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Electrochromic material based on electrically induced acid effect and electrochromic device prepared from electrochromic material

An electrochromic material and electrochromic device technology, applied in the field of materials, can solve the problems of low color fading, low fading time, low efficiency and speed electrochromic, etc.

Active Publication Date: 2018-11-13
上海鼎弈材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide an electrochromic material based on electroacid action and prepare an electrochromic device, which solves the problem of low efficiency and speed of proton transfer between electroacid molecules and acid-responsive molecules in the prior art and the problem of electrochromic The discolored color is not easy to fade or the problem of fading for a long time

Method used

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  • Electrochromic material based on electrically induced acid effect and electrochromic device prepared from electrochromic material
  • Electrochromic material based on electrically induced acid effect and electrochromic device prepared from electrochromic material
  • Electrochromic material based on electrically induced acid effect and electrochromic device prepared from electrochromic material

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Experimental program
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Effect test

Embodiment 1

[0039] In this embodiment, formula II-1 is used as the electrochromic molecule, 1-butyl-3-methylimidazole hexafluorophosphate is used as the electrolyte, the two are mixed as the electrochromic material, acetonitrile is used as the solvent, and the poly Methyl methacrylate is used as a solid medium. Where formula Ⅱ-1 is R in formula Ⅱ 1 , R 3 N,N-diethyl, R 2 , R 4 , R 5 , R 6 Is hydrogen, Y is oxygen, Ar is benzene ring, Z 1 ,Z 2 It is a methyl group and its structure is shown in formula II-1. The electrochromic medium solution is prepared: 1.7g polymethyl methacrylate, 0.1mL (0.5mmol / L) 1-butyl-3-methyl Imidazole hexafluorophosphate as electrolyte, 3g (5mmol / L) I-1, dilute to 10mL with acetonitrile.

[0040]

[0041] Preparation of electrochromic device: spin-coated the above electrochromic medium solution onto clean ITO-1 electrode, and then assemble it into an electrochromic device. The electrochromic device is under the condition of positive voltage +1.2V. Change from color...

Embodiment 2

[0043] In this embodiment, I-1 is used as the electrochromic molecule, tetrabutylammonium hexafluorophosphate is used as the electrolyte, the two are mixed as the electrochromic material, chloroform is used as the solvent, and polystyrene is used as the solid medium. Wherein formula I-1 is R in general formula I 1 Is methyl, R 2 Is aminophenyl, R 3 N,N-diethyl, R 4 , R 5 , R 6 Is hydrogen, X is amide, Y is oxygen, Ar is benzene ring, Z 1 ,Z 2 It is a methyl group, its structural formula is as shown in formula I-1, the electrochromic medium solution is prepared: 1.7g polystyrene, 0.7g (1.8mmol / L) tetrabutylammonium hexafluorophosphate, 0.3g (0.4 mmol / L) I-1, dilute to 10 mL with chloroform.

[0044]

[0045] Preparation of electrochromic device: spin-coated the above electrochromic medium solution onto a clean ITO-1 electrode, and then assemble it into an electrochromic device. The electrochromic device is at a positive voltage +1.2V. The color transparency turns to black; under n...

Embodiment 3

[0047] In this embodiment, formula VI-1 is used as the electrochromic molecule, lithium perchlorate is used as the electrolyte, the two are mixed as the electrochromic material, acetone is used as the solvent, and polyethylene is used as the solid medium. Where formula Ⅵ-1 is the R in formula Ⅵ 1 , R 3 Is amine ethyl, R 2 , R 4 , R 5 , R 6 Is hydrogen, Y is dimethyl silicon, Ar is naphthalene ring, Z 1 It is a methyl group, and its structural formula is as shown in formula VI-1. The electrochromic medium solution is prepared: 1.7g polyethylene, 0.8g (7.5mmol / L) lithium perchlorate, 0.4g (0.6mmol / L) Ⅵ-1 molecule, dilute to 10mL with acetone.

[0048]

[0049] Preparation of electrochromic device: spin-coated the above-mentioned electrochromic medium solution onto a clean ITO-1 electrode, and then assemble it into an electrochromic device. The electrochromic device is operated at a positive voltage of +1.2V. Colorless and transparent becomes blue; under negative voltage -1.0V, blue...

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Abstract

The invention discloses an electrochromic material based on electrically induced acid effect and an electrochromic device prepared from the electrochromic material. The electrochromic material based on the electrically induced acid effect is prepared by mixing electrochromic molecules and electrolyte; the electrochromic material based on the electrically induced acid effect is used for preparing the electrochromic device; the structure of the electrochromic device is composed of a first electrode, an electrochromic medium, an ion exchange membrane, auxiliary medium and a second electrode. According to the electrochromic material disclosed by the invention, an electrically induced acid part and an acid response part are connected with a molecule, then the coloring efficiency of the electrochromic material served as the electrochromic device can be improved, and the response speed of the electrochromic device also can be increased. After proton being transferred, since the protonated acid response part is connected with a proton donor part of the electrically induced acid through a covalent bond, the acid response part and the proton donor part do not diffuse away from each other, then the proton recovery can be accelerated, namely the color fading speed of the electrochromic device is increased.

Description

Technical field [0001] The invention belongs to the technical field of materials, and relates to an electrochromic material based on intramolecular electroacid action and preparation of electrochromic devices. Background technique [0002] Some organic molecules or groups have weaker acidity before oxidation, but significantly increase their acidity after oxidation. [0003] The combination of electro-acid molecules and acid-responsive molecules can be used to prepare new electrochromic materials, using electricity to control the acidity of electro-acid molecules, and different acidity will stimulate the acid-responsive molecules to produce color changes and produce electrochromic phenomena. However, the previously reported electro-acid system is an intermolecular behavior. The electro-acid molecule and the acid-responsive molecule are two different molecules. When the electro-acid is oxidized, the transfer of protons is from the electro-acid molecule to the acid. Responsive molec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K9/02G02F1/15
CPCC09K9/02C09K2211/1007C09K2211/1088C09K2211/1092C09K2211/1096G02F1/15Y02P20/54
Inventor 张宇模王晓君张晓安
Owner 上海鼎弈材料科技有限公司
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