KR20210079908A - Film based electrochromic devices - Google Patents

Abstract

The present invention relates to a film-based electrochromic device. More particularly, provided is the film-based electrochromic device, which is safe from leakage and short circuit risk even when used in water as a terminal electrode is located inside the laminated glass and can be used in various forms. The film-based electrochromic device includes a first film, a second film, a first transparent electrode, a second transparent electrode, an electrolyte layer, a first electrochromic layer, a second electrochromic layer, a first glass substrate, a bonding portion, and a pair of terminal electrodes.

Description

FILM BASED ELECTROCHROMIC DEVICES

The present invention relates to a film-based electrochromic device, and more particularly, to a film-based electrochromic device in which a terminal electrode is positioned inside a laminated glass and used for underwater use.

Conventionally, when manufacturing an aquarium including lighting, it was generally limited to a technique using an emissive diode. In addition, since the conventional glass-based electrochromic device has an externally exposed electrode, when used for a fish tank, there is a risk that the electrode may be exposed to the water inside the fish tank. As a result, there is a problem that water leakage or electric shock may occur.

Korea Public Utility Model Publication 20-2009-0004073

One technical problem to be solved by the present invention is to provide a film-based electrochromic device to which glass is bonded.

Another technical problem to be solved by the present invention is to provide a method for manufacturing a film-based electrochromic device in which glass is bonded.

The problems to be solved by the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

The glass-bonded film-based electrochromic device according to the present invention includes a first film 100 , a second film 110 spaced apart from the first film 100 , the first film 100 and the A first transparent electrode 200 disposed between the second film 110 and adjacent to the first film 100, disposed between the first film 100 and the second film 110, The second transparent electrode 210 adjacent to the second film 110, the electrolyte layer 350 interposed between the first transparent electrode 200 and the second transparent electrode 210, the first transparent electrode ( 200) and a first electrochromic layer 400 disposed between the electrolyte layer 350, and a second electrochromic layer 300 disposed between the second transparent electrode 210 and the electrolyte layer 350 may include, a first glass substrate 10 spaced apart from the first transparent electrode 200 with the first film 100 interposed therebetween, the first film 100 and the first glass substrate 10 ), and a pair of terminal electrodes 500 respectively connected to the first transparent electrode 200 and the second transparent electrode 210 .

According to an embodiment of the present invention, the film-based electrochromic device to which the glass is bonded includes a second glass substrate 11 spaced apart from the second transparent electrode 210 with the second film 110 interposed therebetween; A bonding portion 15 disposed between the second film 110 and the second glass substrate 11 may be included.

According to an embodiment of the present invention, the film-based electrochromic device to which the glass is bonded includes a water layer 5 spaced apart from the first transparent electrode 200 with the first glass substrate 10 interposed therebetween. Including, wherein the first glass substrate 10 is to protect a pair of terminal electrodes 500 respectively connected to the first transparent electrode 200 and the second transparent electrode 210 from the water layer (5) can

According to an embodiment of the present invention, the glass-bonded film-based electrochromic device may include a sealing agent 600 configured to seal the pair of terminal electrodes 500 .

According to an embodiment of the present invention, the glass-bonded film-based electrochromic device may include a third glass substrate 7 configured to seal the water layer 5 . The third glass substrate 7 may protect the water layer 5 and the first glass substrate 10 .

According to an embodiment of the present invention, the film-based electrochromic device may be an underwater electrochromic device.

According to an embodiment of the present invention, by applying a voltage to the first transparent electrode 200 and the second transparent electrode 210 , the first electrochromic layer 400 and the second electrochromic layer 300 are oxidized. The color of the electrochromic device may be adjusted to transparent or blue by a reduction reaction, and various colors may be adjusted by adjusting the brightness or saturation of the color.

According to an embodiment of the present invention, each of the first electrochromic layer 400 and the second electrochromic layer 300 is WO ₃ , NiO, Prussian blue (Pb), viologens, phenothiazine, and Prussian blue analogues (PBA). , methallophthalocyanides, vanadium oxide (V ₂ O ₅ ), polypyrroles, polythiophenes, polyanolines, and IrO ₂ .

According to an embodiment of the present invention, the bonding portion 15 may be a UV curing agent or a thermal curing agent.

According to an embodiment of the present invention, the first film 100 and the second film 110 are polyethylene terephthalate, polyethylene glycol, polyethylene, polyvinyl chloride, polypropylene, polyolefin, polyvinyl alcohol, polyurethane, Nylon, polycarbonate, polyester, polyacrylonitrile, polyacetal, polytetrafluoroethylene, fluorinated ethylene propylene, cyclic polyolefin, modified PPO, polyethylene terephthalate, acrylonitrile-butadiene-styrene resin, polymethyl It may include any one or more of methacrylate, polyethylene naphthalate, polyether sulfone, cyclic olefin polymer, TAC film, polyvinyl alcohol film, polyimide film, and polystyrene.

The method for manufacturing a film-based electrochromic device in which glass is bonded according to the present invention includes providing two film-based transparent electrode layer substrates, forming an oxide electrochromic layer on the film-based transparent electrode layer, and the film-based forming a reducing electrochromic layer on the transparent electrode layer of the, laminating the oxidation electrochromic layer and the reducing electrochromic layer by an electrolyte layer, and bonding a glass substrate to the film with a uv curing agent or a thermal curing agent may include

Since the film-based electrochromic device according to the present invention has a terminal electrode located inside the laminated glass, it is safe from the risk of leakage and leakage even when used in water, and can be bonded to a glass substrate of a curved as well as a flat surface. It can be used as an electrochromic device for various types of fish tanks, and its manufacturing method is economical and mass-produced.

1 is a cross-sectional view illustrating a film-based electrochromic device according to an embodiment of the present invention.
2A is a perspective view illustrating a film-based electrochromic device in which a glass substrate is bonded on both sides according to an embodiment of the present invention, and FIG. 2B is a film-based device in which a glass substrate is bonded on both sides according to an embodiment of the present invention. It is a cross-sectional view showing an electrochromic device.
3 is a cross-sectional view illustrating a film-based electrochromic device in which a glass substrate is bonded in a cross-section according to an embodiment of the present invention.
4 is a cross-sectional view illustrating a film-based electrochromic device in which a glass substrate including a sealing agent configured to seal a pair of terminal electrodes is bonded on both sides according to an embodiment of the present invention.
5 is a cross-sectional view illustrating a film-based electrochromic device in which a glass substrate including a sealing agent configured to seal a pair of terminal electrodes is bonded in a cross-section according to an embodiment of the present invention.
6A illustrates a film-based electrochromic device in a transparent state in a discoloration state of the film-based electrochromic device to which a voltage is applied.
6B shows a film-based electrochromic device in a blue state as a colored state of the film-based electrochromic device to which a voltage is applied.
7 shows transmittance spectra for coloring and discoloration of a film-based electrochromic device to which voltage is applied.
8 is a graph showing a change in transmittance spectrum with time of a film-based electrochromic device to which a voltage is applied, and FIG. 9 is an enlarged view of FIG. 8 .
10 shows a configuration module of a film-based electrochromic device according to an embodiment of the present invention.

Advantages and features of the present invention, and methods for achieving them, will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, only this embodiment allows the disclosure of the present invention to be complete, and common knowledge in the technical field to which the present invention belongs It is provided to fully inform the possessor of the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

The terminology used herein is for the purpose of describing the embodiments and is not intended to limit the present invention. As used herein, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, 'comprises' and/or 'comprising' refers to the presence of one or more other components, steps, operations and/or elements mentioned. or addition is not excluded.

Further, the embodiments described herein will be described with reference to cross-sectional and/or plan views, which are ideal illustrative views of the present invention. In the drawings, thicknesses of films and regions are exaggerated for effective description of technical content. Accordingly, the form of the illustrative drawing may be modified due to manufacturing technology and/or tolerance. Accordingly, the embodiments of the present invention are not limited to the specific form shown, but also include changes in the form generated according to the manufacturing process. Accordingly, the regions illustrated in the drawings have a schematic nature, and the shapes of the regions illustrated in the drawings are intended to illustrate specific shapes of regions of the device and not to limit the scope of the invention.

Unless otherwise defined, terms used in the embodiments of the present invention may be interpreted as meanings commonly known to those of ordinary skill in the art.

1 is a cross-sectional view illustrating an electrochromic device according to an embodiment of the present invention.

Referring to FIG. 1 , an electrochromic device according to an embodiment of the present invention includes a first film 100 , a second film 110 spaced apart from the first film 100 , and the first film 100 . ) and the second film 110 , the first transparent electrode 200 adjacent to the first film 100 , and disposed between the first film 100 and the second film 110 . and a second transparent electrode 210 adjacent to the second film 110 , an electrolyte layer 350 interposed between the first transparent electrode 200 and the second transparent electrode 210 , and the first A first electrochromic layer 400 disposed between the transparent electrode 200 and the electrolyte layer 350 , and a second electrochromic layer disposed between the second transparent electrode 210 and the electrolyte layer 350 ( 300 ), and a pair of terminal electrodes 500 respectively connected to the first transparent electrode 200 and the second transparent electrode 210 .

The upper surface of the first electrochromic layer 400 may be in contact with the lower surface of the first transparent electrode 200 , and the lower surface of the second electrochromic layer 300 is the second transparent electrode 200 . can be in contact with the upper surface of The length of the cross-section of the lower surface of the first transparent electrode 200 may be greater than the length of the cross-section of the upper surface of the first electrochromic layer 400 , and the length of the cross-section of the upper surface of the second transparent electrode 210 is The length may be greater than the length of the cross-section of the lower surface of the second electrochromic layer 300 .

The first transparent electrode 200 and the second transparent electrode 210 are left and right with each other with the first electrochromic layer 400 , the electrolyte layer 350 and the second electrochromic layer 300 interposed therebetween. , so that a portion of the lower surface of the first transparent electrode 200 and a portion of the upper surface of the second transparent electrode 210 may be exposed to the outside.

The pair of terminal electrodes (bus) including a cathode and an anode on a portion of the lower surface of the first transparent electrode 200 and a portion of the upper surface of the second transparent electrode 210 at both ends exposed to the outside bar) may be connected to each other. The pair of terminal electrodes may be a passage for supplying power and applying a voltage to the film-based electrochromic device.

A length between the first film 100 and the second film 110 may be 500 μm or less.

Each of the first transparent electrode 200 and the second transparent electrode 210 may have a thickness of 0.1 nm to 10 um.

The first film 100 and the second film 110 are polyethylene terephthalate (PET), polyethylene glycol (poly(ethylene glycol, PEG), polyethylene (PE), polyvinyl chloride (PVC), polypropylene (PP), polyolefin (PO), polyvinyl alcohol (PVA), polyurethane (PU), nylon, polycarbonate (PC), polyester, polyacrylonitrile (PAN), polyacetal (POM), polytetra Fluoroethylene (polytetrafluoroethylene, PTFE), fluorinated ethylene propylene (FEP), cyclic polyolefin (COP), modified PPO (MPPO), polyethylene terephthalate (PET), polycarbonate (Polycabonate, PC), acrylonitrile-butadiene-styrene copolymer (ABS), polymethyl methacrylate (PMMA), polyethylene naphthalate (PEN), polyethersulfone (Polyether Sulfone, PES), Cyclic Olefin Copolymer (COC), TAC (Triacetylcellulose) film, Polyvinyl alcohol (PVA) film, Polyimide (PI) film, textile, and polystyrene ( Polystyrene, PS) may include any one or more.

The first film 100 and the second film 110 may be flexible, and may be bonded to a glass substrate of a curved surface as well as a flat surface, so that the film-based electrochromic device according to an embodiment of the present invention may have various shapes, and specifically may be flat, curved, circular, oval, or round.

Each of the first electrochromic layer 400 and the second electrochromic layer 300 may include an electrochromic material capable of decolorizing or coloring, and may be an oxidation color change layer or a reduction color change layer. Specifically, WO ₃ , NiO, Prussian blue (Pb), viologens, phenothiazine, Prussian blue analogues (PBA), methallophthalocyanides, vanadium oxide (V ₂ O ₅ ), polypyrroles, polythiophenes, polyanolines, and any one of _{IrO 2 .} can

The electrolyte layer 350 may be an ion charge transfer path between the first transparent electrode 200 and the second transparent electrode 210 . The electrolyte layer 350 may be in a liquid, solid, or gel form, and may include at least one of a polymer, an organic molecule, an ionic liquid, a solvent, a lithium ion product, and a hydrogen ion product.

Specifically, the polymer is PEG (poly(ethylene glycol)), PMMA (Poly methyl methacrylate), PBA (Poly butyl Acrylate), PVB (Poly Vinyl Butyrate), PVA (Polyvinyl Alcohol), PEO (poly (ethylene oxide)), At least one of PPO (poly(propylene oxide)), PAN (poly acrylonitrile), PVDF (poly(vinylidene fluoride)), PVDF-HFP (poly(vinylidene fluoride-co-hexafluoropropylene)), and a block copolymer may include

The organic molecule, the ionic liquid, and the solvent are propylene carbonate (PC), butylene carbonate (BC), ethylene carbonate (EC), gamma-butyloactone (gamma-BL), gamma-VL, NMO, and dimethyl carbonate, respectively. (DMC), diethyl carbonate (DEC), ethylmethyl carbonate (EMC), propylmethyl carbonate (PMC), ethyl acetate (EA), ethylene blue (EB), water (water, HO), methylene blue (MB), morpholinium, imidazolium, quaternary ammonium, quaternary phosphonium, Br ^- , Cl ^- , NO ₃ ^- , BF ₄ ^- , and PF ₆ ^- may be included.

The lithium ion product is lithium perchlorate (LiClO4), LiBF4, LiPF6, LiAsF6, LiTf (lithium triflate, LiCF3SO3), LiIm (lithium Imdide, Li[N(SO2CF3)2]), LiBeTi(Li[N(SO2CF2CF3)2] ), LiBr, and LiI.

The hydrogen ion product may include one or more of hydrochloric acid (HCl), sulfuric acid (H2SO4), nitric acid (HNO3), phosphoric acid (H3PO4), acetic acid (CH3COOH), perchloric acid (HClO4), and formic acid (HCOOH).

The first transparent electrode 200 and the second transparent electrode 210 may include one or more electrode material layers. Specifically, the electrode material layer includes indium zinc oxide (IZO), indium tin oxide (ITO), fluorine doped tin oxide (FTO), aluminum doped zinc oxide (AZO), boron doped zinc oxide (BZO), and tungsten. Doped zinc oxide (WZO), tungsten doped tin oxide (WTO), gallium doped zinc oxide (GZO), antimony doped tin oxide (ATO), indium doped zinc oxide (IZO), and niobium (Nb) doped titanium oxide (TiOx), single oxide-metal-oxide (OMO, oxide-metal-oxide), multiple oxide-metal-oxide (OMO, oxide-metal-oxide), conductive polymer, conductive organic molecule, carbon nanotube, Graphene, silver nanowires, aluminum, silver, ruthenium, gold, platinum, tin, chromium, indium, zinc, copper, rubidium, nickel, ruthenium oxide, rubidium oxide, tin oxide, indium oxide, zinc oxide, chromium oxide and molybdenum may include one or more of

2A is a perspective view illustrating a film-based electrochromic device in which a glass substrate is bonded on both sides according to an embodiment of the present invention, and FIG. 2B is a cross-sectional view illustrating the electrochromic device of FIG. 2A.

2A and 2B , the electrochromic device according to an embodiment of the present invention includes a first film 100 , a second film 110 spaced apart from the first film 100 , and the first A first transparent electrode 200 disposed between the film 100 and the second film 110 and adjacent to the first film 100 , the first film 100 and the second film 110 ) A second transparent electrode 210 disposed between, adjacent to the second film 110, an electrolyte layer 350 interposed between the first transparent electrode 200 and the second transparent electrode 210, A first electrochromic layer 400 disposed between the first transparent electrode 200 and the electrolyte layer 350 , and a second electricity disposed between the second transparent electrode 210 and the electrolyte layer 350 . It may include a color-changing layer 300, the first glass substrate 10 spaced apart from the first transparent electrode 200 with the first film 100 interposed therebetween, the first film 100 and the first A bonding portion 15 disposed between one glass substrate 10, a second glass substrate 11 spaced apart from the second transparent electrode 210 with the second film 110 interposed therebetween, and the second film 110 ) and a bonding portion 15 disposed between the second glass substrate 11, and a pair of terminal electrodes 500 respectively connected to the first transparent electrode 200 and the second transparent electrode 210; can do.

The film-based electrochromic device may include a water layer 5 spaced apart from the first transparent electrode 200 with the first glass substrate 10 interposed therebetween, and the first glass substrate 10 . may protect the terminal electrode 500 connected to the second transparent electrode 210 from the water layer 5 .

The film-based electrochromic device may further comprise a third glass substrate configured to seal the water layer (5). The third glass substrate may protect the water layer 5 and the first glass substrate 10 .

A bonding portion 15 may be disposed between the first film 100 and the first glass substrate 10 , and a bonding portion 15 between the second film 110 and the second glass substrate 11 . can be placed. The first film 100 and the first glass substrate 10 may be bonded by a thermal curing agent or a light curing agent, and the second film 200 and the second glass substrate 11 may be bonded by a thermal curing agent or a light curing agent. It can be joined by a curing agent.

The pair of terminal electrodes (bus) including a cathode and an anode on a portion of the lower surface of the first transparent electrode 200 and a portion of the upper surface of the second transparent electrode 210 at both ends exposed to the outside bar) 500 may be connected to each other. The pair of terminal electrodes 500 may be a passage for supplying power and applying a voltage to the film-based electrochromic device.

The pair of terminal electrodes 500 may be a metal including copper (Cu) or silver (Ag), or a transparent conductive film or tape including carbon.

Referring to FIG. 2A , the first transparent electrode 200 may be disposed to be spaced apart from the first glass substrate 10 in a first direction. The pair of terminal electrodes 500 may be disposed in contact with the first transparent electrode 200 in a first direction D1 , and may be disposed in a first direction rather than one side surface 200S of the first transparent electrode 200 . It may be further protruded in the third direction D3 intersecting the .

The bonding portion 15 may be a photocuring agent or a thermal curing agent.

As used herein, the term electrochromic may refer to a phenomenon in which the optical state of the electrochromic material is reversibly colored or decolorized depending on the oxidation or reduction state of the material.

The bonded first glass substrate 10 and the second glass substrate 11 may support or protect the film-based electrochromic device from external impact or wrinkling. In addition, since it can be in contact with the water layer 5 , when electricity is applied to the film-based electrochromic device, the bonded glass substrates 10 and 11 prevent the terminal electrode from contacting the water inside the fish tank and are waterproof , leakage, or short circuit can be prevented.

The film-based electrochromic device may be an underwater electrochromic device, and specifically may be for a fish tank, a water tank, or an aquarium.

The film-based electrochromic device may be a non-emissive electrochromic device.

The film-based electrochromic device according to an embodiment of the present invention may be driven by applying a low voltage, and the amount or color of transmitted light may be adjusted by controlling the voltage. Specifically, by applying a voltage to the first transparent electrode 200 and the second transparent electrode 210 , the electricity is generated by the redox reaction of the first electrochromic layer 400 and the second electrochromic layer 300 . The color of the discoloration device may be adjusted to be transparent or blue, and various colors may be adjusted by adjusting the brightness or saturation of the color.

Except for the above-described differences, the film-based electrochromic device according to the present embodiments is substantially the same as the film-based electrochromic device described with reference to FIG. 1 .

3 is a cross-sectional view illustrating a film-based electrochromic device in which a glass substrate is bonded in a cross-section according to an embodiment of the present invention.

Referring to FIG. 3 , the electrochromic device according to an embodiment of the present invention includes a first film 100 , a second film 110 spaced apart from the first film 100 , and the first film 100 . ) and the second film 110 , the first transparent electrode 200 adjacent to the first film 100 , and disposed between the first film 100 and the second film 110 . and a second transparent electrode 210 adjacent to the second film 110 , an electrolyte layer 350 interposed between the first transparent electrode 200 and the second transparent electrode 210 , and the first A first electrochromic layer 400 disposed between the transparent electrode 200 and the electrolyte layer 350 , and a second electrochromic layer disposed between the second transparent electrode 210 and the electrolyte layer 350 ( 300), a first glass substrate 10 spaced apart from the first transparent electrode 200 with the first film 100 interposed therebetween, between the first film 100 and the first glass substrate 10 It may include a bonding portion 15 disposed therein, and a pair of terminal electrodes 500 respectively connected to the first transparent electrode 200 and the second transparent electrode 210 .

The film-based electrochromic device may further comprise a third glass substrate configured to seal the water layer (5). The third glass substrate may protect the water layer 5 and the first glass substrate 10 .

That is, the electrochromic device according to an embodiment of the present invention does not include the second glass substrate 11 and the bonding portion 15 for bonding the second glass substrate 11 and the second film 110 . may not be Except for the above-described differences, the film-based electrochromic device according to the present embodiments is substantially the same as the film-based electrochromic device described with reference to FIG. 1 .

4 is a cross-sectional view illustrating a film-based electrochromic device in which a glass substrate is bonded on both sides according to an embodiment of the present invention.

Referring to FIG. 4 , the film-based electrochromic device may include a sealant 600 configured to seal the pair of terminal electrodes 500 . The pair of terminal electrodes 500 may be sealed by the sealing agent 600 , and the pair of terminal electrodes 500 may be prevented from coming into contact with external air. The sealing agent 600 may include a polymer, for example, siloxane, silane, or epoxy.

The film-based electrochromic device may further comprise a third glass substrate (7) configured to seal the water layer (5). The third glass substrate 7 may protect the water layer 5 and the first glass substrate 10 .

Except for the above-described differences, the film-based electrochromic device according to the present embodiments is substantially the same as the film-based electrochromic device described with reference to FIG. 1 .

5 is a cross-sectional view illustrating a film-based electrochromic device in which a glass substrate is bonded in a cross-section according to an embodiment of the present invention.

The film-based electrochromic device may further comprise a third glass substrate configured to seal the water layer (5). The third glass substrate may protect the water layer 5 and the first glass substrate 10 .

The second glass substrate 11 and the bonding portion 15 for bonding the second glass substrate 11 and the second film 110 may not be included. Except for the above-described differences, the film-based electrochromic device according to the present embodiments is substantially the same as the film-based electrochromic device described with reference to FIG. 1 .

The method of manufacturing a film-based electrochromic device according to an embodiment of the present invention may include providing two film-based transparent electrode layer substrates.

2A and 2B , the first transparent electrode 200 substrate based on the first film 100 and the second transparent electrode 210 substrate based on the second film 110 may be prepared.

The method of manufacturing a film-based electrochromic device according to an embodiment of the present invention may include forming an oxidized electrochromic layer on the film (100, 110)-based transparent electrode (200, 210) layer, It may include forming a reduction electrochromic layer on the film (100, 110)-based transparent electrode (200, 210) layer.

Referring to FIGS. 2A and 2B , the first film 100 and the second film 110 may be each prepared by coating an oxidative color material or a reductive color material respectively. The coating of the color-changing material may be prepared by a wet process or a vacuum process. Specifically, the reductive color layer may be formed by a vacuum process of sputtering, or a wet process of wire bar or slot die coating. The electrochromic layer may be formed by a wet process of coating a wire bar and a slot die.

The method of manufacturing a film-based electrochromic device according to an embodiment of the present invention may include laminating the oxidation electrochromic layer and the reduced electrochromic layers 300 and 400 by an electrolyte layer 350 . .

Referring to FIGS. 2A and 2B , the reduction electrochromic layer and the oxidation electrochromic layer 300 and 400 may be laminated using an electrolyte layer 350 . The electrolyte layer 350 may be laminated using a polymer gel electrolyte using a slot-die wet coating method of R2R. The process of laminating the reduction electrochromic layer and the oxidation electrochromic layer 300 and 400 may include a heat treatment process, and the heat treatment may increase the gel viscosity and adhesiveness of the polymer electrolyte layer.

In the method of manufacturing a film-based electrochromic device according to an embodiment of the present invention, a portion of a lower surface of the first transparent electrode 200 and an upper portion of the second transparent electrode 210 at both ends exposed to the outside It may include connecting the pair of terminal electrodes (bus bar) 500 including a cathode and an anode to a part of the surface, respectively.

The method of manufacturing a film-based electrochromic device according to an embodiment of the present invention may include bonding a glass substrate to the film with a UV curing agent or a thermal curing agent.

2A and 2B, the step of bonding the glass substrate to the film is between the first glass substrate 10 and the first film 100 and the second glass substrate 11 and the second film. After disposing an acryl uv curing agent between 110, bonding the first glass substrate 10 and the first film 100 by uv curing by irradiating uv, and the second It may include bonding the glass substrate 11 and the second film 110 .

Bonding the first glass substrate 10 and the first film 100 and bonding the second glass substrate 11 and the second film 110 are sequentially bonded or simultaneously can be joined.

The step of bonding the glass substrate to the film is performed between the first glass substrate 10 and the first film 100 and between the second glass substrate 11 and the second film 110 (ethylene vinyl EVA). After disposing a thermal curing agent of acetate), PVA (polyvinylacetate) or PVB (polyvinyl butyral), bonding the first glass substrate 10 and the first film 100 by thermal curing. , bonding the second glass substrate 11 and the second film 110 to each other.

Specifically, the thermal curing may include a secondary autoclave bonding process after primary heat treatment bonding is performed by applying heat. The autoclave is a device capable of performing a low pressure and heating process, and may include a secondary bonding process through a low pressure and heating process.

Bonding the first glass substrate 10 and the first film 100 and bonding the second glass substrate 11 and the second film 110 are sequentially bonded or simultaneously can be joined.

Example 1: Fabrication of a film-based electrochromic device

An ITO PET film substrate having a sheet resistance of 30 ohms was prepared, and a low-viscosity WO ₃ particle solution was wet-coated with a wire bar _{to prepare a WO 3} reduced color change layer thin film. _{The WO 3} reduced color change layer thin film was dried through a heat treatment process.

An ITO PET film substrate having a sheet resistance of 30 ohms was prepared, and a low-viscosity prussian blue particle solution was wet-coated with a wire bar to prepare a prussian blue oxidized discoloration layer thin film. The prussian blue oxidized discoloration layer thin film was dried through a heat treatment process.

After that, an electrolyte containing Li + ions and PVB polymer was coated on the dried thin film using a blade bar. After coating the electrolyte, it was dried through heat treatment at 80° C. for 1 minute to remove residual solvent. The polymer gel electrolyte was coated to a thickness of 200 μm before drying, and the thickness after drying was measured to be about 40 μm. A high-viscosity gel electrolyte was purchased and used (Adcro Co., Ltd., Busan, Korea). The viscosity of the gel electrolyte was about 2500 cp, and the ionic conductivity was 0.2 Scm ^-1 .

Next, the prussian blue oxidative discoloration layer and the WO ₃ reductive discoloration layer were laminated through a lamination process. The coating film was formed by R2R slot die. The size of the electrochromic device was measured to be 600 mm wide and 310 mm long.

Example 2: Driving images of coloring and decolorization

6A and 6B show driving images of coloring and discoloration of an electrochromic device in which voltages were applied for 900 seconds at a coloring voltage of -2V and a coloring voltage of 2V, respectively. In the colored state, blue as shown in FIG. 6B is shown, and in the discolored state, it is transparent as in FIG.

Example 3: Measurement of transmittance spectrum

7 to 9 show transmittance spectra for coloring and decolorization of an electrochromic device in which a voltage of 900 seconds was applied at a coloring voltage of -2V and a coloration voltage of 2V, respectively.

Referring to FIG. 7 , the color transmittance at a wavelength of 650 nm was 1.7%, and the color transmittance was 70.3%. (a: transmittance at the center of the device at 650 nm wavelength in the initialized state, b: transmittance at the edge of the device at 650 nm wavelength in the initialized state, c: transmittance at the center of the device at the decolorization voltage of 2V, d: the device at the coloring voltage -2V Transmittance of the center, e: Transmittance of the edge of the device at a coloring voltage of -2V)

Referring to FIGS. 8 and 9, which is an enlarged portion of FIGS. 8 and 8 , it can be seen that the color change rate at a wavelength of 650 nm is measured at 451 seconds, and it can be confirmed that the color change rate is measured at 514 seconds.

10 shows a configuration module of a film-based electrochromic device system according to an embodiment of the present invention. Referring to FIG. 10 , the electrochromic device system according to an embodiment of the present invention may include an electrochromic device 1000 , a controller 1100 , a sensor 1200 , a switch 1300 , and a timer 1400 .

The controller 1100 may control the operation of the electrochromic device 1000 , and may generally manage functions of the sensor 1200 , the switch 1300 , and the timer 1400 . The sensor 1200 may detect an external signal or motion. The switch 1300 may receive a power voltage required for operation, and when the switch 1400 is on, it supplies power required in the device, and when the switch 1400 is off, it is supplied into the device. power will be cut off. The timer 1400 may set a time.

As mentioned above, although embodiments of the present invention have been described with reference to the accompanying drawings, those of ordinary skill in the art to which the present invention pertains can implement the present invention in other specific forms without changing its technical spirit or essential features. You will understand that there is Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive.

Claims (1)

a first film;
a second film disposed to be spaced apart from the first film;
a first transparent electrode disposed between the first film and the second film and adjacent to the first film;
a second transparent electrode disposed between the first film and the second film and adjacent to the second film;
an electrolyte layer interposed between the first transparent electrode and the second transparent electrode;
a first electrochromic layer disposed between the first transparent electrode and the electrolyte layer;
a second electrochromic layer disposed between the second transparent electrode and the electrolyte layer;
a first glass substrate spaced apart from the first transparent electrode with the first film interposed therebetween;
a bonding portion disposed between the first film and the first glass substrate; and
A film-based electrochromic device comprising a pair of terminal electrodes respectively connected to the first transparent electrode and the second transparent electrode.

Images