KR100383085B1 - Electrochromic device - Google Patents

Abstract

PURPOSE: An electrochromic device is provided to uniformly bring out the color of the entire cell within a short period of time. CONSTITUTION: Two glass plates(1) on which ITO films(2) are respectively coated are prepared. Portions of the ITO films corresponding to boundary lines of a plurality of subcells are removed. Spacers(6) are attached to the boundary lines of one of the glass plates. A thermal hardening agent(4) is coated on the edge of the glass plate other than a solution injection hole. The glass plate to which the spacers are attached and the glass plate on which the thermal hardening agent is coated are placed facing each other, and hardened using a hot presser. An electrochromic composition(5) is injected into the cell formed between the two glass plates. The solution injection hole is sealed using a silicon sealant. Electrodes(3) are respectively formed at the edges of the two glass plates.

Description

Electrochromic device

[Industrial use]

The present invention relates to an electrochromic device, and more particularly, to an electrochromic device capable of adjusting the intensity of light transmitted or reflected according to an applied voltage.

[Prior art]

The electrochromic device refers to a device used for an automotive mirror, a window for adjusting transmittance, a display device, and the like by using an electrochromic composition that changes color when an electric current flows.

Such electrochromic electrochromic composition used in the device is using Hagen (viologen) the compounds get electrons to Biology of a cation of the negative electrode reducing component color _{^{change, BF 4 -, PF 6 -}} , AsF 6 -, ClO 4 ^-, NO ₃ ^-, such as the cathode and using an anion of a reducing component, KBr, KCl, NiCl ₂ and phenazine (phenazine) and at least one compound selected from the group consisting of derivatives in the electrolyte, or the anodic oxidation component water or propylene carbonate ( It is prepared by dissolving in organic solvents such as propylene carbonate, butyrolactone, and ethylene carbonate.

The conventional method for producing an electrochromic device using the above composition is as follows.

Two sheets of glass (1) on which the ITO conductive film (2) is deposited are laminated so that the surface of the ITO faces inward, and then a cell is manufactured, and the electrochromic composition (5) described above is injected to form a first one. The electrochromic device was manufactured with the cell of.

However, when the electrochromic device is made of a single cell as described above, when the size of the cell is enlarged, the color of the electrode near the electrode appears dark, but the color of the inside of the cell does not appear weak or color. In addition, there is a problem in that the color of the entire cell is not uniformly developed and color difference is generated for each part, and a color development time difference is generated for each part and the time required for color development is long.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide an electrochromic device in which the color of the entire cell can be uniformly colored at the same time.

1 is a schematic cross-sectional view of a conventional electrochromic device.

2 is a schematic cross-sectional view of the electrochromic device of the present invention.

Figure 3 is a schematic cross-sectional view of the conductive layer forming the electrochromic device of the present invention.

Figure 4 is an explanatory diagram schematically showing the flow of current when passing the current through the electrochromic device of the present invention.

Explanation of symbols on the main parts of the drawings

1: glass substrate

2: ITO membrane

3: electrode

4: hardener

5: electrochromic composition

6: spacer

In order to achieve the above object, the present invention provides an electrochromic device comprising two transparent substrates coated with a conductive film such that the conductive film is disposed to face each other to form a cell, and to provide an electrochromic composition in the cell. The method may further include forming a boundary by removing a portion of the conductive film corresponding to a portion of a plurality of small cells, wherein an insulating spacer, which is supported by the transparent substrate and installed in the cell, is inserted and disposed. An electrochromic device is provided.

In the present invention described above, the spacer is preferably selected from the group consisting of a seal, an optical fiber, and an adhesive, and in particular, it is preferable because the optical fiber is transparent and it is not noticeable to distinguish the cell by the optical fiber when discoloring.

In the apparatus of the present invention, the transparent substrate is glass, and the sealed space is formed by sealing both ends of the transparent substrate with silicone sealant, and the conductive film is preferably an ITO film.

In addition, in the present invention, the conductive film of the portion where the spacer is connected to remove the short circuit, one side of the conductive portion of the both of the conductive film is in contact with each other so that the spacer adjacent to the adjacent portion of the conductive film is connected. It is preferable to remove only the film in accordance with the flow of current.

EXAMPLE

Hereinafter, preferred examples and comparative examples of the present invention are described. However, the following examples are only one preferred embodiment of the present invention and the present invention is not limited to the following examples.

(Example 1)

FIG. 2 is a schematic cross-sectional view of an electrochromic device, in which two sheets of 41 × 56 cm of glass 1 coated with ITO 2 are prepared, and a portion of a boundary of a small cell as shown in FIG. ITO peeled off on one side. Subsequently, the boundary of the neighboring small cell (subcell) was stripped of the ITO on one side in a direction crossing the boundary of the previous small cell. In this way, the ITO of the boundary line of all the small cells was peeled off only in one direction.

ITO glass obtained by the above method was attached with a spacer 6 formed with a thread, and each corner except the solution inlet was applied to one sheet of ITO glass obtained by the above method with a thermosetting agent (4), and then ITO coated with this thermosetting agent The glass was laminated on one sheet of ITO glass to which the spacer was attached so that the ITO surfaces faced each other, and then cured at 100 ° C. for 30 minutes using a hot presser to prepare a cell.

Dissolve 0.02M of dimethyl dipyridine cathodic reduction component with C ₂ B ₉ H ₁₂ in propylene carbonate solvent, and N, N, N ', N'-tetramethyl-1,4-phenylenediamine (N , N, N ', N'-teteramethyl-1,4-phenylcnediamine) Dissolve 0.02M of anodized components to prepare a electrochromic composition of a viologen system. The electrochromic composition 5 was injected into the cell by a vacuum injector (Shindo KK). Subsequently, after injecting the inlet using a silicone sealant for 3 to 4 hours, the thermosetting agent was applied onto the silicone sealant to cure at least 8 hours at room temperature to seal the inlet, and then to the corners of both ITO surfaces. Indium was applied to form an electrode as shown in the second diagram.

When a voltage of 4.0 V was applied to the electrode of the cell fabricated by the above method, the transmittance of the cell, which was colorless, changed to blue, and when the supply of current was cut off, a reversible reaction that returned colorless occurred.

(Example 2)

2 is a schematic cross-sectional view of an electrochromic device, in which two sheets of 41 × 56 cm of glass 1 coated with ITO 2 are prepared, and a portion of a boundary of a small cell, such as a third tile. ITO on one side was peeled off. Subsequently, the ITO on one side was peeled off in the direction in which the boundary of the adjacent neighboring subcell was crossed with the previous small cell boundary. In this way, ITO was cut out in only one direction of the boundary line of all the small cells.

A small cell 6 formed of optical fiber was attached to one sheet of ITO glass obtained by the above method, and each corner except the solution inlet was applied to one sheet of ITO glass obtained by the above method with the thermosetting agent (4). The coated ITO glass was laminated on one sheet of ITO glass to which the small cells were attached so that the ITO surfaces faced each other, and then cured at 100 ° C. for 30 minutes using a hot presser to prepare a cell.

Dissolve 0.02M dimethyl dipyridine cathodic reduction component with C ₂ B ₉ H ₁₂ in a propylene carbonate solvent, and N, N, N ', N'-tetramethyl-1,4-phenylenediamine (N , N, N ', N'-teteramethyl-1,4-phenylenediamine) Dissolve 0.02M of anodized components to prepare an electrochromic composition of a viologen system. The electrochromic composition 5 was injected into the cell by a vacuum injector (Shindo KK). Subsequently, after injecting the inlet using a silicone sealant for 3 to 4 hours, the thermosetting agent was applied on the silicone sealant to cure at least 8 hours at room temperature to seal the inlet, and then to the corners of both ITO surfaces. Indium was applied to form an electrode as shown in the second diagram. When a voltage of 4.0 V was applied to the electrode of the cell fabricated by the above method, the transmittance of the cell, which was colorless, changed to blue, and when the supply of current was cut off, a reversible reaction that returned colorless occurred.

(Comparative Example)

FIG. 1 is a schematic cross-sectional view of a conventional electrochromic device, in which two sheets of 41 × 56 cm glass coated with ITO are prepared, and each corner of the glass except for the solution inlet is coated with a thermosetting agent. A cell was prepared by overlapping the ITO glass and another sheet of ITO glass obtained by the above method so that the ITO surfaces faced each other and curing at 100 ° C. for 30 minutes using a hot presser.

Dissolve 0.02M of dimethyl dipyridine cathodic reduction component with C ₂ B ₉ H ₁₂ in propylene carbonate solvent, and N, N, N ', N'-tetramethyl-1,4-phenylenediamine (N , N, N ', N'-teleramethyl-1,4-phenylenediamine) Dissolve 0.02M of anodized components to prepare a electrochromic composition of a viologen system. The electrochromic composition 5 was injected into the cell by a vacuum injector (Shindo KK). Subsequently, after injecting the inlet using a silicone sealant for 3 to 4 hours, the thermosetting agent was applied on the silicone sealant to cure at least 8 hours at room temperature to seal the inlet, and then to the corners of both ITO surfaces. Indium was applied to form an electrode as in the first diagram.

The reaction time of the electrochromic devices manufactured according to the above Examples and Comparative Examples was measured, and the results are shown in Table 1 below.

TABLE 1

As described above, the electrochromic device composed of the small cell of the present invention has a fourth current without a voltage drop occurring in the large electrochromic device, i.e., a voltage drop between the ITO planes decreases as it moves away from both electrodes. It flows smoothly like a tile, so that color is rapidly generated when voltage is applied and uniform color distribution is possible.

Claims (4)

An electrochromic device comprising two transparent substrates coated with a conductive film such that the conductive film is disposed to face each other to form a cell, and providing an electrochromic composition in the cell. The conductive layer is formed by removing a portion of the conductive film corresponding to a portion that separates a plurality of small cells, and forming an interface, and an insulating spacer, which is supported by the transparent substrate and installed in the cell, is inserted and disposed. Mick device. The electrochromic device according to claim 1, wherein the insulating spacer is selected from the group consisting of yarn, optical fiber and adhesive. 3. The electrochromic device according to claim 2, wherein the spacer is formed by contacting only one end of a boundary portion formed on both conductive films. 4. The electrochromic device according to claim 3, wherein the boundary portions formed on the both conductive films are alternately formed when the two conductive films face each other.