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Electrochromic material, device and preparation method thereof

A technology of electrochromic materials and electrochromic devices, which is applied in the field of electrochemical devices and can solve problems such as poor bistable properties, influence, and poor transmittance changes

Pending Publication Date: 2022-02-08
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The problem solved by the present invention is that the change of transmittance of electrochromic devices in the prior art is poor, and the bistable properties are also poor, which affects at least one aspect of its wide range of applications in the field of electrochromic

Method used

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  • Electrochromic material, device and preparation method thereof
  • Electrochromic material, device and preparation method thereof
  • Electrochromic material, device and preparation method thereof

Examples

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preparation example Construction

[0056] combine image 3 As shown, another embodiment of the present invention provides a method for preparing an electrochromic device, comprising the following steps;

[0057] Step S1, preparing a conductive transparent electrode containing a cuprous salt film;

[0058] Step S2, preparing a polymer of fluoran dye molecules;

[0059] Step S3, using the conductive transparent electrode containing the cuprous salt film described in step S1 and the fluoran dye molecular polymer described in step S2 to prepare an electrochromic device.

[0060] In some embodiments, in step S1, the method for preparing the conductive transparent electrode containing the cuprous salt film includes electro-redox method, measurement and control sputtering or vacuum evaporation, and the method is simple.

[0061] In some preferred embodiments, in step S1, the method for preparing a conductive transparent electrode containing a cuprous salt film specifically includes:

[0062] Step S11, dissolving ba...

Embodiment 1

[0090] The present embodiment provides a kind of preparation method that takes rhodamine dye molecule as the polymer of monomer, comprises the steps:

[0091] Step S21, adding 4.78g of aminorhodamine, 5.6ml of triethylamine and 40ml of redistilled dichloromethane into a 100ml round bottom flask to dissolve the aminorhodamine to form a red mixed solution;

[0092] Step S22, take 1.8mL methacryloyl chloride in the sample tube, dilute to 10mL, and slowly drop the diluted solution into the above-mentioned dichloromethane solution containing aminorhodamine and triethylamine immersed in an ice-water bath. A large amount of white mist will be generated and heat will be released. After the reaction is stable, the ice-water bath is removed and stirred at room temperature for 24 hours. After the reaction is completed, the reaction solution is concentrated and separated by column chromatography to obtain the aminorhodamine acid chloride monomer;

[0093] Step S23, dissolving 525mg of ami...

Embodiment 2

[0099] This embodiment provides a method for preparing a solid-state electrochromic device, including the following steps;

[0100] Step S1, prepare the ITO glass that contains cuprous iodide thin film, specifically comprise:

[0101] Step S11, take 22g of basic copper carbonate, 15g of disodium edetate, and 0.4g of ammonium nitrate, dissolve them in 1000mL of water at 50°C, and then use sodium hydroxide to adjust the pH value of the solution to 11-13. Get the plating solution. Subsequently, the plating solution is electrolyzed with the ITO glass as the cathode and the graphite electrode as the anode. During electrolysis, it is necessary to maintain the current density at 1-3A / dm2, and the bath temperature at 40-60°C. After electroplating for 1 second, wash off the excess plating solution on the cathode with deionized water, and dry it to obtain an ITO glass with a copper film attached, such as Figure 4 shown;

[0102] Step S12, put the above-mentioned copper-attached ITO...

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Abstract

The invention provides an electrochromic material, a device and a preparation method thereof, and relates to the technical field of electrochemical devices, and the electrochromic material comprises a cuprous salt film and a fluorane dye molecular polymer. The cuprous salt is used as a stimulation response molecule, the coordination effect between copper ions and fluorane dye molecules is regulated and controlled through electrochemical redox so that lactone rings of the dye molecules are opened or closed, and certain fluorane dyes are relatively stable in open-loop and closed-loop states, therefore, the obtained electrochromic device has better bistable property and better transmittance change.

Description

technical field [0001] The invention relates to the technical field of electrochemical devices, in particular to an electrochromic material, a device and a preparation method thereof. Background technique [0002] Electrochromic materials are a type of stimuli-responsive materials. One of the characteristics of electrochromic materials is that they can control the different color states of materials by adjusting electrical signals that are easy to control. An electrochromic device is a device assembled using electrochromic materials and some other parts (ITO glass, conductive adhesive, edge sealant, etc.) that can change the color state by controlling the current. Compared with traditional LED, OLED and other display technologies, the advantage of electrochromism is that it does not emit strong light to stimulate the eyes and is more friendly to the human body. However, the transmittance of the electrochromic device in the prior art is poor, and the bistable property is al...

Claims

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Application Information

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IPC IPC(8): C09K9/02G02F1/1516
CPCC09K9/02G02F1/15165C09K2211/145
Inventor 张宇模申睿鹏张晓安王宇洋
Owner JILIN UNIV
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