Flexible electrochromic device and preparation method thereof

An electrochromic and chromogenic technology, which is applied in the direction of instruments, nonlinear optics, optics, etc., can solve the problem of thin film easy to fall off and respond to speed, and achieve the effects of improving electrochromic performance, reducing manufacturing costs, and simplifying the structure

Active Publication Date: 2019-12-31
CHANGCHUN UNIV OF TECH
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the application of hydrogel in electrochromic devices mainly focuses on gel electrolytes. Electrochromic materials are usually attached to the electrodes in the form of thin films or free in the electrolyte in the form of small molecules. The thin films are easy to fall off and the response speed is slow. The problem

Method used

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  • Flexible electrochromic device and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Preparation of electrochromic gel:

[0025] Add 8.49g of lithium chloride to 20mL of water, stir and dissolve fully to obtain an electrolyte solution; add 3.555g of acrylamide to the above solution, stir until it dissolves, then add 0.0025g of N,N-methylenebisacrylamide, 0.004g Ammonium persulfate and 10μL N,N,N',N'-tetramethyldiethylamine, mixed evenly; finally add 0.02mol / L potassium tungstate, continue to stir for 1~3h to completely dissolve, and obtain the electro-induced Color changing gel prepolymer solution.

[0026] (2) Preparation of flexible electrochromic devices:

[0027] First, the ITO film conductive electrode was ultrasonically cleaned with deionized water, acetone and isopropanol for 15 minutes respectively, and dried with nitrogen gas for later use; the electrochromic gel prepolymer solution was injected into the space of the silica gel pad clamped on the conductive electrode , heated at 40° C. for 2 hours to obtain an electrochromic gel layer; th...

Embodiment 2

[0029] (1) Preparation of electrochromic gel:

[0030] Add 11.69g of sodium chloride into 20mL of water, stir and dissolve fully to obtain an electrolyte solution; add 3.61g of acrylic acid into the above solution, stir until it dissolves, then add 0.0025g of N,N-methylenebisacrylamide, 0.004g of Ammonium sulfate and 10 μL N,N,N',N'-tetramethyldiethylamine, mix well; finally add 0.02mol / L potassium tungstate, continue to stir for 1~3h to completely dissolve, and obtain electrochromic Gel prepolymer solution.

[0031] (2) Preparation of flexible electrochromic devices:

[0032] First, the FTO film conductive electrode was ultrasonically cleaned with deionized water, acetone and isopropanol for 15 minutes respectively, and dried with nitrogen gas for use; the electrochromic gel prepolymer solution was injected into the space of the silica gel pad clamped on the conductive electrode , heated at 40° C. for 2 hours to obtain an electrochromic gel layer; then take another piece of...

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Abstract

The invention discloses a flexible electrochromic device and a preparation method thereof, and belongs to the technical field of electrochromism. The flexible electrochromic device is composed of twolayers of flexible transparent conductive electrodes and electrochromic gel attached between the two layers of conductive electrodes. The preparation method of the flexible electrochromic device comprises preparation of the electrochromic gel and preparation of the flexible electrochromic device. According to the invention, the electrochromic layer is compounded with an electrolyte layer to prepare the electrochromic gel, so that the structure of the electrochromic device is effectively simplified, the manufacturing cost is reduced, the ion transmission is facilitated, and the electrochromic performance is improved. In addition, a device prepared on the basis of the electrochromic gel material has the characteristics of flexibility, stretchability and the like.

Description

technical field [0001] The invention belongs to the technical field of electrochromism, and relates to a solid-state electrochromic device, a preparation method and application thereof. Background technique [0002] Electrochromism refers to the reversible change of color or transparency of a material under the action of external electric fields such as positive and negative or high and low voltages, that is, the optical properties such as transmittance or reflectance of the material change. Electrochromic devices are realized based on the above characteristics of electrochromic materials, and are widely used in smart windows, non-glare mirrors, displays, and military fields. Traditional electrochromic devices are mostly rigid electronic devices made of glass substrates. In recent years, with the rapid development of wearable and portable electronic devices, thin, light, durable, and bendable flexible electrochromic devices have attracted extensive attention. At present, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/153G02F1/1514
CPCG02F1/153G02F1/1514
Inventor 宋颖邓贤赵丽群
Owner CHANGCHUN UNIV OF TECH
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