An electrochromic device and an electronic device

Abstract

The present invention provides an electrochromic device and an electronic device. The electrochromic device includes a first base layer, a first conductive layer, an electrochromic layer, a second conductive layer, and a second base layer that are sequentially stacked; the surface resistance of the first conductive layer is greater than that of the second conductive layer. The electrochromic device of the present invention realizes the distinct display of the color of the electrochromic layer and the effects of fast and uniform color change through the matching of the first conductive layer with a relatively high surface resistance and the second conductive layer with a relatively low surface resistance.

Description

Technical Field

[0001] The present invention belongs to the technical field of electrochromism, and relates to an electrochromic device and an electronic device. Background Art

[0002] Electrochromic devices have very wide applications in the fields of automobiles, buildings, and consumer electronics.

[0003] An electrochromic device usually consists of a stacked first base layer, a first conductive layer, an electrochromic layer, a second conductive layer, and a second base layer. Under the action of an applied electric field, the material of the electrochromic layer undergoes a reversible oxidation-reduction reaction, and the optical properties of the electrochromic device exhibit stable and reversible color or transmittance changes. In some application scenarios, such as housing decoration, users tend to see bright colors. Taking the side of the first base layer facing the user's eyes as an example, ambient light passes through the electrochromic device and is then reflected from each interface of the electrochromic device. The user senses the color or transmittance change of the electrochromic device through the change in the received reflected light. Therefore, the color generated by the electrochromic layer is not directly presented in front of the user's eyes but is sandwiched between several structural layers. The color display effect of the electrochromic device is weakened, and the visual effect needs to be improved. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide an electrochromic device and an electronic device, and the present invention is beneficial to improving the color display effect of the electrochromic device.

[0005] To achieve the purpose of this invention, the following technical solutions are adopted:

[0006] In a first aspect, the present invention provides an electrochromic device, including a first base layer, a first conductive layer, an electrochromic layer, a second conductive layer, and a second base layer stacked in sequence; the surface resistance of the first conductive layer is greater than that of the second conductive layer.

[0007] Among them, the materials of the first base layer and the second base layer include polyethylene terephthalate (PET), cycloolefin copolymer, cellulose triacetate or glass. The material of the electrochromic layer can change color or transmittance under the action of an external voltage, including types such as PDLC (Polymer Dispersed Liquid Crystal) glass, SPD (Suspended Particle Device), and EC (Electrochromic). The conductive materials of the first conductive layer and the second conductive layer are formed by one or at least two of ITO (indium tin oxide), aluminum zinc oxide, fluorine-doped tin oxide, silver nanowires, graphene, carbon nanotubes, metal grids, and silver nanoparticles. For the case where the conductive materials of the first conductive layer and the second conductive layer are the same, the larger the surface resistance, the smaller the thickness of the conductive material, and the higher the light transmittance of the conductive layer.

[0008] In the present invention, the surface resistance of the first conductive layer is set to be relatively large, and the surface resistance of the second conductive layer is set to be relatively small, which can ensure that the light transmittance of the first conductive layer is relatively high. When the user views from the side of the first base layer, there is a good color display effect of the electrochromic layer. At the same time, the surface resistance of the second conductive layer is small, avoiding the reduction of the color change rate and color change uniformity of the electrochromic layer caused by too large a surface resistance. Therefore, through the matching of the first conductive layer with a relatively high surface resistance and the second conductive layer with a relatively low surface resistance, the present invention synergistically realizes the distinct display of the color of the electrochromic layer and the effects of fast and uniform color change of the electrochromic device.

[0009] Preferably, a first bus bar is provided on the first conductive layer, and the first bus bar is not in contact with the electrochromic layer.

[0010] Since the surface resistance of the first conductive layer is relatively large, a first bus bar needs to be provided on the first conductive layer. The first bus bar is used to improve the voltage distribution uniformity of the first conductive layer. The first bus bar is arranged along the periphery of the electrochromic device, thereby improving the color change speed and color change uniformity of the electrochromic device. The first bus bar is not in contact with the electrochromic layer, thereby avoiding the metal of the first bus bar participating in the redox reaction of the electrochromic device. When the surface of the material of the first bus bar is passivated or covered with an insulating layer, etc., the first bus bar and the electrochromic layer can also be in contact. Since the surface resistance of the second conductive layer is small, there is no need to provide a bus bar on the second conductive layer. On the one hand, it can save product costs; on the other hand, in the direction from the first conductive layer to the second conductive layer, since there is no second bus bar, there will be no problem of short-circuit failure caused by the upper and lower contact of the first bus bar and the second bus bar. Through this design, the present invention greatly improves the product reliability, color change speed, and color change uniformity of the electrochromic device.

[0011] Preferably, the ratio of the sheet resistance of the first conductive layer to the sheet resistance of the second conductive layer is greater than or equal to 1.5. For example, it can be 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 6, 7, 8, 9, 10, 15, or 20, but is not limited to the listed values, and other unlisted values within the numerical range are equally applicable. Under the above sheet resistance range, it has a better synergistic effect of clearly displaying the color of the electrochromic layer and achieving fast and uniform color change of the electrochromic device.

[0012] Preferably, the electrochromic layer includes a color-changing material layer, a solid electrolyte layer, and an ion storage layer stacked in sequence, and the color-changing material layer is located on the side close to the first conductive layer.

[0013] Specifically, the material of the color-changing material layer can be selected from color-changing materials that can form solid thin films in the prior art, such as NiO in inorganic materials, WO 3 , Nb 2 O 5 , TiO 2 etc.; polythiophene derivatives and copolymer systems in organic materials; metal conjugate systems, such as Prussian blue, etc. The solid electrolyte layer is formed by curing an electrolyte solution, and the material of the electrolyte layer is composed of a polymer, a metal ion salt, and an additive. The material of the ion storage layer includes metal oxides formed by one or at least two metal elements in Groups 4-12, or mixtures of metal oxides, or metal oxides doped with any other metal oxides. Since the color of the electrochromic layer is mainly determined by the color-changing material layer, in the present invention, by setting the color-changing material layer on the side close to the first conductive layer, when the user views from the outside of the first conductive layer, the color display effect of the electrochromic device is better.

[0014] Preferably, the thickness of the color-changing material layer is 1 nm - 10 μm, for example, it can be 1 nm, 5 nm, 10 nm, 50 nm, 80 nm, 100 nm, 200 nm, 500 nm, 1 μm, 5 μm, 10 μm, etc. Appropriately increasing the thickness of the color-changing material layer is beneficial to deepening the color effect of the electrochromic device.

[0015] Preferably, the thickness of the solid electrolyte layer is 5 - 200 μm; for example, it can be 5 μm, 10 μm, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, 110 μm, 120 μm, 130 μm, 150 μm, 160 μm, 180 μm, or 200 μm, etc.

[0016] Preferably, the thickness of the ion storage layer is 1 nm - 10 μm, and for example, it can be 1 nm, 5 nm, 10 nm, 50 nm, 80 nm, 100 nm, 200 nm, 500 nm, 1 μm, 5 μm, 10 μm, etc.

[0017] Preferably, the first conductive layer is made of a conductive material. The first conductive layer includes a first region and a second region. The conductive material on the side of the second region adjacent to the first region lacks a first width to form a first partition region;

[0018] The second region is connected to the second conductive layer through a conductive member;

[0019] The first region is connected to a first lead electrode, and the second region is connected to a second lead electrode;

[0020] The color-changing material layer is provided with a second partition area, which divides the color-changing material layer into two non-connected regions. The projection of the second partition area on the first conductive layer at least partially coincides with the first partition area. In the present invention, by providing the first partition area on the first conductive layer, the first conductive layer is divided into two mutually partitioned regions, and the conductive materials in the first region and the second region are not electrically connected to each other. Then, a first lead electrode is led out from the first region, and a second lead electrode is led out from the second region, so that both the first lead electrode and the second lead electrode are led out from the first conductive layer of the electrochromic device. In this way, a flexible circuit board integrating two lead lines can be used during welding, and a single hot press welding can be performed from one side of the first conductive layer of the electrochromic device to simultaneously realize the welding and leading out of the first lead electrode and the second lead electrode, greatly simplifying the production process, improving the production efficiency, and being beneficial to minimizing the area of the electrode leading-out region where color change (i.e., color / transmittance change) cannot occur as much as possible, further enhancing the display effect of the appearance color. At least a part of the side surface of the conductive member in the present invention is in contact with the electrochromic layer, so that there is no material vacancy of the electrochromic layer between the conductive member and the electrochromic layer, reducing the area of the non-color-changing region. It should be noted that the region lacking the material of the electrochromic layer will form a non-color-changing region. The inventors of the present invention have found that the material of the color-changing material layer has a tiny electronic conductivity under certain circumstances. Therefore, if the material of the color-changing material layer is filled into the first partition area, the conductive materials in the first region and the second region can still be conducted through the material of the color-changing material layer filled in the first partition area, resulting in the occurrence of internal micro-short circuits. In addition, the first partition area may also be filled with conductive particles during the process of processing, resulting in the occurrence of internal micro-short circuits. Therefore, in the present invention, by opening the second partition area on the color-changing material layer, the product stability and service life of the electrochromic device of the present invention are further improved. Therefore, the present invention greatly simplifies the production process, improves the production efficiency and product yield, and is beneficial to reducing the area of the non-color-changing region on the electrochromic device, further enhancing the display effect of the appearance color.

[0021] In a possible implementation manner, the second partition area is opened from the side of the color-changing material layer away from the first conductive layer;

[0022] In another possible implementation manner, the second partition area is opened from the side of the first conductive layer away from the color-changing material layer.

[0023] Preferably, the second partition area is filled with an electrolyte material same as the material of the solid electrolyte layer, so that the solid electrolyte layer contacts the first partition area through the electrolyte material in the second partition area.

[0024] The inventors of the present invention have found that the material of the solid electrolyte layer is an electronic insulator. Therefore, the present invention further fills the electrolyte material in the second partition area to further avoid the occurrence of internal micro-short circuits and further improve the product stability and service life of the electrochromic device of the present invention.

[0025] Preferably, one side of the first base layer away from the first conductive layer is connected to the first substrate layer through a first adhesive layer, and the first adhesive layer is made of a material having an ultraviolet blocking effect.

[0026] The first substrate layer of the present invention can be made of a flexible material and / or a rigid material. The rigid material can be selected from glass, hard plastic, etc., and the flexible material can include, but is not limited to, any one or at least two combinations of polyethylene terephthalate (PET), cycloolefin copolymer or cellulose triacetate. It is preferably a transparent material. By providing the first substrate layer, the protection of the electrochromic device can be improved, the mechanical structure strength of the electrochromic device can be increased, and further the intrusion of water oxygen and the like in the external environment from the first base layer can be avoided, thereby affecting the service life of the electrochromic device. Since long-term environmental ultraviolet irradiation will cause the adhesive layer to blister, by using an adhesive layer material that can block ultraviolet light for the first adhesive layer facing the environment side, the internal layer blistering of the electrochromic device can be avoided, thereby increasing the service life of the electrochromic device.

[0027] Optionally, one side of the second base layer away from the second conductive layer is connected to the second substrate layer through a second adhesive layer, so as to improve the protection of the electrochromic device, increase the mechanical structure strength of the electrochromic device, and further avoid the intrusion of water oxygen and the like in the external environment from the second base layer, thereby affecting the service life of the electrochromic device. In some other embodiments of the present invention, the incident light in the external environment can enter from both sides of the electrochromic device, and further the material of the second adhesive layer is set to an adhesive layer that can block ultraviolet light, so as to slow down the aging of the material of the solid electrolyte layer and increase the service life of the electrochromic device

[0028] Preferably, the distance from each point on the contour of the projection of the first conductive layer on the first substrate layer to the edge of the first substrate layer is greater than or equal to 0.1 mm.

[0029] In the present invention, the above-mentioned distance can be, for example, 0.1 mm, 0.2 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 15 mm, 20 mm or 30 mm, but is not limited to the listed values, and other unlisted values within the numerical range are equally applicable. Through the above structural design, the reliability of the electrochromic device can be greatly enhanced. The first conductive layer is shorter than the first substrate layer, so that there is no distribution of conductive material at the outermost edge of the first substrate layer, forming a blank area of conductive material. Subsequently, the conductive material of the first conductive layer can be completely wrapped within the seal, avoiding the influence of the conductive material exposed at the outermost edge of the first substrate layer on the reliability of the electrochromic device.

[0030] Preferably, the seal is disposed along the peripheral side of the electrochromic layer, and the projection of the outer side surface of the seal on the first substrate layer coincides with the outer periphery of the first substrate layer.

[0031] By providing a seal in the present invention, the peripheral side of the electrochromic layer can be sealed to prevent the intrusion of water vapor and the like, thereby improving the service life of the electrochromic device.

[0032] In a second aspect, the present invention provides an electronic device, including the above-mentioned electrochromic device, and the first substrate layer of the electrochromic device is close to the side where ambient light is incident.

[0033] In the electronic device of the present invention, the first substrate layer is disposed on the incident side close to ambient light. Through the matching of the first conductive layer with a relatively high surface resistance and the second conductive layer with a relatively low surface resistance, the electrochromic device can vividly display the color of the electrochromic layer and achieve the effects of fast and uniform color change, enabling the electronic device to have better color display effects, fast color change, and uniform color change effects.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] In the present invention, by setting the surface resistance of the first conductive layer to be relatively large and the surface resistance of the second conductive layer to be relatively small, it can be ensured that the light transmittance of the first conductive layer is relatively high, and when the user views from the side of the first substrate layer, there is a good color display effect of the electrochromic layer. At the same time, the surface resistance of the second conductive layer is relatively small, avoiding the reduction of the color change rate and color change uniformity of the electrochromic layer caused by excessive surface resistance. Through the matching of the first conductive layer with a relatively high surface resistance and the second conductive layer with a relatively low surface resistance, the electrochromic device can vividly display the color of the electrochromic layer and achieve the effects of fast and uniform color change. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 Schematic cross-sectional structure diagram of the electrochromic device provided in the first embodiment of the present invention;

[0037] Figure 2 Schematic cross-sectional structure diagram of the electrochromic device provided in the second embodiment of the present invention;

[0038] Figure 3 Schematic top view structure diagram of the electrochromic device provided in the third embodiment of the present invention;

[0039] Figure 4 Schematic cross-sectional structure diagram of the electrochromic device in the A-A cross-sectional direction provided in the third embodiment of the present invention;

[0040] Figure 5 Schematic cross-sectional structure diagram of the electrochromic device in the A-A cross-sectional direction provided in the fourth embodiment of the present invention;

[0041] Figure 6 Schematic structure diagram of the electronic device provided in the fifth embodiment of the present invention. Detailed implementation manners

[0042] The present invention will be further described in detail below in conjunction with the drawings and embodiments. It should be particularly noted that the following embodiments are only used to illustrate the present invention, but do not limit the scope of the present invention. Similarly, the following embodiments are only partial embodiments of the present invention rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0043] Referring to "embodiments" herein means that the specific features, structures, or characteristics described in conjunction with the embodiments can be included in at least one embodiment of the present application. The phrase appears in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0044] Embodiment 1

[0045] As Figure 1 shown, in this embodiment, an electrochromic device is proposed, which includes a first base layer 1, a first conductive layer 2, an electrochromic layer 3, a second conductive layer 4, and a second base layer 5 stacked in sequence; the surface resistance of the first conductive layer 2 is greater than that of the second conductive layer 4. The first base layer 1 is made of PET, the second base layer 5 is made of PET, the conductive materials of the first conductive layer 2 and the second conductive layer 4 are the same, which is ITO. The surface resistance of the first conductive layer 2 is 80 Ω, and the surface resistance of the second conductive layer 4 is 40 Ω.

[0046] In this embodiment, by setting the sheet resistance of the first conductive layer 2 to be relatively large and the sheet resistance of the second conductive layer 4 to be relatively small, it is possible to ensure that the light transmittance of the first conductive layer 2 is relatively high. When the user views from one side of the first base layer 1, there is a good color display effect of the electrochromic layer 3. At the same time, the sheet resistance of the second conductive layer 4 is small, avoiding the reduction of the color change rate and color change uniformity of the electrochromic layer 3 caused by an excessive sheet resistance. Therefore, through the matching of the first conductive layer 2 with a relatively high sheet resistance and the second conductive layer 4 with a relatively low sheet resistance, the present invention synergistically realizes the distinct display of the color of the electrochromic layer and the effects of fast and uniform color change of the electrochromic device.

[0047] Embodiment 2

[0048] As Figure 2 shown, this embodiment provides an electrochromic device, which includes a first base layer 1, a first conductive layer 2, an electrochromic layer 3, a second conductive layer 4, and a second base layer 5 stacked in sequence; the sheet resistance of the first conductive layer 2 is greater than that of the second conductive layer 4. Among them, the electrochromic layer 3 includes a color-changing material layer 301, a solid electrolyte layer 302, and an ion storage layer 303 stacked in sequence, and the color-changing material layer 301 is located on the side close to the first conductive layer 2. A first bus bar 6 is provided on the first conductive layer 2, and the first bus bar 6 is not in contact with the electrochromic layer 3. The first base layer 1 is made of PET, the second base layer 5 is made of PET, and the conductive materials of the first conductive layer 2 and the second conductive layer 4 are the same, which is ITO. The sheet resistance of the first conductive layer 2 is 80 Ω, and the sheet resistance of the second conductive layer 4 is 20 Ω.

[0049] On the basis of having the beneficial effects of Embodiment 1, this embodiment further improves the voltage distribution uniformity of the first conductive layer 2 by providing a first bus bar 6. The first bus bar 6 is arranged along the periphery of the electrochromic device, thereby improving the color change speed and color change uniformity of the electrochromic device. The first bus bar 6 is not in contact with the electrochromic layer 3, thereby preventing the metal in the material of the first bus bar 6 from participating in the redox reaction of the electrochromic layer 3. Since the sheet resistance of the second conductive layer is small, there is no need to provide a bus bar on the second conductive layer. On the one hand, it can save product costs; on the other hand, in the direction from the first conductive layer to the second conductive layer, since there is no second bus bar, there will be no problem of short-circuit failure caused by the upper and lower contact of the first bus bar and the second bus bar. Through this design, the present invention further greatly improves the product reliability, color change speed, and color change uniformity of the electrochromic device.

[0050] In addition, the electrochromic material layer in this embodiment uses poly(3-hexylthiophene), and the solid electrolyte layer uses lithium perchlorate with a mass percentage of 20wt%, methyl methacrylate with a mass percentage of 59.9wt%, 20% propylene carbonate, and azobisisobutyronitrile with a mass percentage of 0.1wt%. After curing, a solid electrolyte layer is formed. The ion storage layer uses WO 3 . The thickness of the electrochromic material layer is 50nm, the thickness of the electrolyte layer is 50μm, and the thickness of the ion storage layer is 50nm. Since the color of the electrochromic layer is mainly determined by the electrochromic material layer, in the present invention, by disposing the electrochromic material layer on the side close to the first conductive layer, when the user views from the outside of the first conductive layer, the color display effect of the electrochromic device is better.

[0051] Embodiment 3

[0052] As Figure 3 shown, this embodiment provides an electrochromic device 100, and the electrochromic device 100 includes an electrode lead-out area 101.

[0053] As Figure 4 shown, the electrochromic device 100 includes a first base layer 1, a first conductive layer 2, an electrochromic layer, a second conductive layer 4, and a second base layer 5 stacked in sequence; the surface resistance of the first conductive layer 2 is greater than that of the second conductive layer 4. Among them, the electrochromic layer 3 includes an electrochromic material layer 301, a solid electrolyte layer 302, and an ion storage layer 303 stacked in sequence, and the electrochromic material layer 301 is located on the side close to the first conductive layer 2. A first bus bar 6 is provided on the first conductive layer 2, and the first bus bar 6 is not in contact with the electrochromic layer 3. The first base layer 1 uses PET, the second base layer 5 uses PET, and the conductive materials of the first conductive layer 2 and the second conductive layer 4 are the same, which is ITO. The surface resistance of the first conductive layer 2 is 80Ω, and the surface resistance of the second conductive layer 4 is 20Ω.

[0054] The first conductive layer 2 includes a first region 21 and a second region 22. The conductive material of the side of the second region 22 adjacent to the first region 21 is missing a first width to form a first partition area 221; the first width is 0.1mm.

[0055] In the electrode lead-out area 101 of the electrochromic device 100, the second area 22 is connected to the second conductive layer 4 through the conductive member 7; the first area 21 is connected to a first lead-out electrode (not shown in the figure), and the second area 22 is connected to a second lead-out electrode (not shown in the figure); at least a part of the side surface of the conductive member 7 is in contact with the electrochromic layer 3. The electrochromic material layer 301 is provided with a second partition area 31. The second partition area 31 is opened from the side of the electrochromic material layer 301 away from the first conductive layer 2. The width of the second partition area 31 is 0.2 mm. The projection of the second partition area 31 on the first conductive layer 2 partially coincides with and partially does not coincide with the first partition area 221.

[0056] The second partition area 31 is filled with an electrolyte material the same as that of the solid electrolyte layer 302, so that the solid electrolyte layer 302 is in contact with the first partition area 221 through the electrolyte material in the second partition area 31.

[0057] The thickness of the electrochromic layer is 30 μm, and the thickness of the conductive member is 30 μm. The material of the first base layer is flexible PET. The material of the second base layer is flexible PET.

[0058] On the basis of having the beneficial effects of the second embodiment, the electrochromic device of this embodiment further sets a first partition area 221 on the first conductive layer 2, so that the first conductive layer 2 is divided into two mutually partitioned areas. The conductive materials of the first area 21 and the second area 22 are not electrically connected to each other. Furthermore, a first lead-out electrode is led out from the first area 21, and a second lead-out electrode is led out from the second area 22, so that both the first lead-out electrode and the second lead-out electrode are led out from the first conductive layer 2 of the electrochromic device. In this way, it can be as Figure 4As shown, a flexible printed circuit board integrating two lead-out lines can be used during welding. By performing a single hot press welding from one side of the first conductive layer of the electrochromic device, the two lead-out circuits of the flexible printed circuit board can be respectively welded to the first bus bar 6 and the conductive member 7 at the same time, realizing the welding and lead-out of the first lead-out electrode and the second lead-out electrode, greatly simplifying the production process, improving the production efficiency and product yield, and being beneficial to reducing the area of the electrode lead-out region 101 where color or transmittance changes cannot occur, thereby further enhancing the appearance display effect of the electrochromic device. To avoid the occurrence of micro-short circuits inside the electrochromic device, a second partition area 31 is further provided on the electrochromic layer, and the projection of the second partition area 31 on the first conductive layer 2 at least partially coincides with the first partition area 221, thereby preventing conductive substances or conductive particles in the electrochromic layer from filling the first partition area 221 and causing the partition of the first partition area 221 to fail. Therefore, this embodiment greatly simplifies the production process, improves the production efficiency and product yield, and is beneficial to reducing the area of the non-color-changing region on the electrochromic device, further enhancing the display effect of the appearance color.

[0059] Embodiment 4

[0060] Based on any one of the foregoing Embodiments 1 to 3, the first substrate layer 11, the second substrate layer 12, and the seal 15 can be further provided.

[0061] See Figure 5 , taking the further setting of the first substrate layer 8 and the second substrate layer 9 on the basis of Embodiment 3 as an example for structural description, and the other embodiments will not be elaborated one by one. Specifically, the side of the first base layer 1 away from the first conductive layer 2 is connected to the first substrate layer 8 through the first adhesive layer 10; the side of the second base layer 5 away from the second conductive layer 4 is connected to the second substrate layer 9 through the second adhesive layer 11. The seal 12 is provided along the periphery of the electrochromic layer. The seal 12 is provided between the first substrate layer 8 and the second substrate layer 9, and the projection of the outer side surface of the seal 12 on the first substrate layer 8 coincides with the outer periphery of the first substrate layer 8, and the projection of the outer side surface of the seal 12 on the second substrate layer 9 coincides with the outer periphery of the second substrate layer 9.

[0062] The first substrate layer 8 is glass, and the second substrate layer 9 is a flexible water and oxygen barrier film. The material of the first adhesive layer 10 can block ultraviolet light. The distance from each point on the contour of the projection of the first conductive layer on the first substrate layer to the edge of the first substrate layer is 0.8 mm.

[0063] On the basis of having the beneficial effects of Embodiment III, the electrochromic device of this embodiment further improves the protection of the electrochromic device, enhances the mechanical structural strength of the electrochromic device, and further prevents water, oxygen, etc. in the external environment from invading through the second substrate layer 5 and affecting the service life of the electrochromic device by providing the first substrate layer 8 and the second substrate layer 9; and by filling the sealant 12 between the first substrate layer 8 and the second substrate layer 9 and in the spatial area around the electrochromic layer 3, a good sealing effect can be achieved, avoiding the influence of water, oxygen, etc. on the electrochromic layer 3, thereby increasing the service life of the electrochromic device. This embodiment further slows down the material aging of the electrochromic layer and increases the service life of the electrochromic device by setting the material of the first adhesive layer 13 to an adhesive layer that can block ultraviolet light.

[0064] Embodiment V

[0065] An electronic device 200, see Figure 6 , includes any one of the electrochromic devices 100 in the foregoing Embodiments I - V. The first substrate layer 1 of the electrochromic device 100 is on the side close to the incident environmental light.

[0066] The electronic device 200 of this embodiment includes the electrochromic device 100 of any of the above embodiments, and has low production cost, simple production process, high production efficiency, high product yield, and good product stability. By setting the first substrate layer 1 on the incident side close to the environmental light, through the matching of the first conductive layer 2 with a relatively high surface resistance and the second conductive layer 4 with a relatively low surface resistance, the electrochromic device can vividly display the color of the electrochromic layer and achieve the effects of fast and uniform color change, enabling the electronic device 200 to have better color display effects, fast color change, and uniform color change effects.

[0067] The applicant declares that the present invention uses the above embodiments to illustrate the process method of the present invention, but the present invention is not limited to the above process steps, that is, it does not mean that the present invention must rely on the above process steps to be implemented. Those skilled in the art should understand that any improvement to the present invention, the equivalent substitution of the raw materials selected for the present invention, the addition of auxiliary components, the selection of specific methods, etc. all fall within the protection scope and the disclosure scope of the present invention.

Claims

1. An electrochromic device, characterized in that, it includes a first base layer, a first conductive layer, an electrochromic layer, a second conductive layer and a second base layer stacked in sequence; the surface resistance of the first conductive layer is greater than that of the second conductive layer; the conductive materials of the first conductive layer and the second conductive layer are the same; the first base layer is on the side close to the incident environmental light; the electrochromic layer includes a color-changing material layer, a solid electrolyte layer and an ion storage layer stacked in sequence, and the color-changing material layer is on the side close to the first conductive layer; the first conductive layer is composed of a conductive material, the first conductive layer includes a first region and a second region, and the conductive material on the side of the second region adjacent to the first region lacks a first width to form a first partition area; the second region is connected to the second conductive layer through a conductive member; the first region is connected to a first lead electrode, and the second region is connected to a second lead electrode; the color-changing material layer is provided with a second partition area, the second partition area divides the color-changing material layer into two non-connected regions, and the projection of the second partition area on the first conductive layer at least partially coincides with the first partition area; the second partition area is filled with an electrolyte material the same as that of the solid electrolyte layer, so that the solid electrolyte layer contacts the first partition area through the electrolyte material in the second partition area.

2. The electrochromic device according to claim 1, characterized in that, a first bus bar is provided on the first conductive layer, and the first bus bar is not in contact with the electrochromic layer.

3. The electrochromic device according to claim 1, characterized in that, the ratio of the surface resistance of the first conductive layer to that of the second conductive layer is greater than or equal to 1.

5.

4. The electrochromic device according to claim 1, characterized in that, one side of the first base layer away from the first conductive layer is connected to a first substrate layer through a first adhesive layer, and the first adhesive layer is made of a material with an ultraviolet blocking effect.

5. The electrochromic device according to claim 4, characterized in that, the distances from the points on the contour of the projection of the first conductive layer on the first substrate layer to the edge of the first substrate layer are greater than or equal to 0.1 mm.

6. The electrochromic device according to claim 4, characterized in that, a seal is provided along the circumferential side of the electrochromic layer, and the outer side surface of the seal coincides with the outer circumference of the first substrate layer in the projection on the first substrate layer.

7. An electronic device, characterized in that, it includes the electrochromic device according to any one of claims 1-6, and the first base layer of the electrochromic device is on the side close to the incident environmental light.

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