Electrochromism material and electrochromism device

A technology of electrochromic materials and electrochromic devices, which is applied in the direction of color-changing fluorescent materials, instruments, chemical instruments and methods, etc., can solve problems such as complex discoloration mechanisms, and achieve the effects of avoiding harm, improving stability, and improving performance

Active Publication Date: 2012-09-26
NINGBO MI RUO ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its discoloration mechanism is relatively complex, most of which involve the gain and loss of electrons, resulting in different colored reactants and products.
In practical applications, the coloring rate (the optical density change caused by the charge energy injected per unit area of ​​the film), the response characteristics (under the action of the operating voltage, the change of the current with time during the discoloration process), and the storage characteristics (the film remains unchanged after the external electric field is removed) The ability to maintain the characteristics of the device), life (the number of coloring-fading cycles at a specific operating voltage) and the mobility of color-changing materials have received great limitations

Method used

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  • Electrochromism material and electrochromism device
  • Electrochromism material and electrochromism device
  • Electrochromism material and electrochromism device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1, the preparation method of described cathodic electrochromic material (I) is: the 4 of 0.1mol, the 4'-dipyridine and the bromoethane of 0.1mol are dissolved in the acetonitrile solution of 200ml, heat reflux under agitation 12 Cool to room temperature and filter after 1 hour to obtain about 0.07 mol of 4-ethyl 4,4'-bipyridine derivatives; combine 0.05 mol of the above-mentioned monosubstituted 4,4'-bipyridine derivatives with 0.05 mol of methacrylic acid Ethyl bromide reacts to obtain 4,4'-bipyridine disubstituted derivatives containing double bonds; the above 0.01mol of 4,4'-bipyridine disubstituted derivatives containing double bonds and 0.1mol methyl methacrylate In the ethanol solution, add 0.02g of azobisisobutyronitrile as a free radical initiator to carry out copolymerization to obtain the cathodic electrochromic material (I).

[0030] The structural characterization of the above product is as follows: H 1 NMR (DMSO-d 6 ): δ8.95(4H), 8.84(4H), 4.51...

Embodiment 2

[0037] Example 2, preparation of cathodic electrochromic material, 0.1mol of 4,4'-dipyridine and 0.1mol of bromohexanol were dissolved in 200ml of acetonitrile solution, heated to reflux under stirring for 12 hours, cooled to room temperature and filtered, Obtain about 0.05mol of 4-hexyl 4,4'-bipyridine derivatives; react 0.02mol of the above-mentioned monosubstituted 4,4'-bipyridine derivatives with 0.02mol of bromoethylpropyl acrylate to obtain 4,4'-bipyridine disubstituted derivatives; the above 0.01mol 4,4'-bipyridine disubstituted derivatives containing double bonds and 0.05mol butyl methacrylate in ethanol solution, add 0.02g bipyridine The cathodic electrochromic material (I) is obtained by copolymerizing nitrogen diisobutyronitrile as a free radical initiator.

[0038] The structural characterization of the above product is as follows: H 1 NMR (DMSO-d 6 ): δ9.02(4H), 8.91(4H), 4.82(4H), 4.53(12H), 3.68~3.44(32H), 1.91(8H), 1.33~0.95(38H). It can thus be explained th...

Embodiment 3

[0045] Embodiment three, the making of cathodic electrochromic material (I), the 4 of 0.1mol, the 4 '-bipyridine and the bromobutanol of 0.2mol are dissolved in the 300ml acetonitrile solution, are cooled to Filtrate at room temperature to obtain about 0.07 mol of 4,4'-dihydroxybutyl 4,4'-bipyridine derivatives; mix 0.05 mol of the above-mentioned disubstituted 4,4'-bipyridine derivatives with 0.05 mol of methyl Bromomethyl acrylate is reacted to obtain 4,4'-bipyridine disubstituted derivatives containing double bonds; the above 0.01mol of 4,4'-bipyridine disubstituted derivatives containing double bonds and 0.04mol methyl methacrylate Add 0.02 g of azobisisobutyronitrile as a radical initiator to copolymerize the ester in ethanol solution to obtain the compound of cathodic electrochromic material (I).

[0046] The structural characterization of the above product is as follows: H 1 NMR: δ8.64(4H), 8.37(4H), 5.23, (1H), 4.89(4H), 3.68-3.44(16H), 2.03(4H), 1.35-0.98(26H). It c...

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Abstract

The invention relates to an electrochromism material and an electrochromism device. The electrochromism material comprises a cathode electrochromism material (I) and an anode electrochromism material (II). The cathode electrochromism material (I) and the anode electrochromism material (II) are subjected to combination reaction and then are cured in an electrolyte, thereby forming gelatinous electrochromism material. The electrochromism device comprises a piece of glass (1) plated with a transparent conductive film (2) and a substrate (1) plated with a conductive reflecting layer (4). The gelatinous electrochromism material is arranged between the transparent conductive film (2) and the conductive reflecting layer (4). The invention has the advantages that the cathode and anode electrochromism materials are respectively grafted with a polymer and then are cured in the electrolyte, thereby forming the gelatinous electrochromism material; the stability of color change is increased; and the harm caused by electrolyte leakage when the electrochromism device is damaged by an external force is effectively avoided, so that the practical application property of the electrochromism material is further increased.

Description

technical field [0001] The invention relates to a new electrochromic material and an electrochromic device made by using the electrochromic material. Background technique [0002] Electrochromism refers to the phenomenon that the optical properties (transmittance, reflectivity or absorptivity) of a substance undergo a stable and reversible change within the wavelength range of visible light under the action of an external electric field or current. In terms of appearance, electrochromism is characterized by reversible changes in color and transparency, and is often used as a passive display device. Although the research on electrochromism has been reported since the 1930s and has made great progress, there are still many problems in theory and practical application. Viologen, rare earth phthalocyanine, pyrazine, polyaniline, and some conductive organic polymers are organic materials with electrochromic properties. Its discoloration mechanism is relatively complicated, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K9/02C08F220/14C08F220/18C08F220/34C08G18/65C08G18/62C08G18/32C07D241/46G02F1/15
Inventor 仝泽彬胡珊珊曹贞虎林邦
Owner NINGBO MI RUO ELECTRONICS TECH CO LTD
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