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A kind of flexible electrochromic device and preparation method thereof

An electrochromic layer and chromogenic technology, applied in the direction of instruments, nonlinear optics, optics, etc., can solve the problems of complex process and device thickness reduction, and achieve uniform color change, device thickness reduction, and wide application range Effect

Inactive Publication Date: 2017-08-08
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The present invention overcomes the traditional method of preparing a single functional layer first and then stacking and encapsulating the device to obtain a device with complex process. The method of depositing the electrochromic layer and the ion storage layer on both sides of a diaphragm forms a highly integrated device structure. The preparation and packaging process is simplified, and the thickness of the obtained device is greatly reduced; and the obtained electrochromic device has good cycle stability, long life, uniform color change, and fast response time

Method used

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  • A kind of flexible electrochromic device and preparation method thereof
  • A kind of flexible electrochromic device and preparation method thereof
  • A kind of flexible electrochromic device and preparation method thereof

Examples

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preparation example Construction

[0029] The present invention also provides a method for preparing a flexible electrochromic device, comprising the following steps:

[0030] Step 1: Clean the diaphragm;

[0031] Step 2: Depositing the first conductive metal film 2 and the second conductive metal film 3 on both sides of the diaphragm;

[0032] Step 3: Deposit an electrochromic layer 4 and an ion storage layer 5 on the surfaces of the first metal conductive film 2 and the second metal conductive film 3 obtained in step 2, respectively;

[0033] Step 4: Coating the electrolyte on the surface of the ion storage layer to fully infiltrate and penetrate the diaphragm;

[0034] Step 5: Leading out the first metal conductive film 2 and the second metal conductive film 3 by using conductive metal foil as upper and lower electrodes, and then encapsulating with a transparent thin film to obtain an electrochromic device.

[0035] Further, the diaphragm 1 described in step 1 is a flexible membrane such as a polyethersulf...

Embodiment 1

[0038] In this example, a nylon filter membrane (thickness 0.25 μm, pore size 0.1 μm) is used as the diaphragm material. The nylon filter membrane has good ion and electrolyte permeability, strong corrosion resistance, high strength, and certain flexibility. The electrolyte can still maintain good flatness after soaking and drying, and the surface of the filter membrane can be firmly combined with the evaporated gold particles. The materials of the electrochromic layer and the ion storage layer in this example are both polyaniline (PANI), because PANI has rich color changes, fast response speed, and good film-forming uniformity.

[0039] A flexible electrochromic device comprises a nylon filter membrane, gold films deposited on both sides of the nylon filter membrane, PANI electrochromic layers and PANI ion storage layers deposited on the surfaces of both gold films.

[0040] A method for preparing a flexible electrochromic device, specifically comprising the following steps: ...

Embodiment 2

[0048] The difference between this example and Example 1 is that the polyaniline film is deposited on both sides of the nylon filter membrane gold membrane by chemical oxidation polymerization. , and ultrasonically obtain a uniform solution; put the nylon filter membrane (5×5m) with gold film on both sides obtained in step 2 into the solution, and stir for 2h; dissolve 2g of ammonium persulfate (APS) in 60mL of deionized water , to obtain an ammonium persulfate solution; the prepared ammonium persulfate solution was slowly added dropwise to the above-mentioned solution with a filter membrane, and continued to stir for 12 hours; after the reaction was completed, the prepared polyaniline film was rinsed with deionized water to remove The oligomers on the surface of the film were left to dry for later use.

[0049] The flexible electrochromic device provided by the present invention is based on a flexible diaphragm with a conductive metal film evaporated on both sides. Electroche...

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Abstract

A flexible electrochromic device belongs to the technical field of functional materials and devices. It includes a membrane soaked in electrolyte, a first metal conductive film and a second metal conductive film deposited on both sides of the membrane, an electrochromic layer deposited on the surface of the first metal conductive film, and an ion storage layer deposited on the surface of the second metal conductive film. The electrochromic device of the present invention deposits an electrochromic layer on one side of a flexible diaphragm with gold films on both sides, deposits an ion storage layer on the other side, and then coats an electrolyte and packages the electrochromic device. The present invention overcomes the traditional method of preparing a single functional layer first and then stacking and encapsulating the device to obtain a device with complex process. The method of depositing the electrochromic layer and the ion storage layer on both sides of a diaphragm forms a highly integrated device structure. The preparation and packaging process is simplified, and the thickness of the obtained device is greatly reduced; and the obtained electrochromic device has good cycle stability, long service life, uniform color change and fast response time.

Description

technical field [0001] The invention belongs to the technical field of functional materials and devices, and in particular relates to a flexible electrochromic device and a preparation method thereof. Background technique [0002] Electrochromism refers to the phenomenon that under the action of an external electric field, the reversible redox reaction of the material leads to changes in its optical properties (transmittance, absorptivity, reflectivity), and is manifested as a reversible change in color and transparency in appearance. . As early as the 1930s, there were related reports on electrochromism. With the deepening of research, people gradually realized the potential application value of electrochromism. Electrochromic devices have been widely used in the fields of electrochromic energy-saving smart windows, automotive rearview anti-glare mirrors and display devices. [0003] Most of the existing electrochromic device structures such as figure 2 As shown, 6 is a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/15G02F1/153G02F1/155
CPCG02F1/15G02F1/15165G02F1/1533G02F1/155
Inventor 贾春阳周萍刘彦宁万中全翁小龙邓龙江
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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