CN220730582U - Electrochromic device - Google Patents

Abstract

The utility model relates to an electrochromic device which comprises an upper color-changing piece and a lower color-changing piece, wherein the bottom of the upper color-changing piece is attached to the top of the lower color-changing piece; the upper color-changing piece comprises an upper substrate layer arranged at the topmost part, an electrochromic layer arranged at the bottom of the upper substrate layer through screen printing and an upper electrolyte layer arranged at the bottom of the electrochromic layer through screen printing, and the lower color-changing piece comprises a lower substrate layer arranged at the bottommost part, a base color layer arranged at the top of the lower substrate layer through screen printing and a lower electrolyte layer arranged at the top of the base color layer through screen printing. The electrochromic device provided by the scheme has good bending performance, wide application range, suitability for application in curved surface scenes, improvement of conductivity of the structure, improvement of complete color-changing efficiency and good color-changing effect.

Description

Electrochromic device

Technical Field

The utility model relates to the field of electronic printing, in particular to an electrochromic device.

Background

Electrochromic refers to the reversible change in color and transparency of a material caused by oxidation-reduction reaction of the material through an electrochemical process under the action of an applied electric field or current, wherein the change is caused by stable reversible change in optical properties (transmittance, reflectivity or absorptivity) of the material in the ultraviolet, visible or near infrared regions under the action of the applied electric field.

With the wide application of electrochromic devices, the hard electrochromic devices can not meet the actual demands, the hard electrochromic devices have no good bending performance and are not suitable for curved surface scene application, and the conventional electronic electrochromic devices have low color changing rate, poor effect and narrow application range.

Disclosure of Invention

The utility model provides an electrochromic device, which aims to solve the problems that the existing electrochromic device has no good bending performance and has poor color-changing effect.

The utility model provides an electrochromic device which comprises an upper color-changing piece and a lower color-changing piece, wherein the bottom of the upper color-changing piece is attached to the top of the lower color-changing piece; the upper color-changing piece comprises an upper substrate layer arranged at the topmost part, an electrochromic layer arranged at the bottom of the upper substrate layer through screen printing and an upper electrolyte layer arranged at the bottom of the electrochromic layer through screen printing, and the lower color-changing piece comprises a lower substrate layer arranged at the bottommost part, a base color layer arranged at the top of the lower substrate layer through screen printing and a lower electrolyte layer arranged at the top of the base color layer through screen printing.

As a further improvement of the present utility model, the upper electrolyte layer is bonded to the lower electrolyte layer by an electrolyte material after curing.

As a further improvement of the utility model, the outer ring of the electrochromic layer is provided with a conductive coil.

As a further improvement of the utility model, the material of the upper substrate layer is PET or TPU or ITO film, the material of the lower substrate layer is conductive metal sheet, and the material of the electrochromic layer is PEDOT: PSS or tungsten trioxide.

As a further improvement of the utility model, the material of the base color layer is a combination of one or more of titanium dioxide, aluminum oxide and barium titanate and epoxy resin glue.

The beneficial effects of the utility model are as follows: the electrochromic device provided by the scheme has good bending performance, wide application range, suitability for application in curved surface scenes, improvement of conductivity of the structure, improvement of complete color-changing efficiency and good color-changing effect.

Drawings

Fig. 1 is a schematic view of the layers of a color shifting device of the present utility model.

Reference numerals: 1-lower substrate layer, 2-base color layer, 3-lower electrolyte layer, 4-upper electrolyte layer, 5-electrochromic layer, 6-upper substrate layer.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be noted that the words "front", "back", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings, and the words "bottom" and "top", "inner" and "outer" refer to directions toward or away from, respectively, the geometric center of a particular component.

As shown in fig. 1, the utility model provides an electrochromic device, which comprises an upper color-changing piece and a lower color-changing piece, wherein the bottom of the upper color-changing piece is attached to the top of the lower color-changing piece; the upper color-changing piece comprises an upper substrate layer 6 arranged at the topmost part, an electrochromic layer 5 arranged at the bottom of the upper substrate layer 6 through screen printing and an upper electrolyte layer 4 arranged at the bottom of the electrochromic layer 5 through screen printing, and the lower color-changing piece comprises a lower substrate layer 1 arranged at the bottommost part, a ground color layer 2 arranged at the top of the lower substrate layer 1 through screen printing and a lower electrolyte layer 3 arranged at the top of the ground color layer 2 through screen printing.

As an embodiment of the present utility model, the upper electrolyte layer 4 and the lower electrolyte layer 3 are bonded by an electrolyte material after being cured.

As another embodiment of the present utility model, the outer ring of the electrochromic layer 5 is provided with a conductive coil.

As another embodiment of the present utility model, the material of the upper substrate layer 6 is a PET or TPU or ITO film, the material of the lower substrate layer 1 is a conductive metal sheet, and the material of the electrochromic layer 5 is PEDOT: PSS or tungsten trioxide.

As another embodiment of the present utility model, the material of the primer layer 2 is a combination of one or more of titanium dioxide, aluminum oxide, and barium titanate and epoxy resin glue.

The electrochromic device provided by the utility model has good bending performance, wide application range, and good color changing effect, and can be suitable for application in curved surface scenes, and the conductivity of the structure is improved, the complete color changing efficiency is improved.

The electrochromic device is mainly prepared by using methods such as coating, screen printing or spraying, and the like, and is divided into two parts, wherein the upper part and the lower part are mutually attached by using electrolyte materials, the electrolyte materials are electrolyte capable of being cured by UV, the specific materials comprise a resin main body, a plasticizer, lithium salt, nano inorganic particles and an auxiliary agent, the electrolyte is colorless and transparent or white in color, and the contrast of the electrochromic device can be further enhanced by the white electrolyte.

The outer ring of the electrochromic layer 5 is provided with a circle of conductive coil, the conductive coil is not in contact with electrolyte, the conductive coil is prevented from reacting with the electrolyte in the color changing process, the performance is prevented from being reduced, the effect of the conductive coil is to improve the conductivity of the electrochromic material, the complete color changing efficiency of the whole device is improved, and the color changing time of a central area is shortened. The electrochromic material is PEDOT PSS or tungsten trioxide.

The upper base material is a PET or TPU or ITO film, and the thickness is 0.05mm-1mm, preferably 0.125mm,0.188mm and 0.25mm; the lower substrate layer 1 is made of conductive metal sheet materials, such as stainless steel, aluminum, copper, silver, gold and the like, has good mechanical strength, can not generate deformation such as bending shrinkage after heating, has the thickness of 0.02mm-2mm, and has good flexibility and good mechanical property within a certain range along with the thickness reduction. The base color layer 2 is made of one or more of titanium dioxide, aluminum oxide and barium titanate and epoxy resin glue, and is used for covering the color of a metal sheet below and enhancing the contrast of the electrochromic device.

The color-changing device is prepared by preheating and shrinking the material of the upper substrate layer 6 for 30 minutes at the temperature of 90-120 ℃, uniformly processing an electrochromic material PEDOT (polyether-ether-ketone) PSS on the upper substrate layer 6 by using a coating or screen printing or spraying mode on the preheated substrate, baking the upper substrate layer 6 printed with the electrochromic material at the temperature of 80-120 ℃ for 10-30 minutes, and then rolling a coiled material or stacking the sheets, and waiting for the next working procedure or directly entering the next working procedure; uniformly processing the material of the ground color layer 2 on the lower base material by a coating method, a screen printing method, a spraying method and the like; and (3) baking the lower substrate layer 1 printed with the material of the ground color layer 2 at 50-80 ℃ for 20-30 minutes, then rolling the coiled material or stacking the sheets, wherein the baking temperature is not too high, so that cracks on the surface of the ground color layer 2 are avoided, and waiting for the next process or directly entering the next process.

The electrolyte material is uniformly processed on the ground color layer 2 by a coating method, a screen printing method, a spraying method or the like, the thickness of the electrolyte layer is 0.01mm-1mm, the electrolyte material is uniformly processed on the electrochromic layer 5 by a coating method, a screen printing method, a spraying method or the like, the thickness of the electrolyte layer is 0.01mm-1mm, and the two steps can improve the interface performance of the lower electrolyte layer 3 and the lower substrate layer 1 and the interface performance of the upper electrolyte layer 4 and the upper substrate layer 6, and avoid the generation of flaws such as bubbles. And curing the upper and lower color-changing pieces through a UV curing device, wherein the thickness of the cured electrolyte is consistent, and after the upper and lower base materials are UV cured, printing the cured electrolyte on the upper and lower electrolyte layers 4 and 3 again, and then attaching. The method can solidify the electrolyte by using UV light irradiation, increase the mechanical strength and stability of the electrolyte, prevent the upper electrolyte layer 4 and the lower electrolyte layer 3 from cracking or falling off in the attaching process, and simultaneously improve the contact performance between the upper substrate and the lower substrate by using a wetting layer, thereby reducing interface impedance and bubble generation. And the electrochromic device is prepared after the upper part and the lower part are bonded.

The solution of the utility model is explained below in two specific examples;

examples

The upper substrate layer 6 is made of PET material, the PET is pre-baked for 30 minutes at 120 ℃, after baking, the PET is cooled, an electrochromic material PEDOT is screen-printed on the PET after cooling, PSS is selected as 300 meshes, the PET is baked for 15 minutes immediately, the temperature is 120 ℃, conductive silver paste is screen-printed on the periphery of the electrochromic layer 5 after cooling, 300 meshes are selected as 300 meshes, a circle of conductive coil is formed, the PET is baked for 15 minutes immediately, the temperature is 120 ℃, and the cooled sheet is stacked or rolled;

the lower substrate layer 1 is made of a stainless steel sheet, the thickness is 0.5mm, white nano titanium dioxide ink (DBE diluent with the mass ratio of anatase nano titanium dioxide powder to epoxy resin glue of 1:1 and mass fraction of 1%) is printed on the stainless steel sheet through screen printing, baking is carried out for 20 minutes at 60 ℃, electrolyte is screen printed on the ground color layer 2 after the electrolyte is cooled, the mesh number is 200 meshes, the thickness is 0.2mm, and UV curing is carried out;

and (3) screen printing electrolyte on the electrochromic layer 5, wherein the mesh number is 200 meshes, the thickness is 0.2mm, then UV curing is carried out, a layer of electrolyte is screen-printed on the cured electrolyte layer, the mesh number is 250 meshes, the thickness is 0.15mm, and then the upper base material and the lower base material are bonded together through hot pressing.

Examples

The upper substrate layer 6 is made of TPU material, the TPU is pre-baked for 30 minutes at 120 ℃, after baking, the TPU is cooled, after cooling, an electrochromic material PEDOT is screen-printed on the TPU, PSS is selected as 300 meshes, then baking is carried out for 15 minutes at 120 ℃, conductive silver paste is screen-printed on the periphery of the electrochromic layer 5 after cooling, 300 meshes are selected as 300 meshes, a circle of conductive coil is formed, then baking is carried out for 15 minutes at 120 ℃, and the cooled sheets are stacked or rolled;

the lower substrate layer 1 is made of a stainless steel sheet, the thickness is 0.5mm, white nano titanium dioxide ink (DBE diluent with the mass ratio of anatase nano titanium dioxide powder to epoxy resin glue of 1:1 and mass fraction of 1%) is printed on the stainless steel sheet through screen printing, baking is carried out for 20 minutes at 60 ℃, electrolyte is screen printed on the ground color layer 2 after the electrolyte is cooled, the mesh number is 200 meshes, the thickness is 0.2mm, and UV curing is carried out;

screen printing electrolyte on the electrochromic layer 5, wherein the mesh number is 200 meshes, the thickness is 0.2mm, then UV curing is carried out, a layer of electrolyte is screen printed on the cured upper electrolyte layer 4, the mesh number is 250 meshes, the thickness is 0.15mm, then the upper substrate and the lower substrate are hot-pressed and bonded together, the temperature is 140 ℃, the time is 15S, and the pressure is 2kg/cm ² . Compared with the first embodiment, the second embodiment can better realize the fitting degree of the upper substrate and the lower substrate due to the characteristics of the TPU.

The foregoing is a further detailed description of the utility model in connection with the preferred embodiments, and it is not intended that the utility model be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the utility model, and these should be considered to be within the scope of the utility model.

Claims (5)

1. The electrochromic device is characterized by comprising an upper color-changing piece and a lower color-changing piece, wherein the bottom of the upper color-changing piece is attached to the top of the lower color-changing piece; the upper color-changing piece comprises an upper substrate layer arranged at the topmost part, an electrochromic layer arranged at the bottom of the upper substrate layer through screen printing and an upper electrolyte layer arranged at the bottom of the electrochromic layer through screen printing, and the lower color-changing piece comprises a lower substrate layer arranged at the bottommost part, a base color layer arranged at the top of the lower substrate layer through screen printing and a lower electrolyte layer arranged at the top of the base color layer through screen printing.

2. The electrochromic device according to claim 1, wherein said upper electrolyte layer and said lower electrolyte layer are bonded by an electrolyte material after curing.

3. An electrochromic device according to claim 1, characterized in that the outer ring of the electrochromic layer is provided with an electrically conductive coil.

4. An electrochromic device according to claim 2, characterized in that the material of the upper substrate layer is PET or TPU or an ITO film, the material of the lower substrate layer is a conductive metal sheet, and the material of the electrochromic layer is PEDOT: PSS or tungsten trioxide.

5. An electrochromic device according to claim 1, characterized in that the material of said ground colour layer is a combination of one or more of titanium dioxide, aluminium oxide, barium titanate and an epoxy glue.