ELECTROCHROMIC DEVICE HAVING ADJUSTABLE REFLECTIVITY, AND ELECTRONIC TERMINAL COMPRISING SAME

Abstract

An electrochromic device having the adjustable reflectivity, and an electronic terminal comprising same. The electrochromic device comprises a first transparent substrate layer (1), an electrochromic stack (2), a metal ion stack (3), and a second substrate layer (4) which are stacked in sequence. The electrochromic stack (2) comprises a first transparent conductive layer (21) and a first electrochromic functional layer (22) which are stacked. The metal ion stack (3) comprises a second transparent conductive layer (31), a metal ion layer (32), and an electrodeposition suppression layer (33) which are stacked in sequence. The first electrochromic functional layer (22) is adjacent to the electrodeposition suppression layer (33). The visual effect of the electrochromic device is enhanced by the cooperation of the change in the transmittance of the electrochromic stack (2) and the change in the reflectivity of the metal ion stack (3).

Claims

1. An electrochromic device having adjustable reflectivity, comprising a first transparent substrate layer, an electrochromic stack, a metal ion stack and a second substrate layer stacked in sequence; the electrochromic stack comprises a first transparent conductive layer and a first electrochromic functional layer stacked; the metal ion stack comprises a second transparent conductive layer, a metal ion layer and, optionally, an electrodeposition suppression layer stacked in sequence; the first electrochromic functional layer is adjacent to the metal ion layer or the electrodeposition suppression layer; or comprising a first transparent substrate layer, an electrochromic stack, a transparent insulating layer, a metal ion stack and a second substrate layer stacked in sequence; the electrochromic stack comprises a first transparent conductive layer, a second electrochromic functional layer and a third transparent conductive layer stacked in sequence; the metal ion stack comprises a second transparent conductive layer, a metal ion layer and a fourth conductive layer stacked in sequence.

2. The electrochromic device according to claim 1, wherein the first electrochromic functional layer is an anodic electrochromic material layer or a cathodic electrochromic material layer.

3. The electrochromic device according to claim 1, wherein the second electrochromic functional layer is a polymer dispersed liquid crystal layer, a suspended particle device layer, or a composite layer of an anodic electrochromic material, an electrolyte and a cathodic electrochromic material.

4. The electrochromic device according to claim 1, wherein the metal ion layer is a metal ion-containing liquid electrolyte layer or a metal ion-containing gel electrolyte layer.

5. The electrochromic device according to claim 1, wherein a metal ion in the metal ion layer comprises one or a combination of at least two of a silver ion, a bismuth ion, a copper ion and a zinc ion.

6. The electrochromic device according to claim 1, wherein the fourth conductive layer comprises staggered or spaced metal wires, and/or a metal strip located at an edge of the plane where the fourth conductive layer is located.

7. The electrochromic device according to claim 1, wherein a metal layer is further provided between the metal ion layer and the second transparent conductive layer, and a metal element of the metal layer comprises one or a combination of at least two of silver, bismuth, copper and zinc.

8. The electrochromic device according to claim 1, wherein a material of the electrodeposition suppression layer is selected from a triazole derivative.

9. The electrochromic device according to claim 1, wherein the first transparent conductive layer and the third transparent conductive layer are independently formed from one or at least two of indium tin oxide, zinc aluminum oxide, fluorine doped tin oxide, silver nanowires, graphene, carbon nanotubes, metal mesh and silver nanoparticles.

10. The electrochromic device according to claim 1, wherein the transparent insulating layer is a hollow layer, a transparent substrate layer, or a composite layer of a plurality of transparent substrate layers bonded by an adhesive layer.

11. The electrochromic device according to claim 1, wherein a functional layer is further arranged on one side or two sides of the first transparent substrate layer, and/or one side or two sides of the second substrate layer, and/or one side or two sides of the transparent insulating layer, and/or arranged between the transparent insulating layers, wherein the functional layer comprises one or a combination of at least two of a pattern layer, a texture layer, an anti-reflective layer, a color layer, an ink layer, a filter layer, a photonic crystal layer, a liquid crystal layer and an adhesive layer.

12. An electronic terminal, comprising the electrochromic device according to claim 1.

13. The electrochromic device according to claim 6, wherein a width of the metal wire is less than or equal to 100 μm.

14. The electrochromic device according to claim 6, wherein a distance between two adjacent spaced metal wires is more than or equal to 10 μm.

15. The electrochromic device according to claim 6, wherein a width of the metal strip is less than or equal to 3 cm.

16. The electrochromic device according to claim 8, wherein the triazole derivative is selected from one or a combination of at least two of benzotriazole, 1-(methoxymethyl)-1H-benzotriazole, 1-(formamidomethyl)-1H-benzotriazole and N5-benzyl-1H-1,2,4-triazole-3,5-diamine.

17. The electrochromic device according to claim 1, wherein a substrate support layer is further arranged on the outer side of the first transparent substrate layer and/or the outer side of the second substrate layer.

18. The electrochromic device according to claim 17, wherein the substrate support layer is connected to the first transparent substrate layer and/or the second substrate layer by a bonding layer.

Description

BRIEF DESCRIPTION OF DRAWINGS

[0048] FIG. 1 is a schematic cross-sectional structure diagram of an electrochromic device provided in Embodiment 1 of the present application;

[0049] FIG. 2 is a schematic cross-sectional structure diagram of an electrochromic device provided in Embodiment 2 of the present application;

[0050] FIG. 3 is a schematic cross-sectional structure diagram of an electrochromic device provided in Embodiment 4 of the present application;

[0051] FIG. 4 is a schematic cross-sectional structure diagram of an electrochromic device provided in Embodiment 5 of the present application;

[0052] FIG. 5 is a schematic cross-sectional structure diagram of an electrochromic device provided in Embodiment 6 of the present application;

[0053] FIG. 6 is a schematic cross-sectional structure diagram of an electrochromic device provided in Embodiment 7 of the present application;

[0054] FIG. 7 is a schematic cross-sectional structure diagram of a second electrochromic functional layer in Embodiment 7 of the present application;

[0055] FIG. 8 is a schematic structural diagram of a fourth conductive layer in Embodiment 7 of the present application;

[0056] FIG. 9 is a schematic cross-sectional structure diagram of an electrochromic device provided in Embodiment 8 of the present application;

[0057] FIG. 10 is a schematic structural diagram of a fourth conductive layer in Embodiment 8 of the present application;

[0058] FIG. 11 is a schematic cross-sectional structure diagram of an electrochromic device provided in Embodiment 11 of the present application; and

[0059] FIG. 12 is a schematic cross-sectional structure diagram of an electrochromic device provided in Embodiment 12 of the present application.

[0060] In the figures, 1 is a first transparent substrate layer, 2 is an electrochromic stack, 3 is a metal ion stack, 4 is a second substrate layer, 5 is a functional layer, 6 is a first substrate support layer, 7 is a second substrate support layer, and 8 is a transparent insulating layer;

[0061] 21 is a first transparent conductive layer, 22 is a first electrochromic functional layer, 23 is a second electrochromic functional layer, and 24 is a third transparent conductive layer;

[0062] 221 is a cathodic electrochromic material layer, 222 is an electrolyte layer, and 223 is an anodic electrochromic material layer;

[0063] 31 is a second transparent conductive layer, 32 is a metal ion layer, 33 is an electrodeposition suppression layer, 34 is a metal layer, and 35 is a fourth conductive layer;

[0064] 81 is a third transparent substrate layer, 82 is a functional layer, and 83 is a fourth transparent substrate layer.

DETAILED DESCRIPTION

[0065] The technical solutions of the present application will be further described below with reference to the accompanying drawings and through specific embodiments. It should be apparent to those skilled in the art that the specific embodiments are merely used for a better understanding of the present application, and should not be construed as a specific limitation of the present application.

Embodiment 1

[0066] This embodiment provides an electrochromic device having adjustable reflectivity, as shown in FIG. 1, including a first transparent substrate layer 1, an electrochromic stack 2, a metal ion stack 3 and a second substrate layer 4 stacked in sequence;

[0067] the electrochromic stack 2 includes a first transparent conductive layer 21 and a first electrochromic functional layer 22 stacked;

[0068] the metal ion stack 3 includes a second transparent conductive layer 31, a metal ion layer 32 and an electrodeposition suppression layer 33 stacked in sequence, and the first electrochromic functional layer 22 is adjacent to the electrodeposition suppression layer 33;

[0069] wherein, the first transparent conductive layer 21 and the second transparent conductive layer 31 are used as a pair of electrodes for driving the electrochromic device, the second substrate layer 4 is completely transparent, a material of the first electrochromic functional layer 22 is NiO, a material of the metal ion layer 32 is a colloid formed by dissolving 3.0 wt % hydroxyethyl cellulose in an aqueous solution of 10 mM AgNO.sub.3, and a material of the electrodeposition suppression layer 33 is N5-benzyl-1H-1,2,4-triazole-3,5-diamine.

[0070] The process of adjusting the transmittance and reflectivity of the electrochromic device provided in this embodiment is exemplarily described below:

[0071] Initial state: the electrochromic stack 2 was initially colorless, the metal ion stack 3 was initially a transparent state, and the appearance of the electrochromic device was a colorless and transparent state;

[0072] Applying a forward voltage (+2.0 V): a forward voltage was applied to the electrochromic device in the initial state, and NiO lost electrons and underwent an oxidation reaction, which changed from colorless to tan; Ag.sup.+ in the metal ion layer 32 gained electrons and underwent reduction, and deposited a metal Ag layer with a reflective effect on the surface of the second transparent conductive layer 31; the electrochromic stack 2 still had a certain transmittance in a colored state, and after the light passed through the electrochromic stack, it would be reflected by the reflective mirror, so that the appearance of the electrochromic device was a tan mirror with a reflective effect;

[0073] Applying a reverse voltage (−1.2 V): NiO gained electrons and underwent reduction, and the color reverted to colorless; the deposited metal Ag layer was oxidized to Ag.sup.+, and then entered the metal ion layer 32, and the metal ion stack reverted to the transparent state; the electrochromic device reverted to the initial state, and the appearance was the colorless and transparent state;

[0074] In this embodiment, when a potential of the first transparent conductive layer 21 is higher than a potential of the second transparent conductive layer 31, the voltage direction is referred as a forward; when the potential of the first transparent conductive layer 21 is lower than the potential of the second transparent conductive layer 31, the voltage direction is referred as a reverse.

[0075] In the process of applying voltage to the electrochromic device, by adjusting parameters such as the magnitude, duration, direction and the like of the applied voltage, the transmittance of the electrochromic stack 2 can be adjusted to any predetermine transmittance state between the colored state and the decolorized state, and the reflectivity of the metal ion stack 3 can be adjusted to any predetermine reflectivity of semi-transmitted and semi-reflected state between transparent and completely reflective, which enriches and enhances the appearance effect of the electrochromic device. The electrochromic device can be used in a wearable electronic product, a mobile electronic product terminal, architectural glass, laminated glass, insulating glass, a decorative film and other electronic terminal products.

Embodiment 2

[0076] This embodiment provides an electrochromic device having adjustable reflectivity, the structure of which is shown in FIG. 2, and this embodiment differs from Embodiment 1 in that the metal ion stack 3 includes a second transparent conductive layer 31, a metal layer 34, a metal ion layer 32 and an electrodeposition suppression layer 33 stacked in sequence.

[0077] A material of the first electrochromic functional layer 22 is WO.sub.3, a material of the metal layer 34 is Cu, a material of the metal ion layer 32 is a colloid formed by dissolving 3.0 wt % hydroxyethyl cellulose in an aqueous solution of 20 mM Cu(Cl).sub.2, 10 mM HCl and 1 M LiBr, and a material of the electrodeposition suppression layer 33 is benzotriazole.

[0078] The process of adjusting the transmittance and reflectivity of the electrochromic device provided in this embodiment is described below:

[0079] Initial state: the electrochromic stack 2 was initially colorless, the metal ion stack 3 was initially a reflective state, and the appearance of the electrochromic device was a reflective copper mirror effect;

[0080] Applying a reverse voltage (−2.0 V): a reverse voltage was applied to the electrochromic device in the initial state, and WO.sub.3 gained electrons and underwent reduction, and changed from colorless to blue; Cu in the metal layer 34 lost electrons and was oxidized to Cu.sup.2+, and then entered the metal ion layer 32, and the metal ion stack 3 changed from a reflective mirror state to a transparent state; the appearance of the electrochromic device was a blue of a certain transmittance;

[0081] Applying a forward voltage (+1.0 V): the first electrochromic functional layer 22 was oxidized, and the color reverted to colorless; the metal ions in the metal ion layer 32 underwent reduction, and deposited a metal layer 34 with a reflective effect on the surface of the second transparent conductive layer 31; the electrochromic device reverted to the initial state, and reverted to a reflective copper mirror effect;

[0082] In this embodiment, when a potential of the first transparent conductive layer 21 is higher than a potential of the second transparent conductive layer 31, the voltage direction is referred as a forward; when the potential of the first transparent conductive layer 21 is lower than the potential of the second transparent conductive layer 31, the voltage direction is referred as a reverse.

[0083] In the process of applying voltage to the electrochromic device, by adjusting parameters such as the magnitude, duration, direction, and the like of the applied voltage, the transmittance of the electrochromic stack 2 can be adjusted to any predetermine transmittance state between the colored state and the decolorized state, and the reflectivity of the metal ion stack 3 can be adjusted to any predetermine reflectivity of semi-transmitted and semi-reflected state between transparent and completely reflective, which enriches and enhances the appearance effect of the electrochromic device. The electrochromic device can be used in a wearable electronic product, a mobile electronic product terminal, architectural glass, laminated glass, insulating glass, a decorative film and other electronic terminal products.

Embodiment 3

[0084] This embodiment provides an electrochromic device having adjustable reflectivity, and differs from Embodiment 1 in that the second substrate layer 4 is partially transparent or completely opaque, and adopts a material with a predetermined color, texture or pattern.

Embodiment 4

[0085] This embodiment provides an electrochromic device having adjustable reflectivity, the structure of which is shown in FIG. 3, and this embodiment differs from Embodiment 1 in that a functional layer 5 is arranged on the side of the first transparent substrate layer 1 close to the electrochromic stack 2; the functional layer 5 is a pattern layer, a texture layer, an anti-reflective layer, a color layer, an ink layer, a filter layer, a photonic crystal layer or a liquid crystal layer.

[0086] In an alternative to this embodiment, the functional layer 5 can also be arranged on the side of the first transparent substrate layer 1 away from the electrochromic stack 2, and/or the side of the second substrate layer 4 close to the metal ion stack 3, the side of the second substrate layer 4 away from the metal ion stack 3, or both sides of the metal ion stack 2, and/or both sides of the first transparent substrate layer 1, and/or both sides of the second substrate layer 4.

Embodiment 5

[0087] This embodiment provides an electrochromic device having adjustable reflectivity, the structure of which is shown in FIG. 4, and this embodiment differs from Embodiment 1 in that a first substrate support layer 6 is arranged on the outer side of the first transparent substrate layer 1 (the first transparent substrate layer 1 and the first substrate support layer 6 are bonded by a bonding layer, and the bonding layer is not shown in FIG. 5), and a second substrate support layer 7 is arranged on the outer side of the second substrate layer 4 (the second substrate layer 4 and the second substrate support layer 7 are bonded by a bonding layer, and the bonding layer is not shown in FIG. 5).

[0088] In an alternative to this embodiment, the first substrate support layer 6 can also be merely arranged on the outer side of the first transparent substrate layer 1, or the second substrate support layer 7 can also be merely arranged on the outer side of the second substrate layer 4.

Embodiment 6

[0089] This embodiment provides an electrochromic device having adjustable reflectivity, as shown in FIG. 5, including a first transparent substrate layer 1, an electrochromic stack 2, a metal ion stack 3 and a second substrate layer 4 stacked in sequence;

[0090] the electrochromic stack 2 includes a first transparent conductive layer 21 and a first electrochromic functional layer 22 stacked;

[0091] the metal ion stack 3 includes a second transparent conductive layer 31 and a metal ion layer 32 stacked in sequence, and the first electrochromic functional layer 22 is adjacent to the metal ion layer 32;

[0092] wherein, the first transparent conductive layer 21 and the second transparent conductive layer 31 are used as a pair of electrodes for driving the electrochromic device, the second substrate layer 4 is completely transparent, a material of the first electrochromic functional layer 22 is poly-2-[(2-ethylhexyloxy)methyl]3,4-thieno-1,4-dioxane, and a material of the metal ion layer 32 is Bi(Cl).sub.3.

[0093] The process of adjusting the transmittance and reflectivity of the electrochromic device provided in this embodiment is exemplarily described below:

[0094] Initial state: the electrochromic stack 2 was initially blue, the metal ion stack 3 was initially a transparent state, and the appearance of the electrochromic device was a transparent and blue state;

[0095] Applying a forward voltage (+1.6 V): a forward voltage was applied to the electrochromic device in the initial state, and poly-2-[(2-ethylhexyloxy)methyl]3,4-thieno-1,4-dioxane lost electrons and underwent an oxidation reaction, which changed from blue to colorless; Bi.sup.3+ in the metal ion layer 32 gained electrons and underwent reduction, and deposited a metal Bi layer with a reflective effect on the surface of the second transparent conductive layer 31; the appearance of the electrochromic device was a silver mirror with a reflective effect;

[0096] Applying a reverse voltage (−1.6V): poly-2-[(2-ethylhexyloxy)methyl]3,4-thieno-1,4-dioxane gained electrons and underwent reduction, and the color reverted to blue; the deposited metal Bi layer was oxidized to Bi.sup.3+, and then entered the metal ion layer 32, and the metal ion stack reverted to the transparent state; the electrochromic device reverted to the initial state, and the appearance was the transparent and blue state.

[0097] In this embodiment, when a potential of the first transparent conductive layer 21 is higher than a potential of the second transparent conductive layer 31, the voltage direction is referred as a forward; when the potential of the first transparent conductive layer 21 is lower than the potential of the second transparent conductive layer 31, the voltage direction is referred as a reverse.

[0098] In the process of applying voltage to the electrochromic device, by adjusting parameters such as the magnitude, duration, direction and the like of the applied voltage, the transmittance of the electrochromic stack 2 can be adjusted to any predetermine transmittance state between the colored state and the decolorized state, and the reflectivity of the metal ion stack 3 can be adjusted to any predetermine reflectivity of semi-transmitted and semi-reflected state between transparent and completely reflective, which enriches and enhances the appearance effect of the electrochromic device. The electrochromic device can be used in a wearable electronic product, a mobile electronic product terminal, architectural glass, laminated glass, insulating glass, a decorative film and other electronic terminal products.

[0099] However, since this embodiment dose not adopt an electrodeposition suppression layer, there will be any metal Bi deposited on the first electrochromic functional layer 22 gradually as the charge and discharge performs, affecting the long-term cycle performance of the electrochromic device as well as the appearance effect.

Embodiment 7

[0100] This embodiment provides an electrochromic device having adjustable reflectivity, as shown in FIG. 6, including a first transparent substrate layer 1, an electrochromic stack 2, a transparent insulating layer 8, a metal ion stack 3 and a second substrate layer 4 stacked in sequence;

[0101] the electrochromic stack 2 includes a first transparent conductive layer 21, a second electrochromic functional layer 23 and a third transparent conductive layer 24 stacked in sequence, and the first transparent conductive layer 21 is close to the first transparent substrate layer 1;

[0102] the metal ion stack 3 includes a second transparent conductive layer 31, a metal ion layer 32 and a fourth conductive layer 35 stacked in sequence, and the second transparent conductive layer 31 is close to the second substrate layer 4;

[0103] the structure of the second electrochromic functional layer 23 is shown in FIG. 7, which is composed of a cathodic electrochromic material layer 231, an electrolyte layer 232 and an anodic electrochromic material layer 233 stacked in sequence, and the cathodic electrochromic material layer 231 is close to the first transparent conductive layer 21;

[0104] wherein, the first transparent conductive layer 21 and the third transparent conductive layer 24 are used as a pair of electrodes for driving the electrochromic stack 2; the second transparent conductive layer 31 and the fourth conductive layer 35 are used as a pair of electrodes for driving the metal ion stack 3;

[0105] the second substrate layer 4 is completely transparent, the transparent insulating layer 8 is a transparent substrate layer, a material of the cathodic electrochromic material layer 231 is tungsten oxide, a material of the electrolyte layer is LiClO.sub.4-propylene carbonate, a material of the anodic electrochromic material layer 233 is nickel oxide, and a material of the metal ion layer 32 is a colloid formed by dissolving 3.0 wt % hydroxyethyl cellulose in an aqueous solution containing 10 mM CuCl.sub.2, 10 mM BiCl.sub.3, 10 mM HCl and 1 M LiBr;

[0106] the shape of the fourth conductive layer 35 is shown in FIG. 8, which includes metal network wires composed of staggered Cu/Bi alloy metal wires, and a width of the metal wire is 10 μm, and an interval between metal wires is 80 μm.

[0107] The process of adjusting the transmittance and reflectivity of the electrochromic device provided in this embodiment is exemplarily described below:

[0108] Initial state: the electrochromic stack 2 was initially colorless, the metal ion stack 3 was initially a transparent state; the electrochromic device was a transparent state. Without electricity applied to the electrochromic stack 2 and the metal ion stack 3, the incident light could thus pass through the electrochromic stack 2 and the metal ion stack 3.

[0109] Adjustment of the transmittance of the electrochromic stack 2: a reverse voltage of −2 V was applied to the electrochromic stack solely (a potential of the first transparent conductive layer 21 was lower than a potential of the third transparent conductive layer 24), the cathodic electrochromic material layer 231 underwent reduction and changed from colorless to blue, and the anodic electrochromic material layer 233 underwent oxidization and changed from colorless to tan; a forward voltage of +1.5 V was applied (a potential of the first transparent conductive layer 21 was higher than a potential of the three transparent conductive layer 24), the cathodic electrochromic material layer 231 underwent oxidization and changed from blue to colorless, and the anodic electrochromic material layer 233 underwent reduction and changed from tan to colorless; by adjusting parameters such as the magnitude, duration, direction and the like of the applied voltage, the transmittance of the electrochromic stack 2 can be adjusted to any predetermine transmittance state between the colorless decolorized state and the dark-blue (a superimposed color of blue and tan) colored state.

[0110] Adjustment of the reflectivity of the metal ion stack 3: a reverse voltage of +1.0 V was applied to the metal ion stack solely (a potential of the second transparent conductive layer 31 was lower than a potential of the fourth conductive layer 35), and the metal Cu and Bi in the metal mesh of the fourth conductive layer 35 lost electrons and were oxidized to Cu.sup.2+ and Bi.sup.3+, and then entered the metal ion layer 32; the metal ions in the metal ion layer 32 underwent reduction, and deposited a composite metal layer of Cu and Bi with a reflective effect on the surface of the second transparent conductive layer 31, and the metal ion stack 3 was a completely reflective state. By applying a voltage of −1.0 V (a potential of the second transparent conductive layer 31 was higher than a potential of the fourth conductive layer 35), the deposited Cu and Bi of the composite metal layer were oxidized to metal ions, and then entered the metal ion layer 32; the metal ions in the metal ion layer 32 gained electrons and were reduced to metal at the metal network wires of the fourth conductive layer 35, and thus deposited on the metal network wires, and since the light could pass through the network holes, the metal ion stack 3 was a transparent state. By adjusting parameters such as the magnitude, duration, direction and the like of the applied voltage, the reflectivity of the metal ion stack 3 can be adjusted to any predetermine reflectivity of semi-transmitted and semi-reflected state between transparent and completely reflective.

[0111] In the electrochromic device provided in this embodiment, the electrochromic stack 2 and the metal ion stack 3 were separately and independently controlled, and thus the layer number was more than that of Embodiment 1; the electrochromic stack 2 and the metal ion stack 3 had no limitation on each other in state, and could give enriched appearance display effects by adjusting the voltages respectively.

Embodiment 8

[0112] This embodiment provides an electrochromic device having adjustable reflectivity, the structure of which is shown in FIG. 9, and this embodiment differs from Embodiment 7 in that the metal ion stack 3 is configured as such a form that the fourth conductive layer 35 is close to the second substrate layer 4, and the second transparent conductive layer 31 is close to the transparent insulating layer 8, and the shape of the fourth conductive layer 35 is shown in FIG. 10, which is a metal frame formed by four Ag/Bi alloy metal strips located at edges of the plane of the layer, and a width of the strip is 2 cm.

Embodiment 9

[0113] This embodiment provides an electrochromic device having adjustable reflectivity, and this embodiment differs from Embodiment 7 in that the second electrochromic functional layer is a polymer dispersed liquid crystal layer, and a material of the polymer dispersed liquid crystal layer is composed of 15 wt % polymethyl methacrylate polymer and 75 wt % liquid crystal small molecules of 4-(trans-4-n-hexylcyclohexyl)-4′-cyanobiphenyl.

[0114] In an alternative embodiment to this embodiment, the second electrochromic functional layer is a suspended particle device layer.

Embodiment 10

[0115] This embodiment provides an electrochromic device having adjustable reflectivity, and this embodiment differs from Embodiment 7 in that the second substrate layer 4 is partially transparent or completely opaque, and adopts a material with a predetermined color, texture or pattern, and the second electrochromic functional layer 23 is a composite material layer formed by mixing the cathodic electrochromic material, the electrolyte and the anodic electrochromic material.

Embodiment 11

[0116] This embodiment provides an electrochromic device having adjustable reflectivity, the structure of which is shown in FIG. 11, and this embodiment differs from Embodiment 7 in that the transparent insulating layer 8 is composed of a third transparent substrate layer 81, a functional layer 82 and a fourth transparent substrate layer 83 stacked in sequence; the functional layer 82 is a pattern layer, a texture layer, an anti-reflective layer, a color layer, an ink layer, a filter layer, a photonic crystal layer or a liquid crystal layer.

Embodiment 12

[0117] This embodiment provides an electrochromic device having adjustable reflectivity, the structure of which is shown in FIG. 12, and this embodiment differs from Embodiment 7 in that a first substrate support layer 6 is arranged on the outer side of the first transparent substrate layer 1 (the first transparent substrate layer 1 and the first substrate support layer 6 are bonded by a bonding layer, and the bonding layer is not shown in FIG. 9), and a second substrate support layer 7 is arranged on the outer side of the second substrate layer 4 (the second substrate layer 4 and the second substrate support layer 7 are bonded by a bonding layer, and the bonding layer is not shown in FIG. 12).

[0118] In an alternative to this embodiment, the first substrate support layer 6 can also be merely arranged on the outer side of the first transparent substrate layer 1, or the second substrate support layer 7 can also be merely arranged on the outer side of the second substrate layer 4.

[0119] In the electrochromic device provided by embodiments of the present application, the transmittance of the electrochromic stack and the reflectivity of the metal ion stack can be adjusted by adjusting parameters such as the magnitude, duration, direction and the like of the applied voltage, and the combination of the transmittance change of the electrochromic stack and the reflectivity change of the metal ion stack can enhance the visual effect of the existing electrochromic devices, and bring colorful colors and reflective effects to the electrochromic device surface. The electrochromic device can be used in a wearable electronic product, a mobile electronic product terminal, architectural glass, laminated glass, insulating glass, a decorative film and other electronic terminal products.

[0120] The applicant has stated that although the specific embodiments of the present application are described above, the protection scope of the present application is not limited to the embodiments, and it should be apparent to those skilled in the art that variations or replacements, which are obvious for those skilled in the art without departing from the technical scope disclosed in the present application, all fall within the protection scope and the disclosure scope of the present application.