KR20240020433A - electrochromic device and window apparatus - Google Patents

Abstract

Examples include a first substrate; a second substrate facing the first substrate and disposed on the first substrate; a first transparent electrode layer disposed between the first substrate and the second substrate; a second transparent electrode layer disposed between the first substrate and the second substrate and facing the first transparent electrode layer; an electrochromic portion disposed between the first transparent electrode layer and the second transparent electrode layer; and a light transmission adjusting unit disposed between the first substrate and the second substrate and including a light transmission area and a light blocking pattern disposed around the light transmission area.

Description

Electrochromic device and window apparatus including the same {electrochromic device and window apparatus}

The embodiment relates to an electrochromic device.

Electrochromic film is a film whose color changes due to coloring and decolorization due to oxidation-reduction reactions at each anode and cathode due to an applied potential. It is a film that allows the user to artificially control visible light and infrared light, and is available in a variety of types. Inorganic oxides are used as electrode materials.

Various electrochromic films as described above have been developed and applied for patents. Looking at the contents of the patent applications, Korea Patent Publication No. 2001-0087586 discloses a film in which a conductive indium-tin oxide thin film is deposited on a glass film. MoO3, a reduced color oxide, is deposited on one of the two ITO films (1A, 1B), and WO3, a reduced color oxide, is deposited on the other, and then a lithium-based solid electrolyte, an alkali metal, is deposited on it. Polyaniline, a conductive polymer, is put between the two sheets and passed through a high-frequency compression roller to produce a film that changes from transparent to blue when voltage is applied. In Domestic Registered Utility Model Publication No. 0184841, indium-tinoxide is deposited on a 0.05 mm thick glass film. After that, WO3, a reduced coloring material, and IrO2, an oxidized coloring material, are deposited on both sides of the transition metal oxide film with α-PEO copolymer, a polymer solid electrolyte, in between, and combined with a high-frequency roller. Discoloration films are known.

The embodiment aims to provide an electrochromic device that has improved durability, prevents glare caused by light reflection, appropriately adjusts transmittance, and reduces distortion to the external scenery.

An electrochromic device according to an embodiment includes a first substrate; a second substrate facing the first substrate and disposed on the first substrate; a first transparent electrode layer disposed between the first substrate and the second substrate; a second transparent electrode layer disposed between the first substrate and the second substrate and facing the first transparent electrode layer; an electrochromic portion disposed between the first transparent electrode layer and the second transparent electrode layer; and a light transmission adjusting unit disposed between the first substrate and the second substrate and including a light transmission area and a light blocking pattern disposed around the light transmission area.

In one embodiment, the electrochromic unit includes a first color-changing layer disposed on the first transparent electrode layer; It may include an electrolyte layer disposed on the first discoloration layer and a second discoloration layer disposed on the electrolyte layer.

In one embodiment, the light blocking pattern may have an optical density of 3.0 to 10.

In one embodiment, the light blocking pattern may have an L* of 0 to 30.

In one embodiment, the width of the light-shielding pattern may be 1 μm to 100 μm, and the pitch of the light-shielding pattern may be about 0.5 mm to about 10 mm.

In one embodiment, the light transmission control unit may be disposed between the first transparent electrode layer and the electrochromic unit.

In one embodiment, the light transmission control unit includes: a first light transmission control unit disposed between the first transparent electrode layer and the electrochromic unit; and a second light transmission control unit disposed between the second transparent electrode layer and the electrochromic unit.

In one embodiment, the light blocking pattern may include dye, pigment, or a mixture thereof.

In one embodiment, the light blocking pattern may include carbon black.

In the electrochromic device according to one embodiment, the reflectance in a discolored state may be about 3% to about 8%.

In the electrochromic device according to one embodiment, the glossiness in a decolorized state may be about 100 GU to about 140 GU.

An electrochromic device according to an embodiment includes a first substrate; a second substrate facing the first substrate and disposed on the first substrate; a first transparent electrode layer disposed between the first substrate and the second substrate; a second transparent electrode layer disposed between the first substrate and the second substrate and facing the first transparent electrode layer; and an electrochromic portion disposed between the first transparent electrode layer and the second transparent electrode layer, wherein the reflectance in a decolorized state measured through the first substrate is about 3% to about 8%, and the electrochromic portion is disposed between the first transparent electrode layer and the second transparent electrode layer. The measured glossiness is about 100 GU to about 140 GU.

A window device according to an embodiment includes a frame; a window mounted on the frame; And it may include the electrochromic element disposed in the window.

The electrochromic device according to the embodiment includes a light transmission control unit. The light transmission control unit includes a light transmission area and a light blocking pattern. Accordingly, the electrochromic device according to the embodiment can transmit light with an appropriate transmittance through the light transmission area. Additionally, the electrochromic device according to the embodiment can appropriately adjust reflectance and glossiness through the light-shielding pattern.

Accordingly, the electrochromic device according to the embodiment can lower the reflectance of incident light through the light transmission control unit. Additionally, the electrochromic device according to the embodiment may have appropriate glossiness. Accordingly, the electrochromic device according to the embodiment can reduce glare.

In particular, because the light-shielding pattern has an appropriate width, an appropriate height, and an appropriate pitch, the electrochromic device according to the embodiment can minimize distortion of the external scenery while having appropriate reflectance and appropriate glossiness.

Additionally, the light blocking pattern can appropriately reduce external light incident on the electrochromic unit. Accordingly, the light-shielding pattern can efficiently protect the electrochromic unit from external light.

Accordingly, the electrochromic device according to the embodiment may have improved durability.

1 is a plan view showing an electrochromic device according to an embodiment.
Figure 2 is a cross-sectional view showing a cross-section of an electrochromic device according to an embodiment cut in the width direction.
Figures 3 to 7 are diagrams showing the process of manufacturing an electrochromic device according to an embodiment.
Figure 8 is a cross-sectional view showing an electrochromic device according to another embodiment.
Figure 9 is a cross-sectional view showing an electrochromic device according to another embodiment.
Figure 10 is a diagram illustrating a window device according to an embodiment.

In the description of the embodiment, when each part, surface, layer, or substrate is described as being formed “on” or “under” each part, surface, layer, or substrate, “On” and “under” include those formed “directly” or “indirectly” through other elements. In addition, the standards for the top or bottom of each component are explained based on the drawings. The size of each component in the drawings may be exaggerated for explanation and does not indicate the actual size.

1 is a plan view showing an electrochromic device according to an embodiment. Figure 2 is a cross-sectional view showing a cross-section of an electrochromic device according to an embodiment cut in the width direction.

1 and 2, the electrochromic device 10 according to the embodiment includes a first substrate 100, a second substrate 200, a first transparent electrode 300, a second transparent electrode 400, It includes an electrochromic unit 20 and a light transmission control unit 800. Additionally, the electrochromic portion 20 includes a first color change layer 500, a second color change layer 600, and an electrolyte layer 700.

The first substrate 100, together with the second substrate 200, includes the first transparent electrode 300, the first color changing layer 500, the second color changing layer 600, and the second transparent electrode. (400) and supports the electrolyte layer (700).

In addition, the first substrate 100, together with the second substrate 200, includes the first transparent electrode 300, the first color change layer 500, the second color change layer 600, and the second transparent electrode 300. The electrode 400 and the electrolyte layer 700 are sandwiched. The first substrate 100, together with the second substrate 200, includes the first transparent electrode 300, the first color changing layer 500, the second color changing layer 600, and the second transparent electrode ( 400) and the electrolyte layer 700 can be protected from external physical and chemical shock.

The first substrate 100 may include polymer resin. The first substrate 100 may include at least one from the group consisting of polyester-based resin, polyimide-based resin, cyclic olefin polymer resin, polyethersulfone, polycarbonate, or polyolefin-based resin.

The first substrate 100 may include polyester resin as a main component. The first substrate 100 may include polyethylene terephthalate. The first substrate 100 may contain polyethylene terephthalate in an amount of about 90 wt% or more based on the total composition. The first substrate 100 may contain polyethylene terephthalate in an amount of about 95 wt% or more based on the total composition. The first substrate 100 may contain polyethylene terephthalate in an amount of about 97 wt% or more based on the total composition. The first substrate 100 may contain polyethylene terephthalate in an amount of about 98 wt% or more based on the total composition.

The first substrate 100 may include a uniaxially or biaxially stretched polyethylene terephthalate film. The first substrate 100 may include a polyethylene terephthalate film stretched about 2 to about 5 times in the longitudinal direction and/or the width direction.

The first substrate 100 may have high mechanical properties to reinforce the glass when applied to the windows of a building or vehicle.

The first substrate 100 may have a tensile strength of about 7 kgf/mm2 to about 40 kgf/mm2 in the longitudinal direction. The first substrate 100 may have a tensile strength of about 8 kgf/mm2 to about 35 kgf/mm2 in the longitudinal direction.

The first substrate 100 may have a tensile strength of about 7 kgf/mm2 to about 40 kgf/mm2 in the width direction. The first substrate 100 may have a tensile strength of about 8 kgf/mm2 to about 35 kgf/mm2 in the width direction.

The first substrate 100 may have a modulus of about 200 kgf/mm2 to about 400 kgf/mm2 in the longitudinal direction. The first substrate 100 may have a modulus of about 250 kgf/mm2 to about 350 kgf/mm2 in the longitudinal direction. The first substrate 100 may have a modulus of about 250 kgf/mm2 to about 270 kgf/mm2 in the longitudinal direction.

The first substrate 100 may have a modulus of about 200 kgf/mm2 to about 400 kgf/mm2 in the width direction. The first substrate 100 may have a modulus of about 250 kgf/mm2 to about 350 kgf/mm2 in the width direction. The first substrate 100 may have a modulus of about 250 kgf/mm2 to about 270 kgf/mm2 in the width direction.

The first substrate 100 may have an elongation at break of about 30% to about 150% in the longitudinal direction. The first substrate 100 may have an elongation at break of about 30% to about 130% in the longitudinal direction. The first substrate 100 may have an elongation at break of about 40% to about 120% in the longitudinal direction.

The first substrate 100 may have an elongation at break of about 30% to about 150% in the longitudinal direction. The first substrate 100 may have an elongation at break of about 30% to about 130% in the longitudinal direction. The first substrate 100 may have an elongation at break of about 40% to about 120% in the longitudinal direction.

The first substrate 100 may have an elongation at break of about 30% to about 150% in the width direction. The first substrate 100 may have an elongation at break of about 30% to about 130% in the width direction. The first substrate 100 may have an elongation at break of about 40% to about 120% in the width direction.

The modulus, the elongation at break and the tensile strength can be measured according to KS B 5521.

Additionally, the modulus, tensile strength, and elongation at break can be measured by ASTM D882.

Because the first substrate 100 has the improved mechanical strength as described above, the first transparent electrode 300, the second transparent electrode 400, the first color change layer 500, and the second color change layer (600) and the electrolyte layer 700 can be efficiently protected. Additionally, because the first substrate 100 has improved mechanical strength as described above, it can efficiently reinforce the mechanical strength of the glass to which it is to be attached.

Additionally, the first substrate 100 may have high chemical resistance. Accordingly, even if the electrolyte contained in the electrolyte leaks to the first substrate 100, damage to the surface of the first substrate 100 can be minimized.

The first substrate 100 may have improved optical properties. The total light transmittance of the first substrate 100 may be about 55% or more. The total light transmittance of the first substrate 100 may be about 70% or more. The total light transmittance of the first substrate 100 may be about 75% to about 99%. The total light transmittance of the first substrate 100 may be about 80% to about 99%.

The haze of the first substrate 100 may be about 20% or less. It may be from about 0.1% to about 20%. The haze of the first substrate 100 may be about 0.1% to about 10%. The haze of the first substrate 100 may be about 0.1% to about 7%.

The total light transmittance and the haze can be measured by ASTM D 1003, etc.

Since the first substrate 100 has appropriate total light transmittance and haze, the electrochromic device according to the embodiment can have improved optical properties. That is, because the first substrate 100 has appropriate transmittance and haze, the electrochromic device according to the embodiment is applied to the window, appropriately adjusting the transmittance, minimizing distortion of the image from the outside, and improving appearance. You can have

Additionally, the first substrate 100 may have an in-plane retardation of about 100 nm to about 4000 nm. The first substrate 100 may have an in-plane retardation of about 200 nm to about 3500 nm. The first substrate 100 may have an in-plane retardation of about 200 nm to about 3000 nm.

The first substrate 100 may have an in-plane retardation of about 7000 nm or more. The first substrate 100 may have an in-plane retardation of about 7000 nm to about 50000 nm. The first substrate 100 may have an in-plane retardation of about 8000 nm to about 20000 nm.

The in-plane phase difference can be derived from the refractive index and thickness depending on the direction of the first substrate 100.

Since the first substrate 100 has the above-described in-plane retardation, the electrochromic film according to the embodiment may have an improved appearance.

The thickness of the first substrate 100 may be about 10 μm to about 200 μm. The thickness of the first substrate 100 may be about 23 μm to about 150 μm. The thickness of the first substrate 100 may be about 30 μm to about 120 μm.

The first substrate 100 may include organic or inorganic filler. The organic or inorganic filler may function as an anti-blocking agent.

The average particle diameter of the filler may be about 0.1 μm to about 5 μm. The average particle diameter of the filler may be about 0.1 μm to about 3 μm. The average particle diameter of the filler may be about 0.1 μm to about 1 μm.

The filler may be selected from at least one group consisting of silica particles, barium sulfate particles, alumina particles, or titania particles.

Additionally, the filler may be included in the first substrate 100 in an amount of about 0.01 wt% to about 3 wt% based on the entire first substrate 100. The filler may be included in the first substrate 100 in an amount of about 0.05 wt% to about 2 wt% based on the entire first substrate 100.

The first substrate 100 may have a single-layer structure. For example, the first substrate 100 may be a single-layer polyester film.

The first substrate 100 may have a multilayer structure. For example, the first substrate 100 may be a multilayer co-extruded film. The multilayer coextruded structure may include a center layer, a first surface layer, and a second surface layer. The filler may be included in the first surface layer and the second surface layer.

The second substrate 200 faces the first substrate 100. The second substrate 200 is disposed on the first substrate 100. One end of the second substrate 200 may be arranged to be offset from one end of the first substrate 100 . The other end of the second substrate 200 may be arranged to be offset from the other end of the first substrate 100.

The second substrate 200 includes the first substrate 100, the first transparent electrode 300, the first color changing layer 500, the second color changing layer 600, and the second transparent electrode. (400) and supports the electrolyte layer (700).

In addition, the second substrate 200, together with the first substrate 100, includes the first transparent electrode 300, the first color changing layer 500, the second color changing layer 600, and the second transparent electrode 300. The electrode 400 and the electrolyte layer 700 are sandwiched. The second substrate 200, together with the first substrate 100, includes the first transparent electrode 300, the first color changing layer 500, the second color changing layer 600, and the second transparent electrode ( 400) and the electrolyte layer 700 can be protected from external physical and chemical shock.

The second substrate 200 may include polymer resin. The second substrate 200 may include at least one from the group consisting of polyester-based resin, polyimide-based resin, cyclic olefin polymer resin, polyethersulfone, polycarbonate, or polyolefin-based resin.

The second substrate 200 may include polyester resin as a main component. The second substrate 200 may include polyethylene terephthalate. The second substrate 200 may contain polyethylene terephthalate in an amount of about 90 wt% or more based on the total composition. The second substrate 200 may contain polyethylene terephthalate in an amount of about 95 wt% or more based on the total composition. The second substrate 200 may contain polyethylene terephthalate in an amount of about 97 wt% or more based on the total composition. The second substrate 200 may contain polyethylene terephthalate in an amount of about 98 wt% or more based on the total composition.

The second substrate 200 may include a uniaxially or biaxially stretched polyethylene terephthalate film. The second substrate 200 may include a polyethylene terephthalate film stretched about 2 to about 5 times in the longitudinal direction and/or the width direction.

The second substrate 200 may have high mechanical properties to reinforce the glass when applied to the windows of a building or vehicle.

The second substrate 200 may have a tensile strength of about 7 kgf/mm2 to about 40 kgf/mm2 in the longitudinal direction. The second substrate 200 may have a tensile strength of about 8 kgf/mm2 to about 35 kgf/mm2 in the longitudinal direction.

The second substrate 200 may have a tensile strength of about 7 kgf/mm2 to about 40 kgf/mm2 in the width direction. The second substrate 200 may have a tensile strength of about 8 kgf/mm2 to about 35 kgf/mm2 in the width direction.

The second substrate 200 may have a modulus of about 200 kgf/mm2 to about 400 kgf/mm2 in the longitudinal direction. The second substrate 200 may have a modulus of about 250 kgf/mm2 to about 350 kgf/mm2 in the longitudinal direction. The second substrate 200 may have a modulus of about 250 kgf/mm2 to about 270 kgf/mm2 in the longitudinal direction.

The second substrate 200 may have a modulus of about 200 kgf/mm2 to about 400 kgf/mm2 in the width direction. The second substrate 200 may have a modulus of about 250 kgf/mm2 to about 350 kgf/mm2 in the width direction. The second substrate 200 may have a modulus of about 250 kgf/mm2 to about 270 kgf/mm2 in the width direction.

The second substrate 200 may have an elongation at break of about 30% to about 150% in the longitudinal direction. The second substrate 200 may have an elongation at break of about 30% to about 130% in the longitudinal direction. The second substrate 200 may have an elongation at break of about 40% to about 120% in the longitudinal direction.

The second substrate 200 may have an elongation at break of about 30% to about 150% in the longitudinal direction. The second substrate 200 may have an elongation at break of about 30% to about 130% in the longitudinal direction. The second substrate 200 may have an elongation at break of about 40% to about 120% in the longitudinal direction.

The second substrate 200 may have an elongation at break of about 30% to about 150% in the width direction. The second substrate 200 may have an elongation at break of about 30% to about 130% in the width direction. The second substrate 200 may have an elongation at break of about 40% to about 120% in the width direction.

Because the second substrate 200 has the improved mechanical strength as described above, the first transparent electrode 300, the second transparent electrode 400, the first color changing layer 500, and the second color changing layer (600) and the electrolyte layer 700 can be efficiently protected. Additionally, because the second substrate 200 has improved mechanical strength as described above, it can efficiently reinforce the mechanical strength of the glass to which it is to be attached.

Additionally, the second substrate 200 may have high chemical resistance. Accordingly, even if the electrolyte contained in the electrolyte leaks to the second substrate 200, damage to the surface of the second substrate 200 can be minimized.

The second substrate 200 may have improved optical properties. The total light transmittance of the second substrate 200 may be about 55% or more. The total light transmittance of the second substrate 200 may be about 70% or more. The total light transmittance of the second substrate 200 may be about 75% to about 99%. The total light transmittance of the second substrate 200 may be about 80% to about 99%.

The haze of the second substrate 200 may be about 20% or less. It may be from about 0.1% to about 20%. The haze of the second substrate 200 may be about 0.1% to about 10%. The haze of the second substrate 200 may be about 0.1% to about 7%.

Since the second substrate 200 has appropriate total light transmittance and haze, the electrochromic device according to the embodiment can have improved optical properties. That is, because the second substrate 200 has appropriate transmittance and haze, the electrochromic device according to the embodiment is applied to the window, appropriately adjusting the transmittance, minimizing distortion of the image from the outside, and improving appearance. You can have

Additionally, the second substrate 200 may have an in-plane retardation of about 100 nm to about 4000 nm. The second substrate 200 may have an in-plane retardation of about 200 nm to about 3500 nm. The second substrate 200 may have an in-plane retardation of about 200 nm to about 3000 nm.

The second substrate 200 may have an in-plane retardation of about 7000 nm or more. The second substrate 200 may have an in-plane retardation of about 7000 nm to about 50000 nm. The second substrate 200 may have an in-plane retardation of about 8000 nm to about 20000 nm.

The in-plane retardation may be derived from the refractive index and thickness of the second substrate 200 according to its direction.

Since the second substrate 200 has the above-described in-plane retardation, the electrochromic device according to the embodiment may have an improved appearance.

The thickness of the second substrate 200 may be about 10 μm to about 200 μm. The thickness of the first substrate 100 may be about 23 μm to about 150 μm. The thickness of the first substrate 100 may be about 30 μm to about 120 μm.

The second substrate 200 may include organic or inorganic filler. The organic or inorganic filler may function as an anti-blocking agent.

The average particle diameter of the filler may be about 0.1 μm to about 5 μm. The average particle diameter of the filler may be about 0.1 μm to about 3 μm. The average particle diameter of the filler may be about 0.1 μm to about 1 μm.

The filler may be selected from at least one group consisting of silica particles, barium sulfate particles, alumina particles, or titania particles.

Additionally, the filler may be included in the second substrate 200 in an amount of about 0.01 wt% to about 3 wt% based on the entire second substrate 200. The filler may be included in the second substrate 200 in an amount of about 0.05 wt% to about 2 wt% based on the entire second substrate 200.

The second substrate 200 may have a single-layer structure. For example, the second substrate 200 may be a single-layer polyester film.

The second substrate 200 may have a multilayer structure. For example, the second substrate 200 may be a multilayer co-extruded film.

The first substrate 100 and the second substrate 200 may be flexible. Accordingly, the electrochromic device according to the embodiment may be flexible as a whole.

The first transparent electrode 300 is disposed on the first substrate 100. The first transparent electrode 300 may be formed by depositing on the first substrate 100. Additionally, a hard coating layer may be further included between the first transparent electrode 300 and the first substrate 100.

The first transparent electrode 300 is made of tin oxide, zinc oxide, silver (Ag), chromium (Cr), indium tin oxide (ITO), fluorine doped tin oxide (FTO), and aluminum. Aluminum doped Zinc Oxide (AZO), Gallium doped Zinc Oxide (GZO), Antimony doped Tin Oxide (ATO), Indium zinc oxide (IZO), It may include at least one from the group consisting of Niobium doped Titanium Oxide (NTO) or Cadmium Tin Oxide (CTO).

Additionally, the first transparent electrode 300 may include graphene, silver nanowire, and/or metal mesh.

The first transparent electrode 300 may have a total light transmittance of about 80% or more. The first transparent electrode 300 may have a total light transmittance of about 85% or more. The first transparent electrode 300 may have a total light transmittance of about 88% or more.

The first transparent electrode 300 may have a haze of about 10% or less. The first transparent electrode 300 may have a haze of about 7% or less. The first transparent electrode 300 may have a haze of about 5% or less.

The sheet resistance of the first transparent electrode 300 may be about 1Ω/sq to 60Ω/sq. The sheet resistance of the first transparent electrode 300 may be about 1Ω/sq to 40Ω/sq. The sheet resistance of the first transparent electrode 300 may be about 1Ω/sq to 30Ω/sq.

The thickness of the first transparent electrode 300 may be about 50 nm to about 50 μm. The thickness of the first transparent electrode 300 may be about 100 nm to about 10 μm. The thickness of the first transparent electrode 300 may be about 150 nm to about 5 μm.

The first transparent electrode 300 is electrically connected to the first color change layer 500. Additionally, the first transparent electrode 300 is electrically connected to the electrolyte layer 700 through the first discoloration layer 500.

The second transparent electrode 400 is disposed below the second substrate 200. The second transparent electrode 400 may be formed by depositing on the second substrate 200. Additionally, a hard coating layer may be further included between the second transparent electrode 400 and the second substrate 200.

The second transparent electrode 400 is made of tin oxide, zinc oxide, silver (Ag), chromium (Cr), indium tin oxide (ITO), fluorine doped tin oxide (FTO), and aluminum. Aluminum doped Zinc Oxide (AZO), Gallium doped Zinc Oxide (GZO), Antimony doped Tin Oxide (ATO), Indium zinc oxide (IZO), It may include at least one from the group consisting of Niobium doped Titanium Oxide (NTO) or Cadmium Tin Oxide (CTO).

Additionally, the second transparent electrode 400 may include graphene, silver nanowire, and/or metal mesh.

The second transparent electrode 400 may have a total light transmittance of about 80% or more. The second transparent electrode 400 may have a total light transmittance of about 85% or more. The second transparent electrode 400 may have a total light transmittance of about 88% or more.

The second transparent electrode 400 may have a haze of about 10% or less. The second transparent electrode 400 may have a haze of about 7% or less. The second transparent electrode 400 may have a haze of about 5% or less.

The sheet resistance of the second transparent electrode 400 may be about 1Ω/sq to 60Ω/sq. The sheet resistance of the second transparent electrode 400 may be about 1Ω/sq to 40Ω/sq. The sheet resistance of the second transparent electrode 400 may be about 1Ω/sq to 30Ω/sq.

The thickness of the second transparent electrode 400 may be about 50 nm to about 50 μm. The thickness of the second transparent electrode 400 may be about 100 nm to about 10 μm. The thickness of the second transparent electrode 400 may be about 150 nm to about 5 μm.

The second transparent electrode 400 is electrically connected to the second color change layer 600. Additionally, the second transparent electrode 400 is electrically connected to the electrolyte layer 700 through the second discoloration layer 600.

The electrochromic portion 20 is disposed between the first substrate 100 and the second substrate 200. The electrochromic portion 20 is disposed between the first transparent electrode 300 and the second transparent electrode 400. The electrochromic portion 20 is electrically connected to the first transparent electrode 300 and the second transparent electrode 400. The electrochromic portion 20 may be disposed on the first transparent electrode 300. Additionally, the electrochromic portion 20 may be disposed below the second transparent electrode 400. The electrochromic unit 20 is driven by electrical signals from the first transparent electrode 300 and the second transparent electrode 400. Additionally, the electrochromic unit 20 is driven by the first transparent electrode 300. ) and the light transmittance and/or color may be changed by the electrical signal from the second transparent electrode 400.

The first discoloration layer 500 is disposed on the first transparent electrode 300. The first discoloration layer 500 may be placed directly on the upper surface of the first transparent electrode 300. The first discoloration layer 500 may be directly electrically connected to the first transparent electrode 300.

The first discoloration layer 500 is electrically connected to the first transparent electrode 300. The first discoloration layer 500 may be directly connected to the first transparent electrode 300. Additionally, the first discoloration layer 500 is electrically connected to the electrolyte layer 700. The first discoloration layer 500 may be electrically connected to the electrolyte layer 700.

The first color changing layer 500 may change color by receiving electrons. The first color changing layer 500 may include a first electrochromic material that changes color when supplied with electrons. The first electrochromic material is tungsten oxide, niobium pentaoxide, vanadium pentaoxide, titanium oxide, molybdenum oxide, vilogen, or poly(3,4-ethylenedioxythiophene). ;PEDOT) may include at least one from the group.

The first color changing layer 500 may include the first electrochromic material in particle form. The tungsten oxide, niobium pentaoxide, vanadium pentaoxide, titanium oxide, and molybdenum oxide may be particles having a particle size of about 1 nm to about 200 nm.

The first color changing layer 500 may include the first electrochromic material in an amount of about 70 wt% to about 98 wt% based on the total weight of the first color changing layer 500. The first color changing layer 500 may include the first electrochromic material in an amount of about 80 wt% to about 96 wt% based on the total weight of the first color changing layer 500. The first color changing layer 500 may include the first electrochromic material in an amount of about 90 wt% to about 94 wt% based on the total weight of the first color changing layer 500.

Additionally, the first discoloration layer 500 may further include a binder. The binder may be an inorganic binder. The binder may include silica gel. The binder may be formed of silica sol containing tetramethoxysilane or methyltrimethoxysilane.

The first discoloring layer 500 may include the binder in an amount of about 1 wt% to 15 wt% based on the total weight of the first discoloring layer 500. The first discoloring layer 500 may include the binder in an amount of about 2 wt% to 10 wt% based on the total weight of the first discoloring layer 500. The first discoloring layer 500 may include the binder in an amount of about 3 wt% to 5 wt% based on the total weight of the first discoloring layer 500.

The second color change layer 600 is disposed below the second transparent electrode 400. The second discoloration layer 600 may be directly disposed on the lower surface of the second transparent electrode 400. The second discoloration layer 600 may be directly electrically connected to the second transparent electrode 400.

The second color changing layer 600 is electrically connected to the second transparent electrode 400. The second color change layer 600 may be directly connected to the second transparent electrode 400. Additionally, the second discoloration layer 600 is electrically connected to the electrolyte layer 700. The second discoloration layer 600 may be electrically connected to the electrolyte layer 700.

The second color changing layer 600 may change color as it loses electrons. The second color changing layer 600 may include a second electrochromic material that is oxidized and changes color while losing electrons. The second discoloration layer 600 may include at least one from the group consisting of Prussian blue, nickel oxide, and iridium oxide.

The second color changing layer 600 may include the second electrochromic material in particle form. The Prussian blue, nickel oxide, and iridium oxide may be particles having a particle size of about 1 nm to about 200 nm.

Additionally, the second discoloration layer 600 may further include the binder.

The second discoloration layer 600 may include the binder in an amount of about 1 wt% to 15 wt% based on the total weight of the second discoloration layer 600. The second discoloration layer 600 may include the binder in an amount of about 2 wt% to 10 wt% based on the total weight of the second discoloration layer 600. The second discoloration layer 600 may include the binder in an amount of about 3 wt% to 5 wt% based on the total weight of the second discoloration layer 600.

The electrolyte layer 700 is disposed on the first discoloration layer 500. Additionally, the electrolyte layer 700 is disposed below the second discoloration layer 600. The electrolyte layer 700 is disposed between the first discoloring layer 500 and the second discoloring layer 600.

The electrolyte layer 700 may include a solid polymer electrolyte containing metal ions or an inorganic hydrate. The electrolyte layer 700 may include lithium ions (Li+), sodium ions (Na+), potassium ions (K+), etc.

Specifically, Poly-AMPS, PEO/LiCF ₃ SO ₃ , etc. can be used as the solid polymer electrolyte, and Sb ₂ O ₅ .4H ₂ O, etc. can be used as the inorganic hydrate.

Additionally, the electrolyte layer 700 is configured to provide electrolyte ions involved in electrochromic reaction. The electrolyte ion may be, for example, a monovalent cation such as H+, Li+, Na+, K+, Rb+, or Cs+.

The electrolyte layer 700 may include an electrolyte. As examples of the electrolyte, liquid electrolyte, gel polymer electrolyte, or inorganic solid electrolyte can be used without limitation. Additionally, the electrolyte may be used in the form of a single layer or film so that it can be stacked together with the electrode or substrate.

The type of electrolyte salt used in the electrolyte layer 700 is not particularly limited as long as it can contain a compound capable of providing monovalent cations, that is, H+, Li+, Na+, K+, Rb+, or Cs+. For example, the electrolyte layer 700 is LiClO ₄ , LiBF ₄ , LiAsF ₆ , LiPF ₆ , LiCl, LiBr, LiI, LiB ₁₀ Cl ₁₀ , LiCF ₃ SO ₃ , LiCF ₃ CO ₂ , LiAsF ₆ , LiSbF ₆ , Lithium salt compounds such as LiAlCl ₄ , CH ₃ SO ₃ Li, CF ₃ SO ₃ Li or (CF ₃ SO ₂ ) ₂ NLi; Alternatively, it may include a sodium salt compound such as NaClO ₄ .

In one example, the electrolyte layer 700 may include a Cl or F element-containing compound as an electrolyte salt. Specifically, the electrolyte layer 700 is LiClO ₄ , LiBF ₄ , LiAsF ₆ , LiPF ₆ , LiCl, LiB ₁₀ Cl ₁₀ , LiCF ₃ SO ₃ , LiCF ₃ CO ₂ , LiAsF ₆ , LiSbF ₆ , LiAlCl ₄ , CF ₃ It may include one or more electrolyte salts selected from SO ₃ Li, (CF ₃ SO ₂ ) ₂ NLi, and NaClO ₄ .

The electrolyte may further include a carbonate compound as a solvent. Since carbonate-based compounds have a high dielectric constant, ionic conductivity can be increased. As a non-limiting example, a solvent such as propylene carbonate (PC), ethylene carbonate (EC), dimethyl carbonate (DMC), diethyl carbonate (DEC), or ethylmethyl carbonate (EMC) may be used as a carbonate-based compound.

In another example, when the electrolyte layer 700 includes a gel polymer electrolyte, the electrolyte layer 700 may include poly-vinyl sulfonic acid, poly-styrene sulfonic acid, ), Poly-ethylene sulfonic acid, Poly-2-acrylamido-2methyl-propane sulfonic acid, Poly-perfluoro sulfonic acid acid), poly-toluene sulfonic acid, poly-vinyl alcohol, poly-ethylene imine, poly-vinyl pyrrolidone, poly -Ethylene oxide (Poly-ethylene oxide (PEO)), poly-propylene oxide (PPO), poly-(ethylene oxide, siloxane) (PEOS), poly- (ethylene glycol, siloxane)(poly-(ethylene glycol, siloxane)), poly-(propylene oxide, siloxane)(poly-(propylene oxide, siloxane)), poly-(ethylene oxide, methyl methacrylate)(poly- (ethylene oxide, methyl methacrylate) (PEO-PMMA)), poly-(ethylene oxide, acrylic acid) (PEO PAA)), poly-(propylene glycol, methyl methacrylate)( It may include polymers such as poly-(propylene glycol, methyl methacrylate) (PPG PMMA)), poly-ethylene succinate, or poly-ethylene adipate. In one example, a mixture of two or more or a copolymer of two or more of the polymers listed above may be used as the polymer electrolyte.

Additionally, the electrolyte layer 700 may include a curable resin that can be hardened by ultraviolet ray irradiation or heat. The curable resin may be at least one selected from the group consisting of acrylate-based oligomers, polyethylene glycol-based oligomers, urethane-based oligomers, polyester-based oligomers, polyethylene glycol dimethyl, or polyethylene glycol diacrylate. Additionally, the electrolyte layer 700 may include a photocuring initiator and/or a thermal curing initiator.

The thickness of the electrolyte layer 700 may be about 10 ㎛ to about 200 ㎛. The thickness of the electrolyte layer 700 may be about 50 μm to about 150 μm.

The electrolyte layer 700 may have a transmittance in the range of 60% to 95%. Specifically, the electrolyte layer 700 may have a transmittance of 60% to 95% for visible light in the wavelength range of 380 nm to 780 nm, more specifically, 400 nm wavelength or 550 nm wavelength. The transmittance can be measured using a known haze meter (HM).

The light transmission control unit 800 is disposed on the first transparent electrode 300. The light transmission adjusting unit 800 is disposed between the first substrate 100 and the second substrate 200. The light transmission control unit 800 may be disposed between the first transparent electrode 300 and the second transparent electrode 400. The light transmission control unit 800 may be disposed on the first transparent electrode 300. The light transmission control unit 800 may be disposed on the upper surface of the first transparent electrode 300. The light transmission control unit 800 may be disposed between the first transparent electrode 300 and the electrochromic unit 20. The light transmission control unit 800 may be disposed between the first transparent electrode 300 and the first discoloration layer 500.

The light transmission control unit 800 includes a light transmission area 810 and a light blocking pattern 820. The light transmission area 810 is an area that can transmit incident light from the outside. The light transmission area 810 may be an area where the light blocking pattern 820 is not disposed. The light transmitting area 810 may be an area filled with the first discoloration layer 500 between the light blocking patterns 820 .

The light blocking pattern 820 surrounds the light transmission area 810. The light blocking pattern 820 is disposed on the first transparent electrode 300. The light blocking pattern 820 is disposed between the first substrate 100 and the second substrate 200. The light blocking pattern 820 may be disposed between the first transparent electrode 300 and the second transparent electrode 400. The light blocking pattern 820 may be disposed on the first transparent electrode 300. The light blocking pattern 820 may be disposed on the upper surface of the first transparent electrode 300. The light blocking pattern 820 may be disposed between the first transparent electrode 300 and the electrochromic portion 20. The light blocking pattern 820 may be disposed between the first transparent electrode 300 and the first discoloration layer 500.

The light blocking pattern 820 blocks incident light. Additionally, the light blocking pattern 820 absorbs incident light. The light blocking pattern 820 can absorb and block incident visible light and ultraviolet rays.

The light blocking pattern 820 may have an optical density of about 2 or more. The optical density of the light blocking pattern 820 may be about 3 to about 10. The optical density of the light blocking pattern 820 may be about 4 to about 10. The optical density can be measured by an optical density meter.

Additionally, the light blocking pattern 820 may have an L* color value of about 0 to about 30. The L* color value of the light blocking pattern 820 may be about 0 to about 20. The L* color value of the light blocking pattern 820 may be about 0 to about 15. The L* color value can be measured by a color coordinate meter.

The light blocking pattern 820 may include light absorbing particles. The light absorbing particles may include pigment. The light blocking pattern 820 may include ink. The light blocking pattern 820 may include black pigment. The pigment may be at least one selected from the group consisting of carbon black, copper chromate, acetylene black, chromium (II) oxide, or manganese oxide.

Additionally, the light-absorbing particles may further include electrochromic particles such as tungsten oxide. In the light absorbing particles, the pigment and the electrochromic particles may be included in a weight ratio of about 1:1 to about 1:3.

The light-absorbing particles may be included in the light-shielding pattern 820 in an amount of about 50 wt% to about 95 wt%, based on the total weight of the light-shielding pattern 820. The light-absorbing particles may be included in the light-shielding pattern 820 in an amount of about 60 wt% to about 90 wt%, based on the total weight of the light-shielding pattern 820. The light-absorbing particles may be included in the light-shielding pattern 820 in an amount of about 65 wt% to about 85 wt%, based on the total weight of the light-shielding pattern 820. The light-absorbing particles may be included in the light-shielding pattern 820 in an amount of about 70 wt% to about 85 wt%, based on the total weight of the light-shielding pattern 820.

Since the light absorbing particles are included in the light blocking pattern 820 in the above amount, the light blocking pattern 820 can effectively block light.

The light blocking pattern 820 may further include an organic binder. The organic binder includes a curable resin. The light blocking pattern 820 may further include a photo-curable resin and/or a thermo-curable resin.

The organic binder may be included in the light blocking pattern 820 in an amount of about 5 wt% to about 50 wt% based on the total weight of the light blocking pattern 820. The organic binder may be included in the light blocking pattern 820 in an amount of about 10 wt% to about 40 wt% based on the total weight of the light blocking pattern 820. The organic binder may be included in the light blocking pattern 820 in an amount of about 15 wt% to about 35 wt% based on the total weight of the light blocking pattern 820. The organic binder may be included in the light blocking pattern 820 in an amount of about 15 wt% to about 30 wt% based on the total weight of the light blocking pattern 820.

Since the organic binder is included in the light blocking pattern 820 in the above amount, the strength of the light blocking pattern 820 can be appropriately maintained. Additionally, because the organic binder is included in the light blocking pattern 820 in the same amount as above, the light absorbing particles can be prevented from scattering.

The organic binder may include a thermosetting resin. The organic binder may include an epoxy-based thermosetting resin, a urethane-based thermosetting resin, or a polyester-based thermosetting resin.

The width of the light blocking pattern 820 may be about 1 μm to about 100 μm. The width of the light blocking pattern 820 may be about 5 μm to about 80 μm. The width of the light blocking pattern 820 may be about 5㎛ to about 90㎛. The width of the light blocking pattern 820 may be about 10 μm to about 60 μm. The width of the light blocking pattern 820 may be about 5 μm to about 15 μm.

The height of the light blocking pattern 820 may be about 0.1 μm to about 10 μm. The height of the light blocking pattern 820 may be about 0.5 μm to about 7 μm. The height of the light blocking pattern 820 may be about 1㎛ to about 5㎛.

The pitch of the light blocking pattern 820 may be about 0.5 mm to about 10 mm. The pitch of the light blocking pattern 820 may be about 1 mm to about 20 mm. The pitch of the light blocking pattern 820 may be about 200 μm to about 15 mm. The pitch of the light blocking pattern 820 may be about 1 mm to about 13 μm.

Since the width, height, and pitch of the light blocking pattern 820 are within the above ranges, the electrochromic device according to the embodiment can prevent distortion of the external scenery.

The electrochromic device according to the embodiment may further include a sealing portion (not shown). The sealing portion includes at least one of the first transparent electrode 300, the second transparent electrode 400, the first discoloration layer 500, the second discoloration layer 600, and the electrolyte layer 700. Can be placed on the side.

The sealing portion includes a curable resin. The sealing part may include a thermosetting resin and/or a photo-curing resin.

Examples of the thermosetting resin include epoxy resin, melamine resin, urea resin, or unsaturated polyester resin. In addition, examples of the epoxy resin include phenol novolak-type epoxy resin, cresol novolak-type epoxy resin, biphenyl novolak-type epoxy resin, trisphenol novolak-type epoxy resin, dicyclopentadiene novolak-type epoxy resin, and bisphenol A type. Epoxy resin, bisphenol F type epoxy resin, 2, 2'-diaryrbisphenol A type epoxy resin, bisphenol S type epoxy resin, hydrogenated bisphenol A type epoxy resin, propylene oxide added bisphenol A type epoxy resin, biphenyl form Examples include epoxy resins, naphthalene type epoxy resins, resorcinol type epoxy resins, and glycidyl amines.

Additionally, the sealing part may further include a heat curing agent. Hydrazide compounds such as 1, 3-bis [hydrazinocarbonoethyl 5-isopropyl hydantoin] and adipic acid dihydrazide; dicyandiamide, guanidine derivatives, 1-cyanide Noethyl-2-phenylimidazole, N-[2-(2-methyl-1-imidazolyl) ethyl]urea, 2, 4-diamino-6-[2'-methylimidazolyl (1') ]-Ethyl-s-Thorazine, N, N'-Bis(2-methyl-1-imidazolyl ethyl) urea, N, N'-(2-methyl-1-imidazolyl ethyl)-aziformami , 2-phenyl-4-methyl-5-hydroxymethyl imidazole, 2-imidazoline-2-thiol, 2, 2'-thiogethanethiol, addition products of various amines with epoxy resins, etc. You can.

The first sealing part may include a photo-curable resin. Examples of the photo-curable resin include acrylate-based resins such as urethane acrylate. Additionally, the sealing part may further include a photo curing initiator. The photo curing initiator may be at least one selected from the group consisting of an acetophenone-based compound, a benzophenone-based compound, a thioxanthone-based compound, a benzoin-based compound, a triazine-based compound, or an oxime-based compound.

Additionally, the sealing portion may further include a moisture absorbent such as zeolite and/or silica. Additionally, the sealing portion may further include an inorganic filler. The inorganic filler may be a material with high insulating properties, transparency, and durability. Examples of the inorganic filler include silicon, aluminum, zirconia, or mixtures thereof.

Additionally, the electrochromic device according to the embodiment may further include a first bus bar (not shown) and a second bus bar (not shown).

The first bus bar may be disposed on the first transparent electrode 300. The first bus bar may be connected to the first transparent electrode 300.

The first bus bar may be electrically connected to the first transparent electrode 300. The first bus bar may be in direct contact with the upper surface of the first transparent electrode 300. The first bus bar may be connected to the first transparent electrode 300 through solder.

The second bus bar is disposed below the second transparent electrode 400. The second bus bar is connected to the second transparent electrode 400.

The second bus bar may be electrically connected to the second transparent electrode 400. The second bus bar may be in direct contact with the lower surface of the second transparent electrode 400. The second bus bar may be connected to the second transparent electrode 400 through solder.

The first bus bar and/or the second bus bar may include metal. The first bus bar and/or the second bus bar may include a metal ribbon. The first bus bar and/or the second bus bar may include conductive paste. The first bus bar and/or the second bus bar may include a binder and a conductive filler.

The electrochromic device according to the embodiment can be manufactured by the following method. Figures 3 to 7 are cross-sectional views showing the process of manufacturing an electrochromic device according to an embodiment.

Referring to FIG. 3, a first transparent electrode 300 is formed on the first substrate 100. The first transparent electrode 300 may be formed through a vacuum deposition process. A metal oxide such as indium tin oxide may be deposited on the first substrate 100 through a sputtering process or the like to form the first transparent electrode 300.

The first transparent electrode 300 may be formed through a coating process. A nano metal wire may be coated with a binder on the first substrate 100 to form the first transparent electrode 300. A conductive polymer may be coated on the first substrate 100 to form the first transparent electrode 300.

Additionally, the first transparent electrode 300 may be formed through a patterning process. A metal layer may be formed on the first substrate 100 through a sputtering process, etc., and the metal layer may be patterned to form a first transparent electrode 300 including a metal mesh on the first substrate 100. .

Afterwards, a light transmission control unit 800 is formed on the first transparent electrode 300. A light blocking pattern 820 is formed on the upper surface of the first transparent electrode 300.

In order to form the light blocking pattern 820, an ink composition containing light absorbing particles is prepared. The ink composition includes the light absorbing particles, an organic binder, and a solvent. The organic binder may include a curable resin. The curable resin may include a thermosetting resin and a thermal curing initiator. The curable resin may include a photo-curable resin and a photo-cure initiator.

The thermosetting resin may be selected from at least one group consisting of epoxy resin, urethane resin, or polyester resin.

The thermal curing initiator may include a cationic thermal curing initiator. The thermal curing initiator may include an N-benzyl-quinoxalinium salt-based initiator.

The photo-curable resin may include an acrylate-based resin.

The photo curing initiator may be at least one selected from the group consisting of an acetophenone-based compound, a benzophenone-based compound, a thioxanthone-based compound, a benzoin-based compound, a triazine-based compound, or an oxime-based compound.

The solid content contained in the ink composition may be about 10 wt% to about 90 wt%. The solid content contained in the ink composition may be about 40 wt% to about 80 wt%. The solid content contained in the ink composition may be about 50 wt% to about 80 wt%. The solid content contained in the ink composition may be about 60 wt% to about 80 wt%.

Thereafter, the solvent is removed, and the solvent can be dried through a drying process. The solvent may be dried at a temperature of about 50°C to about 100°C for about 30 minutes to about 2 hours. Afterwards, the binder is cured. The binder may be cured by a thermal curing process and/or a light curing process. The thermal curing process may be carried out at a temperature of about 150°C to about 200°C for about 30 minutes to about 2 hours.

Accordingly, the light transmission control unit 800 is formed on the first transparent electrode 300.

Referring to FIG. 4, a first discoloration layer 500 is formed on the light transmission control unit 800. The first discoloration layer 500 may be formed through a sol-gel coating process. A first sol solution containing a first electrochromic material, a binder, and a solvent may be coated on the first transparent electrode 300. A sol-gel reaction may occur in the coated first sol solution, and the first discoloration layer 500 may be formed.

The first sol solution may include the first discoloring material in particle form in an amount of about 5 wt% to about 30 wt%. The first sol solution may include the binder in an amount of about 5 wt% to about 30 wt%. The first sol solution may include the solvent in an amount of about 60 wt% to about 90 wt%.

The first sol solution may further include a dispersant.

The solvent may be at least one selected from the group consisting of alcohols, ethers, ketones, esters, or aromatic hydrocarbons. The solvent is ethanol, propanol, butanol, hexanol, cyclohexanol, diacetone alcohol, ethylene glycol, diethylene glycol, glycerin, diethyl ether, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol modobutyl ether. , Diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, propylene glycol monomethyl ether, acetone, methyl ethyl ketone, acetylacetone, methyl isobutyl ketone, cyclohexanone, acetoacetate ester, methyl acetate, ethyl acetate, At least one or more may be selected from the group consisting of n-propyl acetate and i-butyl acetate.

As described above, the binder may be an inorganic binder.

Referring to FIG. 5, a second transparent electrode 400 is formed on the second substrate 200.

The second transparent electrode 400 may be formed through a vacuum deposition process. A metal oxide such as indium tin oxide may be deposited on the second substrate 200 through a sputtering process or the like to form the second transparent electrode 400.

The second transparent electrode 400 may be formed through a coating process. A nano metal wire may be coated with a binder on the second substrate 200 to form the second transparent electrode 400. A conductive polymer may be coated on the second substrate 200 to form the second transparent electrode 400.

Additionally, the second transparent electrode 400 may be formed through a patterning process. A metal layer may be formed on the second substrate 200 through a sputtering process, etc., and the metal layer may be patterned to form a second transparent electrode 400 including a metal mesh on the second substrate 200. .

Afterwards, a second discoloration layer 600 is formed on the second transparent electrode 400. The second discoloration layer 600 may be formed through a sol-gel coating process. A second sol solution containing a second electrochromic material, a binder, and a solvent may be coated on the second transparent electrode 400. A sol-gel reaction may occur in the coated second sol solution, and the second discoloration layer 600 may be formed.

The second sol solution may include the second discoloring material in particle form in an amount of about 5 wt% to about 30 wt%. The second sol solution may include the binder in an amount of about 5 wt% to about 30 wt%. The second sol solution may include the solvent in an amount of about 60 wt% to about 90 wt%.

The second sol solution may further include a dispersant.

Referring to FIG. 6, an electrolyte composition for forming an electrolyte layer 700 is formed on the first discoloration layer 500.

The electrolyte composition may include a metal salt, an electrolyte, a photo-curing resin, and a photo-curing initiator. The photo-curable resin includes hexandiol diacrylate (HDDA), tripropylene glycol diacrylate (TPGDA), ethylene glycol diacrylate (EGDA), and trimethylolpropane triacrylate. TMPTA), trimethylolpropane ethoxylated triacrylate (TMPEOTA), glycerol propoxylated triacrylate (GPTA), pentaerythritol tetraacrylate (PETA), or Dipenta At least one may be selected from the group consisting of dipentaerythritol hexaacrylate (DPHA).

The metal salt, the electrolyte, and the photo curing initiator may be as described above.

Referring to FIG. 7, the second substrate 200, the second transparent electrode 400, and the second color change layer 600 are stacked on the coated electrolyte composition. At this time, the second discoloration layer 600 is in direct contact with the coated electrolyte composition.

Thereafter, the coated electrolyte composition is cured by light, and a first laminate including the first substrate 100, the first transparent electrode 300, and the first discoloration layer 500 and the second A second laminate including the substrate 200, the second transparent electrode 400, and the second color change layer 600 are laminated to each other. That is, the first laminate and the second laminate may be adhered to each other by the electrolyte layer 700.

Figure 8 is a cross-sectional view showing an electrochromic device according to another embodiment.

Referring to FIG. 8 , the light transmission control unit 802 may be disposed between the second transparent electrode 400 and the second color change layer 600. The light transmission control unit 802 is disposed on the lower surface of the second transparent electrode 400. The light transmission control unit 802 may be placed directly on the lower surface of the second transparent electrode 400.

Figure 9 is a cross-sectional view showing an electrochromic device according to another embodiment.

Referring to FIG. 9, the light transmission control unit includes a first light transmission control unit 801 and a second light transmission control unit 802. The first light transmission control unit 801 is disposed between the first transparent electrode 300 and the first color change layer 500. Additionally, the second light transmission control unit 802 is disposed between the second transparent electrode 400 and the second color change layer 600.

Additionally, the first light transmission control unit 801 may include a first light transmission area 811 and a first light blocking pattern 821. The second light transmission control unit 802 may include a second light transmission area 812 and a second light blocking pattern 822.

The first light-transmitting area 811 may correspond to the second light-transmitting area 812, and the first blocking pattern 821 and the second blocking pattern 822 may be aligned with each other.

Accordingly, the electrochromic device according to the embodiment can efficiently protect the electrochromic portion from light incident from the first substrate 100 and the second substrate 200. Additionally, the electrochromic device according to the embodiment can prevent distortion of the external scenery.

The electrochromic device according to the embodiment may have light transmittance. Here, the light transmittance may refer to the light transmittance based on a state in which the electrochromic device is not electrochromic. Additionally, the light transmittance may mean total light transmittance.

The light transmittance in the colored state of the electrochromic device may be about 5% to about 30%. The light transmittance in the colored state of the electrochromic device may be about 7% to about 20%. The light transmittance in the colored state of the electrochromic device may be about 8% to about 15%.

The light transmittance of the electrochromic device in a decolorized state may be about 50% to about 80%. The light transmittance of the electrochromic device in a decolorized state may be about 40% to about 70%. The light transmittance of the electrochromic device in a decolorized state may be about 50% to about 70%.

The electrochromic device according to the embodiment may have a light reflectance of about 3% to about 8% in a decolorized state. The electrochromic device according to the embodiment may have a light reflectance of about 3.5% to about 7.5% in a decolorized state. The electrochromic device according to the embodiment may have a light reflectance of about 3% to about 8% with respect to light incident through the first substrate 100 in a decolorized state. The electrochromic device according to the embodiment may have a light reflectance of about 3% to about 8% with respect to light incident through the second substrate 200 in a decolorized state.

The electrochromic device according to the embodiment may have a light reflectance of about 3.5% to about 8% in a colored state. The electrochromic device according to the embodiment may have a light reflectance of about 4% to about 7.5% in a colored state. In a colored state, the electrochromic device according to the embodiment may have a light reflectance of about 3.5% to about 8% with respect to light incident through the first substrate 100. The electrochromic device according to the embodiment may have a light reflectance of about 3% to about 8% with respect to light incident through the second substrate 200 in a colored state.

The light reflectance can be measured by a spectrophotometer (Konica-Minolta, model name: CM-5).

The light reflectance can be measured according to ASTM E903-96.

The electrochromic device according to the embodiment may have a gloss of about 90 GU to about 140 GU in a decolorized state. The electrochromic device according to the embodiment may have a gloss of about 80 GU to about 140 GU in a decolorized state. The electrochromic device according to the embodiment may have a gloss of about 100 GU to about 140 GU in a decolorized state. The electrochromic device according to the embodiment may have a gloss of about 80 GU to about 120 GU in a decolorized state.

The electrochromic device according to the embodiment may have a gloss of about 90 GU to about 140 GU with respect to light incident through the first substrate 100 in a decolorized state. The electrochromic device according to the embodiment may have a gloss of about 90 GU to about 140 GU with respect to light incident on the second substrate 200 in a decolorized state.

The electrochromic device according to the embodiment may have a glossiness of about 70 GU to about 140 GU in a colored state. The electrochromic device according to the embodiment may have a gloss of about 70 GU to about 130 GU in a colored state. The electrochromic device according to the embodiment may have a gloss of about 80 GU to about 140 GU in a colored state. The electrochromic device according to the embodiment may have a gloss of about 80 GU to about 120 GU in a colored state.

In a colored state, the electrochromic device according to the embodiment may have a glossiness of about 70 GU to about 140 GU with respect to light incident through the first substrate 100. In a colored state, the electrochromic device according to the embodiment may have a gloss of about 70 GU to about 140 GU with respect to light incident through the second substrate 200.

The gloss can be measured by ASTM D523, ASTM D2457 or ISO 2813.

The electrochromic device according to the embodiment includes a light transmission control unit 800. The light transmission control unit 800 includes a light transmission area 810 and a light blocking pattern 820. Accordingly, the electrochromic device according to the embodiment can transmit light with an appropriate transmittance through the light transmission area 810. Additionally, the electrochromic device according to the embodiment can appropriately adjust reflectance and glossiness through the light blocking pattern 820.

Accordingly, the electrochromic device according to the embodiment can lower the reflectance of incident light through the light transmission control unit 800. Additionally, the electrochromic device according to the embodiment may have appropriate glossiness. Accordingly, the electrochromic device according to the embodiment can reduce glare.

In particular, because the light blocking pattern 820 has an appropriate width, an appropriate height, and an appropriate pitch, the electrochromic device according to the embodiment can minimize distortion of the external scenery while having appropriate reflectance and appropriate glossiness. .

Additionally, the light blocking pattern 820 can appropriately reduce external light incident on the electrochromic unit 20. Accordingly, the light blocking pattern 820 can efficiently protect the electrochromic unit 20 from external light. Accordingly, the electrochromic device according to the embodiment may have improved durability.

FIG. 10 is a diagram illustrating a window device 1 according to an embodiment.

Referring to FIG. 10, the window device 1 according to the embodiment includes the electrochromic element 10, a frame 20, windows 31, 32, and 33, a plug-in component 40, and a power source 50. Includes.

The frame 20 may be composed of one or more pieces. For example, the frame 20 may be composed of one or more materials such as vinyl, PVC, aluminum (Al), steel, or fiberglass. The frame 20 fixes the windows 31, 32, and 33 and seals the space between the windows 31, 32, and 33. also,

The frame 20 may hold or include pieces of foam or other material. The frame 20 includes a spacer, and the spacer can be placed between adjacent windows 31, 32, and 33. Additionally, the spacer, together with the adhesive sealant, can airtightly seal the space between the windows 31, 32, and 33.

The windows 31, 32, 33 are fixed to the frame 20. The windows 31, 32, and 33 may be glass panes. The windows 31, 32, 33 are made of conventional silicon oxide (SOx) glass, such as soda lime glass or float glass, consisting of approximately 75% silica (SiO2) plus Na2O, CaO, and some minor additives. It may be a glass substrate of the system. However, any material with suitable optical, electrical, thermal, and mechanical properties may be used. The windows 31, 32, 33 can also be made of, for example, other glass materials, plastics and thermoplastics (e.g. poly(methyl methacrylate), polystyrene, polycarbonate, allyl diglycol carbonate, SAN (styrene acrylonitrile copolymer), poly(4-methyl-1-pentene), polyester, polyamide), or mirror materials. The windows 31, 32, and 33 may include tempered glass.

The windows 31, 32, and 33 may include a first window 31, a second window 32, and a third window 33. The first window 31 and the third window 33 may be disposed on the outermost side, and the second window 32 may be disposed between the first window 31 and the third window 33. there is.

The electrochromic element 10 is disposed between the first window 31 and the second window 32. The electrochromic element 10 may be laminated to the first window 31 and the second window 32.

The electrochromic element 10 may be laminated to the first window 31 using a first polyvinyl butyral sheet. That is, the first polyvinyl butyral sheet may be disposed on the first window 31 and the electrochromic element 10 and laminated on the first window 31 and the electrochromic element 10. .

The electrochromic element 10 may be laminated to the second window 32 by a second polyvinyl butyral sheet. That is, the second polyvinyl butyral sheet may be disposed on the second window 32 and the electrochromic element 10 and laminated on the second window 32 and the electrochromic element 10. .

A space 60 may be formed between the second window 32 and the third window 33. The space may be filled with one or more gases such as argon (Ar), krypton (Kr), or xenon (Xn).

The windows 31, 32, 33 may be any glass pane size for residential or commercial window applications. The size of glass panes can vary widely depending on the specific needs of a home or commercial business. In some embodiments, the windows 31, 32, and 33 may be formed of architectural glass. Architectural glass is commonly used in commercial buildings, but may also be used in residential buildings and typically, although not necessarily, separates the indoor environment from the outdoor environment. In some embodiments, a suitable architectural glass substrate may be at least approximately 20 inches by approximately 20 inches, and may be much larger, for example, approximately 80 inches by approximately 120 inches, or larger. Architectural glass is typically at least about 2 millimeters (mm) thick and can be as thick as 6 mm or more.

In one embodiment, the windows 31, 32, and 33 may have a thickness ranging from approximately 1 mm to approximately 10 mm.

In one embodiment, the windows 31, 32, 33 may be very thin and flexible, such as Gorilla Glass® or WillowTM Glass, each of which is commercially available from Corning, Inc. of Corning, New York. These glasses may be less than 0.3 mm thick or less than about 1 mm thick.

The plug-in component (40) may include a first electrical input (41), a second electrical input (42), a third electrical input (43), a fourth electrical input (44) and a fifth electrical input (45). You can.

Additionally, the power supply unit 50 includes a first power terminal 51 and a second power terminal 52.

The first electrical input 41 is electrically coupled to the first power terminal 51 through one or more wires or other electrical connections, components, or devices.

The first electrical input 41 may include a pin, socket, or other electrical connector or conductor. Additionally, the first electrical input 41 may be electrically connected to the electrochromic element 10 through a first bus bar (not shown). The first bus bar may be electrically connected to the second transparent electrode 400.

The second electrical input 42 is electrically coupled to the second power terminal 52 through one or more wires or other electrical connections, components, or devices.

The second electrical input 42 may include a pin, socket, or other electrical connector or conductor. Additionally, the second electrical input 42 may be electrically connected to the electrochromic element 10 through a second bus bar (not shown). The second bus bar may be electrically connected to the first transparent electrode 300.

The third electrical input 43 may be coupled to device, system, or building ground.

The fourth electrical input 44 and the fifth electrical input 45 can be used individually, for example, for communication between a controller or microcontroller controlling the window device 1 and a network controller.

The power supply unit 50 supplies power to the electrochromic element 10 through the plug-in component 40. In addition, the power supply unit 50 can be controlled by the external controller to supply power of a certain waveform to the electrochromic element 10.

Additionally, the features, structures, effects, etc. described in the embodiments above are included in at least one embodiment of the present invention and are not necessarily limited to only one embodiment. Furthermore, the features, structures, effects, etc. illustrated in each embodiment can be combined or modified and implemented in other embodiments by a person with ordinary knowledge in the field to which the embodiments belong. Therefore, contents related to such combinations and modifications should be construed as being included in the scope of the present invention.

Although the above description focuses on the examples, this is only an example and does not limit the present invention, and those skilled in the art will be able to You will see that various variations and applications are possible. For example, each component specifically shown in the examples can be modified and implemented. And these variations and differences in application should be construed as being included in the scope of the present invention as defined in the appended claims.

Manufacturing example

ITO film: Hansung Industrial Co., Ltd., HI150-ABE-125A-AB

Tungsten oxide powder: Adcro Co., Ltd., ELACO-W

Nickel oxide powder: Adcro Co., Ltd., ELACO-P

Carbon Black: Mitsubishi Chemical, MA-100

Thermosetting epoxy resin: Kukdo Chemical, YDF-170

ink composition

About 15 parts by weight of tungsten oxide powder, about 5 parts by weight of carbon black, about 5 parts by weight of thermosetting epoxy resin, and about 75 parts by weight of toluene were uniformly mixed.

Gel polymer electrolyte composition

About 39 parts by weight of dipentaerythritol hexaacrylate (DPHA), about 80 parts by weight of the ionic liquid 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide [BMI-TFSI], and about A gel polymer electrolyte composition was prepared by mixing 1 part by weight of diethoxyacetophenone (DEAP) and adding LiBF4 (Li+ concentration: 1 mol/L).

Example 1

The ink composition is screen printed on an ITO film to form a square light transmission area with a width of about 60 μm and a pitch of about 10 mm, and the printed ink composition is printed at a temperature of about 70° C. for about 30 minutes. It is dried and cured at a temperature of about 150° C. for about 30 minutes to form a light-shielding pattern. About 10 parts by weight of tungsten oxide powder, about 1 part by weight of tetraethyl orthsilicate (TEOS), and about 90 parts by weight of ethanol were uniformly mixed to prepare a first color changing material composition. The first color changing material composition is coated on the light blocking pattern to a thickness of about 35㎛, and a first color changing layer having a thickness of about 900nm is produced by a sol-gel reaction at a temperature of about 100°C for about 5 minutes. It has been done. About 11 parts by weight of nickel oxide powder, about 1 part by weight of TEOS, and about 89 parts by weight of ethanol were uniformly mixed to prepare a second color change material composition. The second discoloring material composition is coated on a second ITO film to a thickness of about 60㎛, and a second discoloring layer having a thickness of about 1800nm is formed by a sol-gel reaction at a temperature of about 120°C for about 5 minutes. manufactured. The gel polymer electrolyte composition is coated on the first discoloration layer to a thickness of about 100㎛, and a second ITO film on which the second discoloration layer is formed is laminated on the coated gel polymer electrolyte composition, and is irradiated by UV light. The coated gel polymer electrolyte composition was cured. Thereafter, the laminate was left at room temperature for about 14 hours to age. Accordingly, the electrochromic device according to the example was manufactured.

Examples 2 to 4 and Comparative Examples

As shown in Table 1 below, a light blocking pattern was formed.

division Light blocking pattern width (㎛) Shading pattern pitch (mm) Example 1 60 10 Example 2 60 5 Example 3 30 10 Example 4 30 5 Comparative example doesn't exist doesn't exist

Evaluation example

1. Reflectance

D65 standard light was irradiated through the first ITO film, and the reflectance was measured by a spectrophotometer (Konica-Minolta, model name: CM-5).

2. Total light transmittance

In the electrochromic devices manufactured in the examples and manufacturing examples, the total light transmittance was measured by a transmittance meter (EDTM, SS2450).

3. Haze

In the electrochromic devices manufactured in the examples and production examples, haze was measured by a spectrophotometer (Konica Minolta, model name: CM-5).

4. Glossiness

D65 standard light was irradiated through the first ITO film, and the gloss was measured using a gloss measurement device (spectro guide sphere gloss, BYK Gardner).

division reflectivity
(%, coloring/discoloration) Transmittance
(%, coloring/discoloration) Haze
(%, coloring/discoloration) Glossiness
(GU, coloring/discoloration) Example 1 4.69/7.22 10/60 1.30/1.23 95.9/124.5 Example 2 3.99/6.19 10/60 1.45/1.38 82.3/107.7 Example 3 5.02/7.70 10/60 1.21/1.15 104.1/136.6 Example 4 4.63/7.93 10/60 1.26/1.18 99.6/140.8 Comparative example 5.36/8.23 10/60 1.16/1.10 109.4/142.4

As shown in Table 2, the electrochromic device according to the example had a low reflectance and appropriate gloss.

Electrochromic element (10)
First substrate (100)
Second substrate (200)
First transparent electrode (300)
Second transparent electrode (400)
Electrochromic part (20)
Light transmission control unit (800)
First discoloration layer (500)
Second color change layer (600)
Electrolyte layer (700)

Claims (13)

first substrate;
a second substrate facing the first substrate and disposed on the first substrate;
a first transparent electrode layer disposed between the first substrate and the second substrate;
a second transparent electrode layer disposed between the first substrate and the second substrate and facing the first transparent electrode layer;
an electrochromic portion disposed between the first transparent electrode layer and the second transparent electrode layer; and
An electrochromic device comprising a light transmission control unit disposed between the first substrate and the second substrate and including a light transmission area and a light blocking pattern disposed around the light transmission area. The electrochromic device of claim 1, wherein the electrochromic portion includes: a first color-changing layer disposed on the first transparent electrode layer; An electrochromic device comprising an electrolyte layer disposed on the first color change layer and a second color change layer disposed on the electrolyte layer. The electrochromic device of claim 1, wherein the light blocking pattern has an optical density of 3.0 to 10. The electrochromic device of claim 1, wherein the light blocking pattern has an L* of 0 to 30. The electrochromic device of claim 1, wherein the light-shielding pattern has a width of 1 μm to 100 μm, and a pitch of the light-shielding pattern is about 0.5 mm to 10 mm. The electrochromic device of claim 1, wherein the light transmission control unit is disposed between the first transparent electrode layer and the electrochromic unit. The method of claim 1, wherein the light transmission control unit
a first light transmission control unit disposed between the first transparent electrode layer and the electrochromic unit; and
An electrochromic device comprising a second light transmission control unit disposed between the second transparent electrode layer and the electrochromic unit. The electrochromic device of claim 1, wherein the light blocking pattern includes dye, pigment, or a mixture thereof. The electrochromic device of claim 8, wherein the light blocking pattern includes carbon black. The electrochromic device according to claim 1, wherein the reflectance in a decolorized state is 3% to 8%. The electrochromic device according to claim 1, wherein the electrochromic device has a glossiness of 100 GU to 140 GU in a decolorized state. first substrate;
a second substrate facing the first substrate and disposed on the first substrate;
a first transparent electrode layer disposed between the first substrate and the second substrate;
a second transparent electrode layer disposed between the first substrate and the second substrate and facing the first transparent electrode layer; and
Comprising an electrochromic portion disposed between the first transparent electrode layer and the second transparent electrode layer,
The reflectance in the decolorized state measured through the first substrate is 3% to 8%,
An electrochromic device having a decolorized glossiness measured through the first substrate of 100 GU to 140 GU. frame;
a window mounted on the frame; and
Comprising an electrochromic element disposed in the window,
The electrochromic element is
first substrate;
a second substrate facing the first substrate and disposed on the first substrate;
a first transparent electrode layer disposed between the first substrate and the second substrate;
a second transparent electrode layer disposed between the first substrate and the second substrate and facing the first transparent electrode layer;
an electrochromic portion disposed between the first transparent electrode layer and the second transparent electrode layer; and
A window device comprising a light transmission adjusting unit disposed between the first substrate and the second substrate and including a light transmission area and a light blocking pattern disposed around the light transmission area.