KR980009422A - Multicolor electrochromic composition and multicolor electrochromic device - Google Patents

Abstract

As the cathode reduction component,

Wherein R ₂₁ and R ₂₂ are independently selected from the group consisting of an alkyl group having 1 to 10 carbon atoms, a phenyl group substituted with a group selected from the group consisting of Cl, Br, cyano, an alkyl group having 1 to 4 carbon atoms, and Cl, Br, A benzyl group substituted with a group selected from the group consisting of an alkyl group having 1 to 4 carbon atoms, and R ₃₁ is an alkyl group having 1 to 10 carbon atoms.

As the anodic oxidation component,

The multicolor electrochromic composition comprising the propyl carbonate and / or the gamma -butyrolactone as a solvent has a blue or blue color depending on the mixture concentration ratio of the red cathodic reducing material and the yellow anodic oxide, Chromatic composition capable of exhibiting crimson color, which is a combination color of red.

Description

Multicolor electrochromic composition and multicolor electrochromic device

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

2 is a photograph showing the result of color development of the electrochromic device of the present invention when a voltage of 1.1 volts or less is applied.

FIG. 3 is a photograph showing the result of color development of the electrochromic device of the present invention when a voltage of 1.1 volts is applied. FIG.

4 is a photograph showing the result of color development of the electrochromic device of the present invention when a voltage of 1.6 volts is applied.

DESCRIPTION OF THE REFERENCE NUMERALS

1: glass substrate 2: ITO film

3: Adhesive 4: Electrode

5: Electrochromic solution

[Industrial Applications]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrochromic composition, and more particularly, to an electrochromic composition used as a mirror for a car, a window glass for controlling transmittance, a display device, And multicolor electrochromic devices.

BACKGROUND ART [0002]

Electrochromic composition is a composition which develops color upon application of voltage and decolors upon removal of voltage, and is used in the fields of automobile mirrors, transmissivity adjusting windowpanes, display devices, and the like.

Such an electrochromic composition comprises a cathode reducing material, an anodizing material and a solvent. The cathode reduction material is a compound in which a viologen-based compound or the like is used as a cation in which the color changes when an electron is obtained, and an anion such as BF ₄ ^- , AsF ₆ ^- , ClO ₄ ^- , NO ₃ ^- At least one compound or electrolyte selected from the group consisting of KBr, KCl, NiCl ₂ , phenazine derivatives and phenylenediamine compounds is used as the oxidizing substance, and examples of the solvent include water, propyl carbonate, An organic solvent such as butyrolactone, ethylene carbonate and the like is used. U.S. Patent No. 5,294,376 describes this in detail.

As shown in FIG. 1, the electrochromic device using such an electrochromic composition has a structure in which an electrically conductive film is formed on an inner surface of an ITO (indium tin oxide) film 2 and two opposed glasses Is formed by inserting the electrochromic composition (5) between the substrate (1) and bonding it with the adhesive (3). In such an electrochromic device, when an electric current flows between a glass substrate coated with an ITO conductive film, positive ions of the cathode reduction component change the color, and the anodic oxidation component smoothes the flow of current while giving electrons to the anode An electrochromic reaction occurs in which the color (transmittance) is changed.

However, in the electrochromic device using the conventional electrochromic composition described above, only one of red, green, and blue colors is developed according to the application of a voltage, so that there is a problem that various colors can not be expressed.

[Problems to be solved by the present invention]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a multicolor electrochromic composition capable of expressing two colors in a single cell, . In addition, the present invention provides a multicolor electrochromic device using the above-described multicolor electrochromic composition.

[MEANS FOR SOLVING THE PROBLEMS]

In order to accomplish the above object, the present invention provides a method of manufacturing an electrochromic device including a first electrochromic material exhibiting a first color at a first voltage, a second electrochromic material exhibiting a second color at a second voltage, a multicolor electrochromic composition including a solvent of the materials Wherein a difference between the first voltage and the second voltage has a predetermined value or more and a color corresponding to the voltage is exhibited at a lower one of the first voltage and the second voltage and a multicolor color having a mixed color of the first color and the second color at a higher voltage Electrochromic composition.

(A) or (c) of the following compounds is used as the negative electrode reducing material of the above-mentioned first electrochromic material and the following compound (b) or d) is used,

Wherein R ₂₁ and R ₂₂ are independently selected from the group consisting of an alkyl group having 1 to 10 carbon atoms, a phenyl group substituted with a group selected from the group consisting of Cl, Br, cyano, an alkyl group having 1 to 4 carbon atoms, and Cl, Br, A benzyl group substituted with a group selected from the group consisting of 1 to 4 alkyl groups, and R ₃₁ is an alkyl group having 1 to 10 carbon atoms), as an anodic oxidation component of the first and second electrochromic materials,

Chromate composition.

The concentration of the cathode reducing material is preferably 0.01 to 0.1 M, and the concentration of the anodic oxide is preferably 0.01 to 0.1 M. If the concentration is lower than the above-mentioned concentration, the concentration of the developed color becomes lower, and if it is higher than the above-mentioned concentration, the decoloration may not be performed well.

In the present invention, it is preferable that the solvent is propyl carbonate and / or? -Butyrolactone.

The present invention also relates to a cathode reducing material, which comprises a combination of (a) and (b) or a combination of (c) and (d)

Wherein R ₂₁ and R ₂₂ are independently selected from the group consisting of an alkyl group having 1 to 10 carbon atoms, a phenyl group substituted with a group selected from the group consisting of Cl, Br, cyano, an alkyl group having 1 to 4 carbon atoms, and Cl, Br, A benzyl group substituted with a group selected from the group consisting of an alkyl group having 1 to 4 carbon atoms, and R ₃₁ is an alkyl group having 1 to 10 carbon atoms.

As the anodic oxidation component,

There is provided a multicolor electrochromic composition comprising propyl carbonate and / or? -Butyrolactone as a solvent.

The present invention also relates to the above-described polychromatic electrochromic composition of the present invention, which is injected into a sealing operation between two transparent substrates coated with a conductive film so that the conductive films face each other and the opposite conductive film of the transparent substrate, A multicolor electrochromic device comprising two electrodes formed on one end of a conducting film of a substrate, wherein the multicolor electrochromic device has a color changing color developed according to a voltage applied thereto.

[Example]

Hereinafter, preferred embodiments of the present invention will be described. However, the following embodiments are merely preferred embodiments of the present invention in order to facilitate understanding of the present invention, and the present invention is not limited to the following embodiments.

[Example 1]

As an electrochromic device having a structure as shown in FIG. 1, two ITO-coated glass pieces each having a size of 7 × 5 cm were stacked so that the ITO side of each corner except the solution injection port was opposed to the ITO side The cells were cured by a hot press in a 100 占 폚 oven for 30 minutes.

And propyl carbonate in an organic solvent C ₂ B ₉ H ₁₂ ^- dissolved in dimethyl pyridine (dimethyldipyridine) cathode reducing component 0.1M attached groups are C ₂ B ₉ H ₁₂ ^- group is 1,3-di (1'-methyl-4 attached , 4'-dipyridinium) propyl [1.3'di (1'methyl-4,4'-dipyridinium) -propy] cathode reduction component was dissolved in 0.08M, then the anodic oxidation component of ferrocene was dissolved in 0.11M, Mick composition was prepared.

The electrochromic composition was injected into the cell through a vacuum injector (Shindo Kiken Co., Ltd.). Subsequently, the solution injection port was sealed using a silicon silant, and after a lapse of 3 to 4 hours, a thermosetting agent was applied on the silicone sealant and cured at room temperature for 8 hours or more to seal the injection port. Ag was applied to the edges to form electrodes as in the first figure, thereby producing a multicolor electrochromic device.

As a result of applying a voltage to the electrode of the cell fabricated by the above method, the color was initially colorless as shown in the photograph of FIG. 2, but from 1.1 volts, the green color was developed as shown in the photograph of FIG. When the voltage exceeded a volt, the blue color developed as shown in the photograph of FIG. On the contrary, when the voltage was reduced, the color changed from blue to blue, and when the voltage was less than 1.1 volts, the color changed to colorless. Such a change is observed when a voltage of 1.1 volts or more is applied to develop a blue electrochromic material to emit a blue color, and when a voltage of 1.6 volts or more is applied at a voltage of 1.6 volts or more, The electrochromic substance is expressed and the red color is expressed. As a result, when the color is 1.6 volts or more, the primary color blue and the primary color red are mixed and expressed to express the indigo color.

[Effects of the Invention]

As described above, according to the electrochromic composition of the present invention, the blue color or the combination of red and blue colors can be realized according to the mixture concentration ratio of the red cathodic reducing material and the blue anodic oxide, It is possible.

Claims (5)

A first electrochromic material exhibiting a primary color at a first voltage; A second electrochromic material exhibiting a second color at a second voltage; The solvent of said materials; Wherein the difference between the first voltage and the second voltage has a predetermined value or more and a color corresponding to the voltage is exhibited at a lower voltage of the first voltage and the second voltage, A multicolor electrochromic composition in which a mixed color of zeolite appears. The method according to claim 1, wherein (a) or (c) of the following compounds is used as the cathode reducing material of the first electrochromic material and the following compound (b) or (d ) Is used, Wherein R ₂₁ and R ₂₂ are independently selected from the group consisting of an alkyl group having 1 to 10 carbon atoms, a phenyl group substituted with a group selected from the group consisting of Cl, Br, cyano, an alkyl group having 1 to 4 carbon atoms, and Cl, Br, A benzyl group substituted with a group selected from the group consisting of 1 to 4 alkyl groups, and R ₃₁ is an alkyl group having 1 to 10 carbon atoms), said first and second electrochromic materials are anodizing components, Lt; RTI ID = 0.0 > electrochromic < / RTI > The multicolor electrochromic composition according to claim 2, wherein the concentration of the cathode reduction component is 0.01 to 0.1 M and the concentration of the anodization component is 0.01 to 0.1 M. 4. The multicolor electrochromic composition of claim 3, wherein the solvent is propyl carbonate and / or gamma -butyrolactone. Two transparent substrates coated with a conductive film and arranged so that the conductive film faces each other; The electrochromic composition according to claim 1, which is injected into a sealing work between the opposed conductive films of the transparent substrate; Two electrodes formed on one end of the conductive film of the two transparent materials; Wherein the color of the multicolor electrochromic device is changed according to an applied voltage. ※ Note: It is disclosed by the contents of the first application.