CN115390327A - Electrochromic device and electronic terminal - Google Patents

Abstract

The invention provides an electrochromic device and an electronic terminal. The device comprises a first substrate layer, a first conductive layer, an electrochromic layer, a second conductive layer and a second substrate layer which are sequentially stacked; the first conductive layer comprises a first conductive area and a second conductive area, the second conductive area is not contacted with the edge of the first conductive area at least partially, and the conductivity of the first conductive area is different from that of the second conductive area; and/or the second conductive layer comprises a third conductive area and a fourth conductive area, the edge of the fourth conductive area and the edge of the third conductive area are at least partially not contacted, and the conductivity of the third conductive area and the fourth conductive area is different. The novel conductive area is added on the basis of the original conductive area, so that the attractive effects of various patterns and colors are presented, meanwhile, the novel conductive area is added, a peripheral bus bar is not required to be additionally arranged, a shielding layer is not required to be arranged, and the color change speed of the electrochromic device is greatly improved.

Description

Electrochromic device and electronic terminal

Technical Field

The invention belongs to the technical field of color-changing devices, and relates to an electrochromic device and an electronic terminal.

Background

The electrochromic is a phenomenon that under the action of an external electric field, ions are embedded into the material to enable the valence state and chemical components of the material to be reversibly changed, so that the optical properties of the material are reversibly changed. Electrochromic materials are of many kinds, mainly including transition metal oxides, conductive polymers, small molecule dyes and complexes, etc. Electrochromic devices assembled from electrochromic materials have wide applications, such as smart windows, anti-glare rearview mirrors, aerospace thermal controls, aircraft windows, and the like. Therefore, the research significance of the novel safe, reliable and low-cost electrochromic device preparation technology is very important.

The electrochromic device generally comprises a first substrate layer, a first conducting layer, an electrochromic layer, a second conducting layer and a second substrate layer which are arranged in a stacked mode, wherein the first conducting layer and the second conducting layer are generally made of transparent ITO materials, and the conductivity of ITO is low, so that the surface resistance of the first conducting layer and the surface resistance of the second conducting layer are large, the electrochromic device is nonuniform in color change, the edge color change is fast, the middle color change is slow, and the time required for the device to integrally complete color change is long. In the prior art, in order to reduce the surface resistance of the conductive layer, a bus bar is disposed at an edge of the first/second conductive layer, the bus bar is usually made of a highly conductive material (such as silver paste, copper wire, etc.), and for aesthetic reasons, a shielding layer is further disposed at the edge to shield the bus bar. The prior art has complex process and higher production cost, and can not solve the problems of fast edge color change and slow middle color change.

Therefore, how to improve the aesthetic effect of the electrochromic device and improve the color change speed of the electrochromic device is a technical problem to be solved urgently.

Disclosure of Invention

The invention aims to provide an electrochromic device and an electronic terminal. According to the invention, the new conductive area is added on the basis of the original conductive area, and at least part of the new conductive area is positioned in the non-edge area of the original conductive area, so that the color change speed of the central area of the electrochromic device can be greatly improved, an edge bus bar is not additionally arranged, an edge shielding layer is not required to be arranged, the production process is greatly simplified, and the production cost is reduced.

In order to achieve the purpose, the invention adopts the following technical scheme:

in a first aspect, the present invention provides an electrochromic device, including a first substrate layer, a first conductive layer, an electrochromic layer, a second conductive layer, and a second substrate layer, which are sequentially stacked;

the first conductive layer comprises a first conductive area and a second conductive area, the second conductive area is not contacted with the edge of the first conductive area at least partially, and the conductivity of the first conductive area and the second conductive area is different;

and/or the presence of a gas in the atmosphere,

the second conductive layer comprises a third conductive area and a fourth conductive area, the fourth conductive area is not contacted with the edge of the third conductive area at least partially, and the conductivity of the third conductive area is different from that of the fourth conductive area.

It should be noted that, in the present invention, the edge of the first conductive area refers to the outer peripheral edge of the first conductive area, and the edge of the third conductive area refers to the outer peripheral edge of the third conductive area. At least some of the portions not in contact with each other include all of the portions not in contact, and some of the portions in contact are not in contact.

Meanwhile, the shapes of the second conductive region and the fourth conductive region are not particularly limited, and can be arbitrarily adjusted according to actual needs, for example, the shapes of the second conductive region and the fourth conductive region can be circular, square, pentagram-shaped, and the like.

According to the electrochromic device provided by the invention, the new conductive area (the second conductive area and/or the fourth conductive area) with different conductivity is added on the basis of the original conductive area (the first conductive area and/or the third conductive area), and at least part of the new conductive area is positioned in the non-edge area of the original conductive area, so that the color change speed of the central area of the electrochromic device can be greatly improved, a bus bar is not additionally arranged at the edge, an edge shielding layer is not required to be arranged, the production process is greatly simplified, and the production cost is reduced.

Preferably, the edge of the first conductive region is a region having a distance of 10mm or less, such as 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm or 10mm, from the outer edge of the first conductive region, and the edge of the third conductive region is a region having a distance of 10mm or less, such as 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm or 10mm, from the outer edge of the third conductive region.

In the invention, in the first conductive layer, the area which is more than 10mm away from the outer edge of the first conductive area is an inner area, for example, 15mm, 20mm, 25mm, 30mm, 40mm, 50mm or 60mm, and the like, and the second conductive area is partially or completely positioned in the inner area, so that the second conductive area can be arranged in a larger area, and specific patterns can be arranged according to specific product requirements, thereby playing the roles of improving color change speed and enriching appearance effect.

Preferably, an edge of the first conductive region is a region having a distance of 20mm or less, for example, 1mm, 5mm, 10mm, 15mm, 20mm, or the like from an outer edge of the first conductive region, and an edge of the third conductive region is a region having a distance of 20mm or less, for example, 1mm, 5mm, 10mm, 15mm, 20mm, or the like from an outer edge of the third conductive region.

In the invention, in the first conductive layer, the area which is more than 20mm away from the outer edge of the first conductive area is an inner area, and the second conductive area is partially or completely positioned in the inner area, so that the second conductive area can be arranged in a larger area, and a specific pattern can be arranged according to specific product requirements, and the pattern is more centered, thereby playing the roles of improving the color change speed and emphasizing the appearance effect.

Preferably, the first and second conductive regions are different in color.

Preferably, the third conductive region and the fourth conductive region are different in color.

According to the invention, the color difference value which can be distinguished by human eyes is formed between the first conductive area and the second conductive area, and the second conductive area is designed into the preset pattern, so that abundant appearance visual experience can be realized, and in this situation, a shielding layer is not required to be arranged in the prior art. Furthermore, the third conductive area and the fourth conductive area have color difference values which can be distinguished by human eyes, and the fourth conductive area is designed into the preset pattern, so that abundant appearance visual experience can be achieved, and in this situation, a shielding layer does not need to be arranged in the prior art.

Preferably, the second conductive region has the same color as the electrochromic layer at a preset transmittance.

In the invention, the transmittance of the electrochromic layer is changed under the action of an external voltage, when the transmittance is changed to the preset transmittance, the color of the second conductive area is the same as that of the electrochromic layer under the preset transmittance, and when a user watches from the outer side of the electrochromic device, the pattern of the second conductive area is fused in the ground color of the electrochromic layer, so that the user cannot see the pattern of the second conductive area; when the transmittance is not at the preset transmittance, the pattern of the second conductive region may be distinguished from the ground color of the electrochromic layer, and the user may see the pattern of the second conductive region. The electrochromic layer may be adjusted according to the color of the second conductive region, and when the color of the second conductive region is merged into the base color of the electrochromic layer, the transmittance of the electrochromic layer is the preset transmittance.

Preferably, the fourth conductive region has the same color as the electrochromic layer at the preset transmittance.

In the invention, the transmittance of the electrochromic layer is changed under the action of an external voltage, when the transmittance is changed to the preset transmittance, the color of the fourth conductive area is the same as that of the electrochromic layer under the preset transmittance, and when a user watches from the outside of the electrochromic device, the pattern of the fourth conductive area is fused in the ground color of the electrochromic layer, so that the user cannot see the pattern of the fourth conductive area; when the transmittance is not at the preset transmittance, the pattern of the fourth conductive region may be distinguished from the ground color of the electrochromic layer, and the user may see the pattern of the fourth conductive region. The electrochromic layer may be adjusted according to a color of the fourth conductive area, and when the color of the fourth conductive area is blended into the base color of the electrochromic layer, the transmittance of the electrochromic layer is the preset transmittance.

Preferably, the electrochromic device further comprises a color layer;

preferably, the color layer is located on the outer side of the second substrate layer;

preferably, the color of the color layer is the same as the color of the second conductive region.

In the invention, the electrochromic layer is usually switched between a transparent state and a coloring state with different transmittances, the color layer can be used as the ground color of the electrochromic device, and when a user watches from the outer side of the first substrate layer, the color layer can be superposed with the color of the electrochromic layer, so that the watching effect of the electrochromic device is enriched.

When the color layer and the second conductive area are the same in color, when the electrochromic layer is switched to be transparent, the pattern of the second conductive area is fused in the ground color of the color layer, and a user cannot see the pattern of the second conductive area; when the electrochromic layer is switched to a non-transparent colored state, the color of the electrochromic layer is superposed with the base color of the color layer, the pattern of the second conductive area is displayed, and at the moment, the user can see the pattern of the second conductive area. Thereby greatly improving the interestingness of the pattern appearance of the electrochromic device.

Preferably, the second conductive region has a higher electrical conductivity than the first conductive region.

In the invention, the conductivity of the second conductive area is higher than that of the first conductive area, and at least part of the second conductive area is positioned in the non-edge area of the first conductive layer, so that the color change speed of the central area of the electrochromic device can be greatly improved, and the time required for the electrochromic device to complete the whole color change is reduced.

Preferably, the fourth conductive region has a higher conductivity than the third conductive region.

In the invention, the conductivity of the fourth conductive area is higher than that of the third conductive area, and at least part of the fourth conductive area is positioned in the non-edge area of the second conductive layer, so that the color change speed of the central area of the electrochromic device can be greatly improved, and the time required for the electrochromic device to complete the whole color change is reduced.

Preferably, the materials of the first and third conductive regions each independently comprise any one of indium tin oxide, zinc aluminum oxide, fluorine-doped tin oxide, silver nanowires, graphene, carbon nanotubes, metal grids, or silver nanoparticles, or a combination of at least two thereof.

Preferably, the materials of the second conductive region and the fourth conductive region each independently include any one of conductive silver paste, conductive copper paste, conductive carbon paste, conductive ink, copper foil, copper wire, or conductive adhesive film, or a combination of at least two of the foregoing.

In the invention, the first conductive area and the third conductive area are made of transparent conductive materials, the second conductive area and the fourth conductive area are made of materials with certain colors, so that a very obvious macroscopic color difference value is formed between the two conductive areas, and the second conductive area and/or the fourth conductive area can be set into a preset pattern, so that when a user watches from the outside, a rich appearance effect can be seen. And the conductivity of the materials of the second conductive area and the fourth conductive area is higher, so that the surface resistance of the first conductive layer/the second conductive layer is greatly reduced, the color change speed of the electrochromic device can be improved, the color change speed in the electrochromic device is improved, and the color change uniformity of the whole device is improved.

Preferably, the materials of the first and second substrate layers each independently comprise transparent glass and/or a polymeric material.

Preferably, the polymeric material comprises a flexible material.

Preferably, the flexible material comprises any one of polyethylene terephthalate, cyclic olefin copolymer or cellulose triacetate, or a combination of at least two thereof.

Preferably, the maximum width of the second and fourth conductive areas is greater than 5mm, such as 5mm, 10mm, 15mm, 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 30mm, 35mm, 40mm, etc., preferably greater than 20mm.

The width value defined by the present invention is the width corresponding to the second and fourth conductive regions, and there will be a maximum width value regardless of the shape.

In the invention, the maximum width value is in the range, which is beneficial to reducing the surface resistance of the non-edge area of the second conductive area and/or the fourth conductive area as much as possible, and is convenient for design of patterns, the visual impression of a user is strong, the effect of reducing the surface resistance of the non-edge area is limited on the aspect that the maximum width is too small, and the pattern design is not easy on the other hand.

Preferably, the type of electrochromic layer comprises any one of PDLC, SPD or EC or a combination of at least two thereof.

Preferably, the EC includes a color-change material layer, an electrolyte layer, and a counter electrode layer, which are sequentially stacked.

Preferably, the second conductive region is completely embedded in the first conductive region, partially embedded in the first conductive region, or located at a surface of the first conductive region.

Preferably, the fourth conductive region is completely embedded in the third conductive region, partially embedded in the third conductive region, or located at a surface of the third conductive region.

Preferably, at least one extraction electrode is connected to the second conductive region and/or at least one extraction electrode is connected to the fourth conductive region.

In the invention, the extraction electrode is connected with an external power supply, so that the voltage of the electrochromic layer is controlled by extraction, and the electrochromic layer has different transmittances under different voltages.

Preferably, on the surface of the first substrate layer, a projection of the second conductive region and a projection of the fourth conductive region do not overlap, partially overlap or completely overlap each other.

In the invention, the rich appearance effect is realized by adjusting the position relation of the second conductive area and the fourth conductive area.

In a second aspect, the present invention also provides an electronic terminal, including the above electrochromic device.

Exemplarily, a preparation method of the electrochromic device is provided, and the preparation method specifically includes the following steps:

1. forming a first conductive layer on the first base layer: forming a first conductive region on the first substrate layer by magnetron sputtering (or vacuum evaporation deposition, sol-gel, chemical vapor deposition, etc.); attaching a second conductive material to a preset area of the first conductive layer through a conductive adhesive to form a second conductive area;

forming a second conductive layer on the second base layer by the same method;

2. coating an electrochromic layer on the first conductive layer: dissolving 500mg of poly (3-hexylthiophene) (P3 HT) in 10mL of o-xylene, magnetically stirring for 10h, then dripping the obtained solution onto the first conductive layer, and spin-coating to form a color-changing material layer;

3. coating a counter electrode layer on the second conductive layer: dissolving 500mg of tungsten trioxide in 20mL of deionized water, stirring and filtering, then dripping the obtained solution on a second conductive layer, and performing spin coating to form a tungsten trioxide coating to obtain a counter electrode layer;

4. preparing an electrochromic device: mixing 20wt% of lithium perchlorate, 59.9wt% of methyl methacrylate, 20wt% of propylene carbonate and 0.1wt% of azobisisobutyronitrile, and coating the mixture on the counter electrode layer to form an electrolyte coating; then covering the color-changing material layer (together with the first substrate layer) on the electrolyte coating, and carrying out ultraviolet curing to enable the electrolyte coating to form an all-solid-state electrolyte layer; finally obtaining the electrochromic device.

Compared with the prior art, the invention has the following beneficial effects:

according to the electrochromic device provided by the invention, the new conductive area with different conductivity is added on the basis of the original conductive area, and at least part of the new conductive area is positioned in the non-edge area of the original conductive area, so that the color change speed of the central area of the electrochromic device can be greatly improved, an edge bus bar is not additionally arranged, an edge shielding layer is not required to be arranged, the production process is greatly simplified, and the production cost is reduced.

Drawings

Fig. 1 is a schematic structural diagram of an electrochromic device provided in example 1.

Fig. 2 is a schematic view of the first conductive layer in embodiment 1.

Fig. 3 is a schematic view of a second conductive layer in embodiment 1.

Fig. 4 is a schematic diagram of the effect of the electrochromic device provided in example 1.

Fig. 5 is a schematic structural diagram of an electrochromic device provided in example 2.

Fig. 6 is a schematic view of the first conductive layer in embodiment 2.

Fig. 7 is a schematic view of a second conductive layer in embodiment 2.

Fig. 8 is a schematic view of the effect of the electrochromic device provided in example 2.

Fig. 9 is a schematic structural diagram of an electrochromic device provided in example 3.

Fig. 10 is a schematic view of a first conductive layer in embodiment 3.

Fig. 11 is a schematic view of a second conductive layer in embodiment 3.

Fig. 12 is a schematic structural view of an electrochromic device provided in example 4.

Fig. 13 is a schematic view of the first conductive layer in embodiment 4.

Fig. 14 is a schematic view of a second conductive layer in embodiment 4.

Fig. 15 is a schematic view of a part of the structure of an electrochromic device provided in example 5.

1-first substrate layer, 2-first conductive layer, 3-electrochromic layer, 4-second conductive layer, 5-second substrate layer, 6-terminal (second conductive region), 7-terminal (fourth conductive region), 8-color layer, 21-first conductive region, 22-second conductive region, 41-third conductive region, 42-fourth conductive region.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, wherein like reference numerals refer to like or similar parts or parts having like or similar functions throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "mounted" are to be construed broadly, e.g., as meaning both connected and disconnectable, mechanically and electrically, directly or indirectly via intermediate media, whether internal or external to the elements, or in any other relationship between the elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, unless otherwise explicitly specified or limited, the first feature "on" or "under" the second feature may include the first feature and the second feature being in direct contact, and may also include the first feature and the second feature not being in direct contact but being in contact via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical solution of the present invention is further described below by way of specific embodiments. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.

In one embodiment, the present invention provides an electrochromic device comprising a first substrate layer, a first conductive layer, an electrochromic layer, a second conductive layer, and a second substrate layer, which are sequentially stacked;

the first conductive layer comprises a first conductive area and a second conductive area, the second conductive area is not contacted with the edge of the first conductive area at least partially, and the conductivities of the first conductive area and the second conductive area are different;

and/or the presence of a gas in the gas,

the second conductive layer comprises a third conductive area and a fourth conductive area, the fourth conductive area is not contacted with the third conductive area at least partially, and the conductivity of the third conductive area is different from that of the fourth conductive area.

The edge of the first conductive area is an area which is less than or equal to 10mm away from the outer edge of the first conductive area, and the edge of the third conductive area is an area which is less than or equal to 10mm away from the outer edge of the third conductive area; further, an edge of the first conductive region is a region having a distance of 20mm or less from an outer edge of the first conductive region, and an edge of the third conductive region is a region having a distance of 20mm or less from an outer edge of the third conductive region.

The first conductive region and the second conductive region are different in color, and the third conductive region and the fourth conductive region are different in color.

The second conductive region has the same color as the electrochromic layer at the preset transmittance, and the fourth conductive region has the same color as the electrochromic layer at the preset transmittance.

Furthermore, the electrochromic device further comprises a color layer, the color layer is located on the outer side face of the second substrate layer, and the color of the color layer is the same as that of the second conductive area.

The materials of the first conductive region and the third conductive region respectively and independently comprise any one or a combination of at least two of indium tin oxide, zinc aluminum oxide, fluorine-doped tin oxide, silver nanowires, graphene, carbon nanotubes, metal grids or silver nanoparticles; the materials of the second conductive area and the fourth conductive area respectively and independently comprise any one or a combination of at least two of conductive silver paste, conductive copper paste, conductive carbon paste, conductive ink, copper foil, copper wire or conductive adhesive film; the materials of the first substrate layer and the second substrate layer respectively and independently comprise transparent glass and/or high polymer materials; the high polymer material comprises a flexible material; the flexible material comprises any one of polyethylene terephthalate, cyclic olefin copolymer or cellulose triacetate or a combination of at least two of the materials.

The second conductive region has a higher conductivity than the first conductive region; the fourth conductive region has a higher conductivity than the third conductive region.

The type of the electrochromic layer comprises any one of PDLC, SPD or EC or a combination of at least two of PDLC, SPD or EC; the EC comprises a color-changing material layer, an electrolyte layer and a counter electrode layer which are sequentially stacked.

The thicknesses of the first conductive layer and the second conductive layer are each independently 0.1 to 10 μm; the maximum width of the second and fourth conductive areas is greater than 5mm.

The second conductive region is completely embedded in the first conductive region, partially embedded in the first conductive region or positioned on the surface of the first conductive region; the fourth conductive region is completely embedded in the third conductive region, partially embedded in the third conductive region, or located at a surface of the third conductive region.

The second conductive area is connected with at least one extraction electrode, the fourth conductive area is connected with at least one extraction electrode, and the extraction electrode is connected with an external power supply.

On the surface of the first substrate layer, the projection of the second conductive region and the projection of the fourth conductive region do not overlap, partially overlap or completely overlap.

Example 1

The present embodiment provides an electrochromic device, based on the electrochromic device provided in the specific embodiment:

as shown in fig. 1, 2, 3 and 4, the electrochromic device includes a first substrate layer 1, a first conductive layer 2, an electrochromic layer 3, a second conductive layer 4 and a second substrate layer 5, which are sequentially stacked, wherein the first substrate layer 1 is made of PET (polyethylene terephthalate), the second substrate layer 5 is made of PET, and the electrochromic layer 3 is EC;

the material of the first conductive region 21 is indium tin oxide, the material of the second conductive region 22 is copper, the second conductive region 22 is completely embedded in the first conductive region 21, the maximum width is 20mm, as shown in fig. 2 and 4, the region 10mm from the outer edge of the first conductive region 21 is the edge of the first conductive region 21, the end 6 (the second conductive region 22) is in contact with the edge of the first conductive region 21, and other parts (such as the tree-shaped leaf crown and the upper part of the trunk in fig. 2) of the second conductive region 22 are not in contact with the edge of the first conductive region 21; a first extraction electrode is connected to the end 6 (second conductive region 22);

the material of the third conductive region 41 is indium tin oxide, the material of the fourth conductive region 42 is copper, the fourth conductive region 42 is completely embedded in the third conductive region 41, the maximum width is 20mm, as shown in fig. 3 and 4, a region 10mm away from the outer edge of the third conductive region 41 is the edge of the third conductive region 41, the end 7 (the fourth conductive region 42) is in contact with the edge of the third conductive region 41, and other parts (such as the tree-shaped leaf crown and the upper part of the trunk in fig. 3) of the fourth conductive region 42 are not in contact with the edge of the third conductive region 41; a second extraction electrode is connected to the end 7 (fourth conductive region 42);

as shown in fig. 4, on the surface of the first substrate layer 1, a projection of the second conductive area 22 and a projection of the fourth conductive area 42 partially overlap. An external power supply applies voltage to the electrochromic layer 3 by connecting the first extraction electrode and the second extraction electrode, so that ions are removed/embedded from the electrochromic material layer, shuttle in the electrolyte layer, and are embedded/removed from the counter electrode layer, so that the transmittance of the electrochromic material layer is changed, and then the electrochromic layer 3 is switched in different transmittance states. By respectively arranging the second conductive area 22 and the fourth conductive area 42 on the first conductive layer 2 and the second conductive layer 4, the conductivity of copper materials of the second conductive area 22 and the fourth conductive area 42 is far greater than that of indium tin oxide, so that the surface resistance of the first conductive layer 2 and the second conductive layer 4 is greatly reduced, the color change speed of the central area of the electrochromic device is greatly improved, the integral color change speed of the electrochromic device is greatly improved, and the required time for the integral color change of the electrochromic device to be uniform is reduced.

The appearance effect of the present embodiment is described below, referring to fig. 4, taking as an example that the transmittance of the electrochromic layer 3 varies from 10% to 70% using a blue electrochromic material, when a user looks from the outside of the first substrate layer 1, and when the transmittance is 70%, the user can see that there are two yellow trees (corresponding to the pattern shapes of the second conductive areas 22 and the fourth conductive areas 42) on an almost transparent and colorless substrate (such as the areas other than the tree structure in fig. 4); when the transmittance is 10%, the user can see on the blue substrate, a tree of yellow (corresponding to the pattern shape of the second conductive regions 22), and a tree of bluish green (corresponding to the pattern shape of the fourth conductive regions 42), where the bluish green is a color obtained by superimposing the blue of the electrochromic layer 3 and the yellow of the material of the fourth conductive regions.

Example 2

The present embodiment provides an electrochromic device, based on the electrochromic device provided in the specific embodiment:

as shown in fig. 5, 6, 7 and 8, the electrochromic device includes a first substrate layer 1, a first conductive layer 2, an electrochromic layer 3, a second conductive layer 4 and a second substrate layer 5 which are sequentially stacked, the first substrate layer 1 is made of PET (polyethylene terephthalate), the second substrate layer 5 is made of PET, and the electrochromic layer 3 is PDLC;

the material of the first conductive region 21 is fluorine-doped tin oxide, the material of the second conductive region 22 is a conductive adhesive film, the second conductive region 22 is completely embedded in the first conductive region 21, the maximum width is 30mm, as shown in fig. 6 and 8, the region 10mm away from the outer edge of the first conductive region 21 is the edge of the first conductive region 21, the terminal 6 (the second conductive region 22) is in contact with the edge of the first conductive region 21, and other parts (such as the tree-shaped leaf crown and trunk in fig. 6) of the second conductive region 22 are not in contact with the edge of the first conductive region 21; a first extraction electrode is connected to the end 6 (second conductive region 22);

the third conductive region 41 is made of fluorine-doped tin oxide, the fourth conductive region 42 is made of a conductive adhesive film, the fourth conductive region 42 is completely embedded in the third conductive region 41 and has a maximum width of 30mm, as shown in fig. 7 and 8, a region 10mm away from the outer edge of the third conductive region 41 is an edge of the third conductive region 41, the end 7 (the fourth conductive region 42) is in contact with the edge of the third conductive region 41, and other parts (such as the diamond shape and the part where the diamond shape extends out in fig. 7) of the fourth conductive region 42 are not in contact with the edge of the third conductive region 41; a second extraction electrode is connected to the end 7 (fourth conductive region 42);

on the surface of the first substrate layer 1, the projection of the second conductive area 22 and the projection of the fourth conductive area 42 do not overlap.

The control method of the electrochromic device comprises the following steps:

an external power supply applies voltage to the electrochromic layer 3 by connecting the first extraction electrode and the second extraction electrode, so that ions are extracted/embedded from the electrochromic material layer, shuttle in the electrolyte layer, and are embedded/extracted from the counter electrode layer, so that the transmittance of the electrochromic material layer is changed, and then the electrochromic layer 3 is switched under different transmittance states. The second conductive area 22 and the fourth conductive area 42 are respectively arranged on the first conductive layer 2 and the second conductive layer 4, and the conductivity of the conductive adhesive films made of the second conductive area 22 and the fourth conductive area 42 is far greater than that of fluorine-doped tin oxide, so that the surface resistance of the first conductive layer 2 and the second conductive area 4 is greatly reduced, the color changing speed of the central area of the electrochromic device is greatly improved, the integral color changing speed of the electrochromic device is greatly improved, the required time for the integral color changing of the electrochromic device to be uniform is reduced, and meanwhile, the second conductive area 22 and the fourth conductive area 42 are different patterns, so that different aesthetic effects are presented.

Example 3

The present embodiment provides an electrochromic device, based on the electrochromic device provided in the specific embodiment:

as shown in fig. 9, 10 and 11, the electrochromic device includes a first substrate layer 1, a first conductive layer 2, an electrochromic layer 3, a second conductive layer 4, a second substrate layer 5 and a color layer 8, which are sequentially stacked, wherein the first substrate layer 1 is made of PET, and the second substrate layer 5 is made of PDLC, which is a type of PET electrochromic layer 3; the color of the color layer 8 is consistent with that of the second conductive area 22;

the first conductive region 21 is made of fluorine-doped tin oxide, the second conductive region 22 is made of conductive copper foil, the second conductive region 22 is completely embedded into the first conductive region 21, and the maximum width is 50mm; as shown in fig. 10, an area 20mm from the outer edge of the first conductive area 21 is the edge of the first conductive area 21, the pattern shape of the second conductive area 22 is "a" shape, both ends of the bottom of the "a" shape are in contact with the edge of the first conductive area 21, and the other part of the second conductive area 22 (including the upper part of the "a" shape of the pattern shape) is not in contact with the edge of the first conductive area 21; the first extraction electrode may be extracted from one end of the bottom of the "a" shape. Only the third conductive region 41 is formed on the second conductive layer 4, the material of the third conductive region 41 is indium tin oxide, and the second extraction electrode is directly extracted from the edge of the third conductive region 41.

An external power supply applies voltage to the electrochromic layer 3 by connecting the first extraction electrode and the second extraction electrode, so that ions are extracted/embedded from the electrochromic material layer, shuttle in the electrolyte layer, and are embedded/extracted from the counter electrode layer, so that the transmittance of the electrochromic material layer is changed, and then the electrochromic layer 3 is switched under different transmittance states. By arranging the second conductive area 22 on the first conductive layer 2, the conductivity of copper, which is a material of the second conductive area 22, is far greater than that of indium tin oxide, so that the surface resistance of the first conductive layer 2 is greatly reduced, the color change speed of the central area of the electrochromic device is greatly improved, the overall color change speed of the electrochromic device is greatly improved, and the required time for the overall color change of the electrochromic device to be uniform is reduced.

The appearance effect of the present embodiment is described below, taking an example that the transmittance of the electrochromic layer 3 varies from 10% to 70% by using a blue electrochromic material, when the user looks from the outside of the first substrate layer 1, and when the transmittance is 70%, the electrochromic layer 3 is almost colorless and transparent, and the user can see the integral yellow color of the electrochromic device, at this time, the "a" type pattern of the second conductive area 22 can hardly be seen, and since the color layer 8 is yellow, the "a" type material of the second conductive area 22 is also yellow; when the transmittance is 10%, the color of the electrochromic layer 3 is blue, and a user can see that a pattern of an "a" shape is presented on the base color of blue-green, which is a color obtained by superimposing the blue color of the electrochromic layer 3 and the yellow color of the color layer 8. And abundant appearance visual effects can be realized through the matching of the color of the second conductive layer 4 and the color of the substrate layer.

Example 4

The present embodiment provides an electrochromic device, based on the electrochromic device provided in the specific embodiment:

as shown in fig. 12, 13 and 14, the electrochromic device includes a first substrate layer 1, a first conductive layer 2, an electrochromic layer 3, a second conductive layer 4 and a second substrate layer 5, which are sequentially stacked, wherein the first substrate layer 1 is made of PET, and the electrochromic layer 3 is EC;

as shown in fig. 13, only the first conductive region 21 is formed on the first conductive layer 2, the material of the first conductive region 21 is ito, and the first lead-out electrode is directly led out from the edge of the first conductive region 21. As shown in fig. 14, on the second conductive layer 4, a region 20mm away from the outer edge of the third conductive region 41 is an edge of the third conductive region 41, the material of the third conductive region 41 is indium tin oxide, the material of the fourth conductive region 42 is copper, the pattern shape of the fourth conductive region 42 in this embodiment is an "a" shape, two ends of the bottom of the "a" shape are in contact with the edge of the third conductive region 41, and the other part (including the upper part of the pattern shape "a") of the fourth conductive region 42 is not in contact with the edge of the third conductive region 41; the second extraction electrode may be extracted from one end of the bottom of the "a" shape. The fourth conductive area 42 is completely embedded in the third conductive area 41 with a maximum width of 30mm.

An external power supply applies voltage to the electrochromic layer 3 by connecting the first extraction electrode and the second extraction electrode, so that ions are extracted/embedded from the electrochromic material layer, shuttle in the electrolyte layer, and are embedded/extracted from the counter electrode layer, so that the transmittance of the electrochromic material layer is changed, and then the electrochromic layer 3 is switched under different transmittance states. By providing the fourth conductive region 42 on the second conductive layer 4, since the conductivity of the copper material of the second conductive region 22 is much greater than that of indium tin oxide, the surface resistance of the second conductive layer 4 is greatly reduced, so as to greatly improve the color changing speed of the central region of the electrochromic device, greatly improve the overall color changing speed of the electrochromic device, and reduce the time required for the overall color changing of the electrochromic device to be uniform.

The appearance effect of the embodiment is described below, taking the example that the transmittance of the electrochromic layer 3 varies from 10% to 70% by using the yellow electrochromic material, when the transmittance is 70%, the electrochromic layer 3 is almost colorless and transparent, and the user can see a yellow "a" pattern when looking from the outside of the first substrate layer 1; when the transmittance is 10%, the electrochromic device is entirely yellow, and at this time, the "a" type pattern of the second conductive regions 22 is hardly visible, and since the color of the electrochromic layer 3 is yellow, the "a" type material of the second conductive regions 22 is also yellow. And abundant appearance visual effects can be realized through the matching of the colors of the second conducting layer 4 and the electrochromic layer 3.

In other embodiments, a second conductive region having a color consistent with that of the electrochromic layer may be further provided in the first conductive layer, and the effects described in this embodiment may also be achieved.

Example 5

The present embodiment provides an electrochromic device, based on the electrochromic device provided in the specific embodiment:

as shown in fig. 15, in the first conductive layer 2 of the electrochromic device, the second conductive region 22 is located on the surface of the first conductive region 21.

Similarly, in the second conductive layer 4 of the electrochromic device, the fourth conductive region 42 may also be located on the surface of the third conductive region 41.

In the foregoing embodiments 1 to 4, the first conductive layer 2 and/or the second conductive layer 4 as in the present embodiment may also be employed.

It can be seen from the above embodiments that the electrochromic device provided by the invention can realize diversified patterns and colors, and can present different appearance effects; and through increasing the new conductive area that the conductivity is different on the basis of original conductive area, new conductive area is at least partially in the non-marginal zone of original conductive area to can improve the discolour speed of electrochromic device central zone greatly, and no longer set up the edge busbar in addition, and then need not to set up the edge shielding layer, simplified production technology greatly, reduction in production cost.

The applicant declares that the above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be understood by those skilled in the art that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are within the scope and disclosure of the present invention.

Claims (10)

1. An electrochromic device is characterized by comprising a first substrate layer, a first conducting layer, an electrochromic layer, a second conducting layer and a second substrate layer which are sequentially stacked;

the first conductive layer comprises a first conductive region and a second conductive region, the second conductive region is at least partially not in contact with the edge of the first conductive region, and the first conductive region and the second conductive region have different conductivities;

and/or the presence of a gas in the gas,

the second conductive layer comprises a third conductive area and a fourth conductive area, the fourth conductive area and the third conductive area are at least partially not contacted with each other, and the third conductive area and the fourth conductive area have different conductivities.

2. The electrochromic device according to claim 1, wherein an edge of the first conductive region is a region having a distance of 10mm or less from an outer edge of the first conductive region, and an edge of the third conductive region is a region having a distance of 10mm or less from an outer edge of the third conductive region;

preferably, an edge of the first conductive region is a region having a distance of 20mm or less from an outer edge of the first conductive region, and an edge of the third conductive region is a region having a distance of 20mm or less from an outer edge of the third conductive region.

3. The electrochromic device according to claim 1 or 2, characterized in that the first and second electrically conductive areas are of different colors;

preferably, the third conductive region and the fourth conductive region are different in color.

4. The electrochromic device according to any of claims 1 to 3, characterized in that the color of the second electrically conductive areas is the same as the color of the electrochromic layer at a preset transmittance;

preferably, the fourth conductive region has the same color as the electrochromic layer at the preset transmittance.

5. The electrochromic device according to any one of claims 1 to 4, characterized in that it further comprises a color layer;

preferably, the color layer is located on the outer side of the second substrate layer;

preferably, the color of the color layer is the same as the color of the second conductive region.

6. The electrochromic device according to any of claims 1-5, characterized in that the second conductive region has a higher electrical conductivity than the first conductive region;

preferably, the conductivity of the fourth conductive region is higher than the conductivity of the third conductive region;

preferably, the materials of the first and third conductive regions each independently comprise any one or a combination of at least two of indium tin oxide, zinc aluminum oxide, fluorine-doped tin oxide, silver nanowires, graphene, carbon nanotubes, metal grids, or silver nanoparticles;

preferably, the materials of the second conductive region and the fourth conductive region each independently include any one of or a combination of at least two of conductive silver paste, conductive copper paste, conductive carbon paste, conductive ink, copper foil, copper wire and conductive adhesive film;

preferably, the materials of the first and second substrate layers each independently comprise transparent glass and/or a polymeric material;

preferably, the polymeric material comprises a flexible material;

preferably, the flexible material comprises any one of or a combination of at least two of polyethylene terephthalate, cyclic olefin copolymer or cellulose triacetate;

preferably, the type of electrochromic layer comprises PDLC, SPD or EC;

preferably, the EC includes a color-change material layer, an electrolyte layer, and a counter electrode layer, which are sequentially stacked.

7. Electrochromic device according to any of claims 1-6, characterised in that the maximum width of the second electrically conductive area is greater than 5mm, preferably greater than 20mm;

preferably, the maximum width of the fourth conductive area is greater than 5mm, preferably greater than 20mm.

8. The electrochromic device according to any one of claims 1 to 7, characterized in that the second conductive region is completely embedded in the first conductive region, partially embedded in the first conductive region or located at the surface of the first conductive region;

preferably, the fourth conductive region is completely embedded in the third conductive region, partially embedded in the third conductive region, or located at a surface of the third conductive region.

9. Electrochromic device according to any of claims 1-8, characterised in that at least one extraction electrode is connected to the second electrically conductive area and/or at least one extraction electrode is connected to the fourth electrically conductive area;

preferably, on the surface of the first substrate layer, a projection of the second conductive region and a projection of the fourth conductive region do not overlap, partially overlap or completely overlap each other.

10. An electronic terminal, characterized in that it comprises an electrochromic device according to any one of claims 1-9.

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