WO2017155373A1 - Dispositif électrochrome, structure d'électrode correspondante, et son procédé de fabrication - Google Patents

Dispositif électrochrome, structure d'électrode correspondante, et son procédé de fabrication Download PDF

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Publication number
WO2017155373A1
WO2017155373A1 PCT/KR2017/003075 KR2017003075W WO2017155373A1 WO 2017155373 A1 WO2017155373 A1 WO 2017155373A1 KR 2017003075 W KR2017003075 W KR 2017003075W WO 2017155373 A1 WO2017155373 A1 WO 2017155373A1
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electrode
electrochromic
layer
bus
electrochromic device
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PCT/KR2017/003075
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English (en)
Korean (ko)
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곽준영
정영희
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애드크로 주식회사
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/15—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on an electrochromic effect
    • G02F1/153—Constructional details
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/15—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on an electrochromic effect
    • G02F1/153—Constructional details
    • G02F1/155—Electrodes

Definitions

  • the present invention relates to the field of electrochromic devices, and more particularly, by forming a bus electrode on the electrochromic layer, the manufacturing process is simple and mass production is possible, and further, even in a large area, the electrochromic property can be exhibited at a uniform and high speed.
  • the present invention relates to an electrochromic device, an electrode structure therefor, and a method of manufacturing the same.
  • the electrochromic device uses a phenomenon in which the electrochromic material is reversibly changed in color due to an oxidation-reduction reaction due to an externally applied voltage. These electrochromic devices not only secure visibility, but also allow the user to actively adjust the transmittance, thereby enabling various color changes to have a wide range of applications such as smart windows, car room mirrors, notebooks, mobile phones, and decorative designs.
  • an electrochromic device is applied on a first electrode and a second electrode between a transparent electroconductive first electrode, a second electrode disposed to face the first electrode, and between the first electrode and the second electrode.
  • the transparent electroconductive electrode mainly uses a plastic or glass substrate coated with indium doped tin oxide (ITO) or fluorine doped tin oxide (FTO).
  • Electrochromic materials that are commonly used to form the electrochromic layer may be divided into an oxidative colored type which changes color by an oxidation reaction and a reduced colored type that changes color by a reduction reaction.
  • Reducing colored materials include inorganic metal oxides such as WO 3 , TiO 2 , Nb 2 O 5 and organic polymer materials such as polyaniline, polythiophene polybiogen, polypyrrole, and the like. PB), IrO 2 , NiO and the like.
  • the uniform color change rate and color change time One of the most important parts of performance evaluation for electrochromic devices is the uniform color change rate and color change time.
  • This electrochromic characteristic depends not only on the method of forming the electrochromic layer, but also, the larger the discoloration area, the faster the discoloration rate near both extremes of applying the applied voltage due to the resistance of the transparent conductive layer, and gradually the further away it is. Since it changes, it cannot have a uniform discoloration speed. In addition, since the discoloration time is also consumed a lot, it is a problem that must be overcome to maintain a uniform discoloration speed and an appropriate response time regardless of the area for the commercialization of the electrochromic device.
  • the method of applying the multilayer thin film structure (Oxide / Metal / Oxide structure) of metal oxide / metal to increase the visible light transmittance through the control of thickness and refractive index when forming the transparent electrode (Korea Patent 10-0939842), a method of reducing sheet resistance by inserting a metal wire of several micrometers level into a transparent electrode (Korean Patent Publication 10-2008-0122062) and a method such as a transparent electrode using silver nanowires (AgNWs) (Korean Patent Registration 10- 1319443), but these methods are not only less durable due to the electrochemical stability of the metal, but also due to the IR drop that occurs when the large-area electrochromic device is manufactured even if the durability is solved. Since area dependence is inevitable, it is not a fundamental alternative.
  • the only way to avoid area dependency is considered to be a method of making a large area electrochromic device into a small device array as shown in FIG. 12.
  • the resulting device will be identical to the characteristics of each of the small-area devices, so the driving characteristics of the entire large-area device are determined by the spacing of the bus bar patterns of the small-area devices in the array.
  • the bus bar 2 directly contacts the transparent electrode 3 as shown in FIG. 12.
  • the electrochromic layer 1 should also be patterned into small unit cells. Patterning of the electrochromic layer 1 is performed by forming the electrochromic layer 1 with respect to the total area and then patterning through etching (Korean Patent Publication 10-2008-0051280, Korean Patent Registration 10-0936121), and patterning by printing method. Although there are methods such as patterning using masking during deposition, all have disadvantages of complicated process and increased cost.
  • the insulating layer 6 for the ideal patterning of the busbars 2 in the narrow gap between the gaps of the electrochromic layer 1 and to prevent contact with the electrolyte 7 can be accurately corrected. It was difficult to pattern the location, which made the actual solution difficult because of increased production costs and difficulty in production.
  • the present invention has been made to solve the problems of the prior art, and the bus electrode is formed on the electrochromic layer or the ion storage layer, and the patterning process of the electrochromic layer is not performed by directly contacting the bus electrode with the transparent conductive electrode.
  • the bus electrode is formed on the electrochromic layer or the ion storage layer, and the patterning process of the electrochromic layer is not performed by directly contacting the bus electrode with the transparent conductive electrode.
  • electrochromic devices having the same electrochromic speed and discoloration time much more easily in large area as well as small area without performing.
  • the present invention provides a method of manufacturing an electrochromic device comprising the improved electrochromic layer described above.
  • the present invention also provides an electrode structure applied to the above-described improved electrochromic device.
  • the present invention provides an electrode structure of the electrochromic device, which comprises: a conductive layer; An electrochromic layer disposed on the conductive layer; A bus electrode having a pattern exposing the electrochromic layer on the electrochromic layer; And an insulating film formed on the surface of the bus electrode.
  • the bus electrode may be the same or similar pattern is repeated on the electrochromic layer.
  • the bus electrode may be a stripe or a grid pattern.
  • the insulating layer may expose an end portion of the bus electrode for external connection of the bus electrode.
  • the present invention also provides an electrochromic device, comprising: an electrolyte layer; And a first electrode portion and a second electrode portion disposed on both sides of the electrolyte layer, wherein at least one of the first electrode portion and the second electrode portion includes an electrochromic layer and the electrochromic layer. And a bus electrode disposed on the surface of the bus electrode, the insulating film formed on a surface of the bus electrode, the insulating film blocking contact between the bus electrode and the electrolyte layer.
  • the insulating layer may expose an end portion of the bus electrode for external connection of the bus electrode.
  • the first electrode part may include an oxidized color electrochromic layer, and the second electrode may include a reduced color electrochromic layer.
  • the first electrode part may include an electrochromic layer, and the second electrode part may include an ion storage layer.
  • the bus electrode may be any one selected from Ir, Ag, Cu, Au, Cr, Al, W, Zn, Ni, Fe, Pt, Pb, and alloys thereof, or carbon black or graphene. It may be any one selected from carbon nanotubes and composites thereof.
  • the bus electrode may be a stripe or grid pattern.
  • the insulating film may be one of a polymer and an inorganic material or a mixture thereof, or an organic-inorganic hybrid.
  • the present invention provides a method for manufacturing an electrochromic device, comprising: (a) forming a first electrode portion and a second electrode portion, respectively; And (b) laminating the first electrode part and the second electrode part via an electrolyte layer, wherein at least one of the first electrode part and the second electrode part is an electrochromic layer and the electrochromic color.
  • a bus electrode having a pattern exposing the electrochromic layer on a layer, and an insulating layer formed on a surface of the bus electrode to block contact between the bus electrode and the electrolyte layer.
  • the electrochromic layer is in contact with the electrolyte layer by an exposure pattern of the bus electrode and the insulating layer.
  • the formation of at least one of the first electrode portion and the second electrode portion may include: (a-1) forming a bus electrode having a pattern exposing the electrochromic layer on the electrochromic layer; And (a-2) forming an insulating film on the surface of the bus electrode.
  • the bus electrode may be formed using one of screen printing, photolithography, imprinting, and inkjet printing.
  • the line width and thickness of the pattern of the bus electrode may be formed to 1 to 500 ⁇ m.
  • the insulating layer may have a thickness of about 2 ⁇ m to about 1000 ⁇ m.
  • the bus electrode may be striped or lattice pattern.
  • the present invention also provides an electrochromic device, comprising: an electrolyte layer; And a first electrode part and a second electrode part laminated on both sides with the center of the electrolyte layer, wherein the first electrode part and the second electrode part have a conductive layer and an electrochromic layer formed on the conductive layer. And a main bus electrode formed on the electrochromic layer, wherein the main bus electrodes of the first and second electrode portions are in a non-contact state with the electrolyte layer.
  • the present invention also provides a method of manufacturing an electrochromic device, comprising the steps of: forming a first electrode part array plate on which a plurality of first electrode parts are arranged and a second electrode part array plate on which a plurality of second electrode parts are arranged; Laminating the first electrode part array plate and the second electrode part plate array via an electrolyte layer array; And cutting the laminated structure into a plurality of individual elements, wherein the first electrode unit array plate and the second electrode unit array plate each include a conductive layer and an electrochromic layer formed on the conductive layer. It includes a main bus electrode formed in an array on the color change layer.
  • the main bus electrodes of the first and second electrode unit array plates are in a non-contact state with the electrolyte layers of the electrolyte layer array.
  • a large-area electrochromic device can be realized by using a structure having an arrangement effect of small devices.
  • a bus electrode in a pattern patterned by micro units on the electrochromic layer to expose the electrochromic layer, a plurality of small devices may be substantially arranged.
  • the structure of the present invention can provide an electrochromic device having the same electrochromic speed and discoloration time in a large area as well as in a small area.
  • This structure of the present invention can also be implemented without the patterning of the electrochromic layer. Furthermore, this structure is applicable to electrochromic layers formed by various methods such as electrochemical deposition, chemical bath deposition, sol-gel method and spattering, and they can all have the same electrochromic effect. Therefore, the size of the device can be variously changed according to a buyer's request, and an electrochromic device having a uniform discoloration speed and a fast response speed can be provided not only in a small area but also in a large area electrochromic device.
  • the bus bar and wiring line for the bus electrode formed on the electrochromic layer or the insulating film formed thereon have a simple film forming process and excellent film stability and durability. The large area of the electrochromic device is very easy to manufacture.
  • the electrochromic device of the present invention can be mass-produced in a very simple manner in both small and large areas.
  • FIG. 1A is a perspective view illustrating an electrochromic device according to a preferred embodiment of the present invention.
  • FIG. 1B and 1C are cross-sectional views of an electrochromic device according to a preferred embodiment of the present invention shown in FIG. 1A.
  • FIGS. 2A and 2B are views illustrating a manufacturing process of the first electrode portion and the second electrode portion, respectively, employed in the electrochromic device according to the preferred embodiment of the present invention.
  • FIG 3 is a view showing a manufacturing process of the electrochromic device according to a preferred embodiment of the present invention.
  • FIG. 4 is a view showing an electrochromic device according to a preferred embodiment of the present invention, which illustrates the formation of a main bus bar.
  • FIG. 5 is a cross-sectional view showing an electrochromic device according to another embodiment of the present invention.
  • 6 to 11 are views for explaining a method of manufacturing an electrochromic device according to another embodiment of the present invention.
  • FIG. 12 is a schematic cross-sectional view of a conventional electrochromic device.
  • the present invention forms a bus electrode on the electrochromic layer to enable mass production in a simple manner in a large area as well as a small area without patterning the electrochromic layer, and even in large areas such as uniform discoloration speed, response speed, and the like.
  • the present invention provides an electrochromic device having a discoloration effect.
  • the electrochromic device includes a bus electrode having a uniform pattern formed on the electrochromic layer. In the case of a small area element, only the main bus electrodes are formed near the corners on the electrochromic layer, and in the large area, the bus electrodes having a uniform pattern on the electrochromic layer, in addition to the main bus electrodes disposed near the corners, or Wiring lines are arranged and an insulating film is formed thereon.
  • the insulating film formed on the surface of the bus electrode or the wiring line blocks the contact between the bus electrode and the wiring line and the electrolyte layer.
  • FIGS. 1A to 1C are diagrams illustrating an electrochromic device according to a preferred embodiment of the present invention.
  • 1A is a perspective view of an electrochromic device of the present invention
  • FIG. 1B is a cross-sectional view taken along the line AA ′ of FIG. 1A
  • FIG. 1C is a cross-sectional view taken along the line BB ′ of FIG. 1A.
  • an electrochromic device includes an electrolyte layer 30 and a first electrode portion 10 laminated on both sides (up and down in the drawing) of the electrolyte layer 30.
  • the second electrode unit 20 is included.
  • the first electrode part 10 and the second electrode part 20 are the electrochromic layers 11 and 21, the bus electrodes 12 and 22 and the bus electrodes disposed on the electrochromic layers 11 and 21, respectively. And insulating films 15 and 25 disposed on the surfaces of 12 and 22.
  • the electrochromic layers 11 and 21 of the electrochromic device may be formed on the substrates 14 and 24 and the conductive layers 13 and 23 formed on the substrates 14 and 24. .
  • the substrates 14 and 24 may be flexible plastic or glass, and the conductive layers 13 and 23 may be transparent.
  • the electrochromic layers 11 and 21 may be applied onto the conductive layers 13 and 23 described above using a coating method such as, for example, a wet coating method.
  • a coating method such as, for example, a wet coating method.
  • the plastic substrate is used as the substrate (14, 24), such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyether sulfone (PES), polycarbonate (PC), etc.
  • low oxygen permeability and drying does not occur during drying Any substrate is possible.
  • Both the indium doped tin oxide (ITO) and the fluorine doped tin oxide (FTO) can be used as the transparent conductive layers 13 and 23, and the electric resistance is
  • the electrochromic layers 11 and 21 are formed using a silicon-based binder sol coating solution in which nanoparticles such as oxidative discoloration material Prussian blue (PB) or reducing discoloration material tungsten oxide (WO 3 ) are uniformly mixed.
  • PB oxidative discoloration material
  • WO 3 reducing discoloration material tungsten oxide
  • Reducing colored materials applicable to the present invention include inorganic metal oxides such as WO 3 , TiO 2 , Nb 2 O 5 , and organic polymer materials such as polyaniline, polythiophene polybiogen, polypyrrole, and the like.
  • Type materials include Prussian blue (PB), IrO 2 , NiO and the like.
  • the bus electrodes 12 and 22 employed in the present invention are formed on the electrochromic layers 11 and 21.
  • the bus electrodes 12 and 22 have a pattern exposing the electrochromic layers 11 and 21.
  • the bus electrodes 12 and 22 may expose the top surfaces of the electrochromic layers 11 and 21 by having a pattern such as a stripe, a cross stripe, or the like.
  • the bus electrodes 12 and 22 may have a configuration in which a uniform pattern is repeated.
  • the bus electrodes 12 and 22 have a stripe pattern, which may be referred to as a bus bar pattern.
  • the electron transfer rate by the redox reaction is increased. Even if a large-area device is manufactured by making it smooth, it can not only have a uniform discoloration speed but also drive a device with little change in response speed compared to the small area.
  • the insulating films 15 and 25 are formed on the surfaces of the bus electrodes 12 and 22 to prevent the bus electrodes 12 and 22 from being exposed to the electrolyte layer 30. Therefore, the insulating films 15 and 25 are disposed to cover both the upper (upper surface) and the side (side) of the bus bars or the wiring lines of the bus electrodes 12 and 22.
  • the insulating layers 15 and 25 are formed on the surfaces of the bus electrodes 12 and 22, and in the illustrated example, on the surfaces (upper and side surfaces) of the respective bus bars to form the electrochromic layers 11 and 21 as the electrolyte layer 30.
  • the bus electrodes 12 and 22 are blocked so as not to be exposed to the electrolyte layer 30 while being exposed to ().
  • the first electrode portion 10 and the second electrode portion 20 is disposed on both sides of the electrolyte layer 30, such as an electrolyte solution or a polymer electrolyte to constitute an electrochromic device. Done.
  • the electrolyte layer 30 such as an electrolyte solution or a polymer electrolyte to constitute an electrochromic device. Done.
  • coloration and decolorization are performed by an oxidation-reduction reaction.
  • the first electrode part 10 may include an electrochromic layer 11, and the second electrode part 20 may include an ion storage layer.
  • an insulating film may not be formed on at least the upper surface portion of the end portions of the bus electrodes 12 and 22.
  • Main busbars 16 and 26 are arranged in this area.
  • the first electrode part 10 and the second electrode part 20 may be laminated so as to be opposite to each other with respect to the electrolyte layer 30.
  • end portions of the bus electrodes on which the insulating film is not formed are exposed to the outside, and main bus bars 16 and 26 are disposed thereon.
  • FIG. 2A a method of manufacturing an electrochromic device according to a preferred embodiment of the present invention will be described in detail with reference to FIGS. 2A, 2B, 3, and 4.
  • FIG. 2A, 2B, 3, and 4 a method of manufacturing an electrochromic device according to a preferred embodiment of the present invention will be described in detail with reference to FIGS. 2A, 2B, 3, and 4.
  • FIG. 2A, 2B, 3, and 4 a method of manufacturing an electrochromic device according to a preferred embodiment of the present invention will be described in detail with reference to FIGS. 2A, 2B, 3, and 4.
  • the first electrode part 10 and the second electrode part 20 are manufactured, respectively, and then laminated on both sides of the prepared electrolyte layer 30.
  • it may be implemented by disposing the electrolyte layer 30 on the first electrode unit 10 and the second electrode unit 20 on the electrolyte layer 30.
  • the first electrode part 10 or the second electrode part 20 forms conductive layers 13 and 23 on the substrates 14 and 24. Thereafter, the electrochromic layers 11 and 21 are formed on the conductive layers 13 and 23.
  • the electrochromic layer 11 of the first electrode part 10 may be formed of an oxidatively colored electrochromic layer, and the second electrode part 20 may be formed of a reduced colored electrochromic layer.
  • the first electrode part 10 may include an electrochromic layer 11, and the second electrode part 20 may include an ion storage layer.
  • an oxidative coloring type such as Prussian blue (PB) may be used.
  • PB Prussian blue
  • a reduced coloring type such as tungsten oxide (WO 3 ) may be used.
  • the coating liquid for forming the electrochromic layers 11 and 21 of the present invention may be prepared by various known techniques.
  • bus electrodes 12 and 22 are formed on the electrochromic layers 11 and 21.
  • the bus electrodes 12 and 22 are formed to have a stripe or grid pattern to expose a portion of the electrochromic layers 11 and 21.
  • the bus electrodes 12 and 22 may be formed using patterning methods such as screen printing, photolithography, imprinting, and inkjet printing.
  • the bus electrodes 12 and 22 formed on the electrochromic layers 11 and 21 may be formed by patterning by a sprin printing method using a screen printing ink containing silver (Ag).
  • the thinner the line width and thickness of the bus electrodes 12, 22 are better.
  • the line widths of the bus electrodes 12 and 22 refer to the line widths of the bus bars in the case of the stripe pattern, and the line widths of the wiring lines forming the lattice pattern in the case of the lattice pattern.
  • the line widths of the bus electrodes 12 and 22 are thick, the pattern may become visible and may not be suitable for use as a window or a mirror. If the thickness of the bus electrodes 12 and 22 is thick, the distance between the two electrochromic electrodes may be increased when the device is formed. It becomes far, which causes the discoloration rate to slow down because the movement distance of electrons by the redox reaction is also long.
  • the line width and thickness of the bus electrode are preferably in the range of 1 to 500 ⁇ m.
  • the conductive ink used for the bus electrodes 12 and 22 should be used within the limit that does not deform the substrate during drying. If the plastic base is used, the conductive ink should have high conductivity even after heat treatment at 150 ° C or lower.
  • silver Ag is used as the conductive filler, but Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, Zr, Nb, Mo, Tc, Ru, Oh, Pd, Ag , At least one metal such as Cd, In, Sn, Sb, W, Os, Ir, Pt, Ag, Pb, or alloys or alloy oxides thereof, carbon black, graphite, carbon nanotubes.
  • Any conductive ink capable of low temperature heat treatment or UV curing, such as a hybrid ink including any one or more components selected from conductive carbon and conductive polymer groups such as carbon nanotubes, can be used.
  • insulating films 15 and 25 are formed on the surfaces of the bus electrodes 12 and 22.
  • the insulating layers 15 and 25 may coat an insulating film such as a polyimide film or a polyester film on the bus electrodes 12 and 22, or may be acrylic, silicon, or polyethylene terephthalate (PET).
  • PET polyethylene terephthalate
  • Polymer solution containing polyester and the like can be formed by screen printing. In addition, it can be formed by a screen printing method using a thermosetting ink that causes thermal curing in the infrared and ultraviolet.
  • the polymer used for the insulating films 15 and 25 should be free of chemical reaction with the electrolyte after drying. If the formed bus electrodes 12 and 22 are stable without chemical reaction with the electrolyte used in the device, the insulating films 15 and 25 can be omitted.
  • the insulating films 15 and 25 may be formed except the corresponding portions, or may be formed on the entire surface of the bus electrodes 12 and 22, and then the insulating layers 15 and 25 of the corresponding portions may be removed.
  • lamination is performed between the first electrode part 10 and the second electrode part 20 with the electrolyte layer 30 interposed therebetween.
  • This may be implemented by applying the electrolyte layer 30 on the first electrode part 10 and then disposing the second electrode part 20 on the electrolyte layer.
  • the portion where the bus electrode is exposed is excluded.
  • the main electrodes 16 and 26 are disposed at the end portions where the bus electrodes 12 and 22 are exposed, as described in detail below.
  • the electrolyte used can be either liquid, gel or solid.
  • a sealant is used to prevent leakage.
  • the thickness of the device may be minimized by allowing the first and second electrodes to face each other with the electrolyte layer formed when the two types of electrodes are laminated into a sandwich type.
  • FIG. 4 is a view showing an electrochromic device according to a preferred embodiment of the present invention, which illustrates the formation of a main bus bar. 4, other elements are omitted for convenience of understanding.
  • the pattern shape or spacing of the bus electrodes 12 and 22 may vary depending on the shape and area of the device. In the case of small area, the stripe pattern alone may have the same discoloration speed in the same area, but in the case of a large area or a rectangular or asymmetric type device, the same pattern of cross stripe The effect can be obtained. In addition, since the pattern spacing of the bus electrodes 12 and 22 is affected by the thickness of the electrochromic layers 11 and 21, the thickness of the electrolyte layer 30, and the thickness of the pattern, an optimization process is required.
  • PB and WO 3 nanoelectrochromic thin films of 3 ⁇ 3 cm 2 (Comparative Example 1) and 100 ⁇ 100 cm 2 (Comparative Example 2) were prepared by the method according to Patent 10-1175607.
  • the screen frame was patterned on the electrochromic layers 11 and 21 by using a screen printing method, and then a silver paste solution was used. After coating, heat treatment was performed at 130 degrees for 30 minutes to form bus electrodes 12 and 22 on the electrochromic layers 11 and 21.
  • the busbar spacing of the stripe pattern was 3 cm (Example 1) and the busbar spacing of the cross stripe pattern was 6 cm (Example 2), and the line width was about 500 ⁇ m.
  • the insulating films 15 and 25 were formed by bonding a polyimide film after leaving portions where the main bus bars 16 and 26 were connected on the bus electrodes 12 and 22.
  • the second electrode portion 20 which is a WO 3 electrode, is faced in a sandwich type. After lamination. At this time, the patterns of the two electrodes were shifted.
  • the main bus bars 16 and 26 were attached to the exposed portions of the bus electrodes 12 and 22, and voltage was applied to the portions to confirm electrochromic characteristics. Comparative Example 1 was applied for 20 seconds at ⁇ 2V, Comparative Example 2 was applied for 30 minutes at ⁇ 2V, and Examples 1 and 2 were applied for 30 seconds at ⁇ 2V.
  • Table 1 below shows the electrochromic properties of the electrochromic devices prepared in Comparative Examples 1 and 2 and Examples 1 and 2 according to the present invention.
  • Comparative Examples 1 and 2 when the device area is 3 x 3 cm 2, the response time is within a few seconds, but when 100 x 100 cm 2, the response time is increased by 20 minutes or more, and the discoloration speed in the device is not constant. However, as shown in Examples 1 and 2, even if the area of the device was increased to 100 x 100 cm 2, the response time did not increase significantly.
  • FIG. 5 is a cross-sectional view schematically showing an electrochromic device according to another embodiment of the present invention.
  • the electrochromic device according to another embodiment of the present invention can be applied to mass production of small area devices in an easy manner.
  • the electrochromic layers 11 and 21 are disposed at corners thereof while the first electrode 10 and the second electrode 20 are disposed to be shifted with respect to the electrolyte layer 30. Expose the upper surface of.
  • First and second main bus electrodes 16 and 26 are disposed on corner portions of the exposed electrochromic layers 11 and 21, respectively.
  • This alternative configuration of the present invention is similar to the large area element of the present invention, in which the bus electrodes are not in direct contact with the conductive layers 13 and 23 but in contact with the electrochromic layers 11 and 21 in the conductive / electrochromic layer structure. It is. Conventionally, the bus electrode and the electrochromic layer are disposed on the conductive layer, but in the present invention, the main bus electrodes 16 and 26 are disposed on the electrochromic layers 11 and 21 and thus the electrochromic layers 11 and 21 and the electrochromic layers 11 and 21. Connected. In the case of small area, there is no difference in the electricity supply capacity even by this structure, and instead, there is an advantage that the mass production can be performed quickly using a roll-to-roll printing process. In FIG. 5, reference numerals 14 and 24 correspond to substrates, respectively.
  • a first electrode unit array plate 100 in which a plurality of first electrode units are arranged, and a second in which a plurality of second electrode units are arranged.
  • the electrode unit array plates 200 are formed, respectively.
  • the substrates 140 and 240 and the conductive layers 130 and 230 formed on the substrates 140 and 240 are illustrated as one layer.
  • conductive layers 130 and 230 are formed on substrates 140 and 240, such as PET, to form the first and second electrode array plates.
  • substrates 140 and 240 such as PET
  • the oxidizing electrochromic layer 110 is formed on the first electrode part 100
  • the reducing electrochromic layer 210 may be formed on the second electrode part 200.
  • the main bus electrodes 16 are disposed on the electrochromic layers 110 and 210 of the first and second electrode array plates 100 and 200, respectively.
  • Arrays 160, 260 are formed. This can be done using a method such as screen printing, and the plurality of main bus electrodes 16 and 26 are formed at the corners of the first electrode portion 10 and the second electrode portion 26 of the cut individual elements. Corresponds to the site.
  • the main bus electrodes 16 of the first electrode unit array plate 100 and the main bus electrodes 26 of the second electrode unit array plate 200 are opposite to each other based on the electrolyte layer 30 formed later. Is placed in position.
  • an electrolyte layer in which a plurality of electrolyte layers 30 are arranged on the electrochromic layers 110 and 210 of the first electrode unit array plate 100 or the second electrode unit array plate 200.
  • the array 300 is formed.
  • the formation of the electrolyte layer array 300 prints and coats the electrolyte layers 30 corresponding to adjacent positions of the main bus electrodes 26 as shown.
  • the first electrode unit array plate 100 and the second electrode unit array plate 200 are laminated.
  • the electrolyte layer 30 formed in the first or second electrode portion in the individual elements is placed inside the main bus electrodes 16, 26 of the first and second electrode portions 10, 20,
  • the main bus electrode 16 of the first electrode unit 10 and the main bus electrode 26 of the second electrode unit 20 are positioned at opposite positions with respect to each electrolyte layer 30.
  • the laminated structure is cut into individual elements. After cutting, it will be shaped like the top view and cross section shown on the right.
  • the corner portions on the opposite sides of the main bus electrodes 16 and 26 are removed in the first and second electrode portions 10 and 20 of the cut individual elements.
  • This part is to remove a part corresponding to the outer side of the electrolyte layer 30, and may be omitted if the two electrodes are treated so as not to contact each other.
  • forming an insulating layer on the main bus electrodes 16 and 26 can avoid contact between the two electrodes.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)

Abstract

La présente invention concerne un dispositif électrochrome fabriqué par un procédé pour former une électrode de bus sur une couche électrochrome. Une électrode de bus est formée directement sur la couche électrochrome au moyen d'un processus d'impression. Dans le cas d'un dispositif de petite surface, une électrode de bus principale est formée au niveau d'une partie de bord d'une première partie d'électrode et d'une seconde partie d'électrode. En outre, dans le cas d'un dispositif de grande surface, des réseaux d'électrodes de bus sont disposés au niveau d'une partie centrale de la couche électrochrome ainsi qu'au niveau des parties de bord, et un film isolant est formé sur les surfaces de celles-ci pour empêcher un contact direct entre une couche d'électrolyte et des électrodes de bus. Grâce à la formation d'une barre omnibus et d'une couche isolante sur la couche électrochrome, un dispositif électrochrome est obtenu, qui présente un taux de changement de couleur uniforme non seulement dans un dispositif électrochrome de petite surface, mais également dans un dispositif électrochrome de grande surface, et qui a un taux de réaction, dans le dispositif électrochrome de grande surface, sur lequel presque aucune influence n'est exercée par rapport à celui dans le dispositif électrochrome de petite surface.
PCT/KR2017/003075 2015-12-11 2017-03-22 Dispositif électrochrome, structure d'électrode correspondante, et son procédé de fabrication WO2017155373A1 (fr)

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KR10-2016-0028036 2016-03-09
KR1020160028036A KR101657965B1 (ko) 2015-12-11 2016-03-09 전기변색 소자, 그를 위한 전극구조체 및 그 제조 방법

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EP3457204A4 (fr) * 2016-05-09 2019-03-20 LG Chem, Ltd. Élément électrochrome
CN112558370A (zh) * 2020-12-22 2021-03-26 北京小米移动软件有限公司 电致变色模组、壳体及电子设备

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KR101801668B1 (ko) 2016-05-04 2017-11-28 립하이 주식회사 전기변색장치
KR20180067137A (ko) * 2016-12-12 2018-06-20 엘지이노텍 주식회사 전기변색소자
KR102070631B1 (ko) * 2017-03-21 2020-01-29 주식회사 엘지화학 전기변색소자
WO2018199566A1 (fr) * 2017-04-27 2018-11-01 주식회사 엘지화학 Dispositif électrochromique
KR102078402B1 (ko) 2017-04-27 2020-02-17 주식회사 엘지화학 전기변색소자
JP7060338B2 (ja) * 2017-05-12 2022-04-26 株式会社カネカ エレクトロクロミック素子
KR102536742B1 (ko) * 2017-11-10 2023-05-26 립하이 주식회사 전기변색장치
KR102499890B1 (ko) * 2020-09-29 2023-02-15 에스케이씨 주식회사 셀 분할 전기변색소자 및 이의 제조방법
CN116300237A (zh) * 2023-02-01 2023-06-23 赵世晴 一种基于复合电极的大尺寸电致变色器件及制备方法

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