer layer material.
2. According to the flexible electrochromic device and the preparation method thereof, the first protective layer and the second protective layer are arranged, so that a physical barrier can be provided, the electrochromic device is isolated from the external environment, the device is prevented from being invaded and damaged by dust, moisture, chemical substances and the like, and the service life and the stability of the device are prolonged; has good oxidation and moisture resistance, can effectively block the permeation of oxygen and moisture, electrochromic layers or other critical components within the device are protected from oxidation or corrosion, thereby preserving the performance and stability of the device.
Drawings
FIG. 1 is a three-dimensional schematic view of the structure of the present invention;
FIG. 2 is a front cross-sectional view of the present invention;
fig. 3 is an enlarged view of the structure of fig. 2 a according to the present invention.
In the figure: 1 a first substrate layer, 2 a first set of spacers, 3 a first conductive layer, 4 a first buffer layer, 5 an electrochromic layer, 6 a second buffer layer, 7 a second conductive layer, 8 a second set of spacers, 9 a second substrate layer, 10 a first protective layer, 11 a second protective layer.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
Referring to fig. 1-3, a flexible electrochromic device includes a first substrate layer 1, a first group of spacers 2 is disposed on top of the first substrate layer 1, a first conductive layer 3 is disposed on top of the first group of spacers 2, a first buffer layer 4 is disposed on top of the first conductive layer 3, an electrochromic layer 5 is disposed on top of the first buffer layer 4, a second buffer layer 6 is disposed on top of the electrochromic layer 5, a second conductive layer 7 is disposed on top of the second buffer layer 6, a second group of spacers 8 is disposed on top of the second conductive layer 7, a second substrate layer 9 is disposed on top of the second group of spacers 8, first protective layers 10 are disposed on outer surfaces of the first conductive layer 3 and the second conductive layer 7, and a second protective layer 11 is disposed on outer surfaces of the electrochromic layer 5.
Specifically, printable conductive materials are arranged on the first conductive layer 3 and the second conductive layer 7, the printable conductive materials are Ag or Cu or CuNI alloy, the materials of the first conductive layer 3 and the second conductive layer 7 are UV glue with transparent conductive particles, the transparent conductive particles are ultrathin Ag particles or Cu particles and titanium aluminum particles, the thicknesses of the first conductive layer 3 and the second conductive layer 7 are 4-10 mu m, and the structural design of the first conductive layer 3 and the second conductive layer 7 enables the electro-conductive layer to be bent and folded.
Specifically, the first buffer layer 4 and the second buffer layer 6 are made of p-styrene, the first buffer layer 4 and the second buffer layer 6 can fill uneven surfaces or microscopic defects of the first conductive layer 3 and the second conductive layer 7, a smoother surface is provided, deposition of subsequent materials and formation of uniform films are facilitated, meanwhile, the first buffer layer 4 and the second buffer layer 6 made of p-styrene have enough flexibility and ductility, can adapt to bending and deformation of a flexible electrochromic device, have good transparency and optical performance on the styrene, and can not obviously influence the optical characteristics of the device when being used as a buffer layer material.
Specifically, the preparation of the first buffer layer 4 and the second buffer layer 6 specifically comprises the following steps:
s1, preparing styrene particles, and cleaning the surfaces of a first conductive layer 3 and a second conductive layer 7 to ensure no impurities;
s2, uniformly coating the styrene particles on the surface and the edge of the device, wherein the styrene particles can be coated by brushing, spraying and dipping methods, so that the uniformity and consistency of a styrene layer are ensured;
s3, drying and curing the coated p-styrene layer to form a stable buffer layer;
s4, checking the prepared buffer layer to ensure that the quality and thickness of the buffer layer meet the requirements.
In particular, the electrochromic layer 5 is made of vanadium oxide, the thickness of the first substrate layer 1 and the thickness of the second substrate layer 9 being chosen independently of each other from 100 to 180 μm, for example 100 μm, 110 μm, 120 μm, 125 μm, 130 μm, 140 μm, 150 μm, 160 μm, 170 μm, 180 μm.
Specifically, the first protective layer 10 is a polymer film, the second protective layer 11 is a sealant material, and the sealant material, such as silicone rubber, has good flexibility, high temperature resistance and chemical corrosion resistance, can provide a stable sealing effect in a wide temperature range, and has good barrier properties to moisture and oxygen, so that the first protective layer 10 and the second protective layer 11 have good electrical insulation and shielding properties, can prevent interaction between an electrochromic device and an external electric field or electromagnetic interference, and avoid influence of interference on device performance.
Example 2
The invention provides a preparation method of a flexible electrochromic device, which comprises the following steps:
s1, sequentially forming a first barrier layer 2 and a first conductive layer 3 on the surface of one side of a first substrate layer 1, and forming a first buffer layer 4 on the side, away from the first barrier layer 2, of the first conductive layer 3 to obtain a first composite layer;
s2, sequentially forming a second barrier layer 8 and a second conductive layer 7 on the surface of one side of the second substrate layer 9, and forming a second buffer layer 6 on the side, away from the second barrier layer 8, of the second conductive layer 7 to obtain a second composite layer;
s3, compounding the first compound layer, the electrochromic layer 5 and the second compound layer to obtain a flexible electrochromic device;
s4, forming a first protective layer 10 on the outer surfaces of the first conductive layer 3 and the second conductive layer 7, and forming a second protective layer 11 on the outer surface of the color-changing layer 5.
In summary, according to the flexible electrochromic device and the preparation method thereof, by arranging the first buffer layer 4 and the second buffer layer 6, the surface of the flexible substrate can be filled up with possible unevenness or microscopic defects, a smoother surface is provided, deposition of subsequent materials and formation of uniform films are facilitated, meanwhile, a buffer effect can be achieved, stress differences among different materials are reduced, and stability and reliability of the device are improved. And the surface characteristics of the flexible substrate may be unfavorable for the adhesion of electrochromic materials, the first buffer layer 4 and the second buffer layer 6 may provide better adhesion, enhance the bonding force between materials, and prevent interlayer peeling or falling off; meanwhile, the first buffer layer 4 and the second buffer layer 6 which are made of the styrene have enough softness and ductility, can adapt to the bending and deformation of the flexible electrochromic device, have good transparency and optical performance to the styrene, and can not obviously influence the optical characteristics of the device when being used as a buffer layer material.
In addition, by providing the first protective layer 10 and the second protective layer 11, a physical barrier can be provided to isolate the electrochromic device from the external environment, so that the device is prevented from being invaded and damaged by dust, moisture, chemical substances and the like, and the service life and the stability of the device are prolonged; the electrochromic device has good oxidation and moisture resistance, can effectively block permeation of oxygen and moisture, avoids the influence of oxidation or corrosion on an electrochromic layer or other key elements in the device, thereby maintaining the performance and stability of the device, and solving the problems that the current electrochromic device can be degraded or invalid in the conditions of bending, stretching, environmental change and the like, and the stability and reliability of the device are influenced due to the fact that the color attenuation, the slow response speed or the reduced reversibility are caused by long-time use.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A flexible electrochromic device comprising a first substrate layer (1), characterized in that: the top of first substrate layer (1) is provided with first group interlayer (2), the top of first group interlayer (2) is provided with first conducting layer (3), the top of first conducting layer (3) is provided with first buffer layer (4), the top of first buffer layer (4) is provided with electrochromic layer (5), the top of electrochromic layer (5) is provided with second buffer layer (6), the top of second buffer layer (6) is provided with second conducting layer (7), the top of second conducting layer (7) is provided with second group interlayer (8), the top of second group interlayer (8) is provided with second substrate layer (9), the surface of first conducting layer (3) and second conducting layer (7) all is provided with first protective layer (10), the surface of electrochromic layer (5) is provided with second protective layer (11).
2. A flexible electrochromic device according to claim 1, characterized in that: the first conductive layer (3) and the second conductive layer (7) are respectively provided with a printable conductive material, and the printable conductive material is Ag or Cu or CuNI alloy.
3. A flexible electrochromic device according to claim 1, characterized in that: the thickness of the first conductive layer (3) and the second conductive layer (7) is 4-10 mu m.
4. A flexible electrochromic device according to claim 1, characterized in that: the first buffer layer (4) and the second buffer layer (6) are made of p-styrene.
5. A flexible electrochromic device according to claim 1, characterized in that: the preparation method of the first buffer layer (4) and the second buffer layer (6) comprises the following specific steps:
s1, preparing styrene particles, and cleaning the surfaces of a first conductive layer (3) and a second conductive layer (7) to ensure no impurities;
s2, uniformly coating the styrene particles on the surface and the edge of the device, wherein the styrene particles can be coated by brushing, spraying and dipping methods, so that the uniformity and consistency of a styrene layer are ensured;
s3, drying and curing the coated p-styrene layer to form a stable buffer layer;
s4, checking the prepared buffer layer to ensure that the quality and thickness of the buffer layer meet the requirements.
6. A flexible electrochromic device according to claim 1, characterized in that: the electrochromic layer (5) is made of vanadium oxide, the thickness of the first substrate layer (1) and the thickness of the second substrate layer (9) being selected independently of each other from 100-180 μm.
7. A flexible electrochromic device according to claim 1, characterized in that: the first protective layer (10) is a polymer film, and the second protective layer (11) is a sealant material.
8. A method of manufacturing a flexible electrochromic device suitable for use in a flexible electrochromic device according to any one of claims 1 to 7, characterized in that: the method comprises the following steps:
s1, sequentially forming a first barrier layer (2) and a first conductive layer (3) on the surface of one side of a first substrate layer (1), and forming a first buffer layer (4) on one side of the first conductive layer (3) far away from the first barrier layer (2) to obtain a first composite layer;
s2, sequentially forming a second barrier layer (8) and a second conductive layer (7) on the surface of one side of the second substrate layer (9), and forming a second buffer layer (6) on the side, far away from the second barrier layer (8), of the second conductive layer (7) to obtain a second composite layer;
s3, compounding the first compound layer, the electrochromic layer (5) and the second compound layer to obtain a flexible electrochromic device;
s4, forming a first protective layer (10) on the outer surfaces of the first conductive layer (3) and the second conductive layer (7), and forming a second protective layer (11) on the outer surface of the color-changing layer (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311681648.5A CN117631393A (en) | 2023-12-08 | 2023-12-08 | Flexible electrochromic device and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311681648.5A CN117631393A (en) | 2023-12-08 | 2023-12-08 | Flexible electrochromic device and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN117631393A true CN117631393A (en) | 2024-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311681648.5A Pending CN117631393A (en) | 2023-12-08 | 2023-12-08 | Flexible electrochromic device and preparation method thereof |
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| Country | Link |
|---|---|
| CN (1) | CN117631393A (en) |
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- 2023-12-08 CN CN202311681648.5A patent/CN117631393A/en active Pending
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