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Electrochromic device based on organic and inorganic composite material and preparing method of electrochromic device

A technology of electrochromic devices and inorganic composite materials, applied in instruments, nonlinear optics, optics, etc., can solve problems such as poor stability of electrochromic performance, unsatisfactory color changing effect, poor color changing performance, etc., and achieve obvious Effect of color change, low cost, and good electrochromic performance

Active Publication Date: 2018-06-29
NANJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

TiO 2 It has good photoelectric performance, fast ion diffusion rate, stable chemical properties and other characteristics, but as a cathodic electrochromic material, TiO 2 Single color, poor electrochromic performance stability
[0006] Methyl viologen is the simplest and most typical form of viologen small molecule series, and has very good electrochromic properties, but the color stability of devices prepared simply using methyl viologen as an electrochromic material is very poor. Discoloration effect is not ideal
CN 105372897 A discloses an electrochromic device based on ZnO nanotubes and its preparation method. The electrochromic device prepared by modifying ZnO nanotube arrays with methyl viologen improves the electron transmission rate, but produces a single color change
In addition, some people try to add viologen into the electrolyte to prepare electrochromic devices, but at this time viologen is greatly affected by the diffusion rate of the electrolyte, resulting in poor electrochromic performance.

Method used

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  • Electrochromic device based on organic and inorganic composite material and preparing method of electrochromic device
  • Electrochromic device based on organic and inorganic composite material and preparing method of electrochromic device
  • Electrochromic device based on organic and inorganic composite material and preparing method of electrochromic device

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Embodiment 1

[0031] An electrochromic device based on organic-inorganic composite materials. The working electrode is TiO modified with methyl viologen solution grown on the surface. 2 Nanorod thin film FTO conductive glass, the counter electrode is FTO conductive glass, the electrolyte solution uses 0.2M LiClO 4 的γ-butyrolactone solution.

[0032] The structure diagram of the above electrochromic device is as figure 1 As shown, it can be seen from the figure that the upper FTO conductive glass is the counter electrode 6, and the lower surface is grown with TiO 2 The FTO conductive glass of nanorod 5 is the working electrode 7, and TiO 2 The nanorod 5 is modified with methyl viologen 4, the counter electrode and the working electrode are separated by a PET gasket 3, and there is an electrolyte between the two.

[0033] A method for preparing an electrochromic device based on an organic-inorganic composite material, the specific steps are as follows:

[0034] Step 1: Substrate cleaning. Place the ...

Embodiment 2

[0043] A method for preparing an electrochromic device based on an organic-inorganic composite material, the specific steps are as follows:

[0044] Step 1: Substrate cleaning. Place the FTO substrate (2×3cm 2 ) Were washed in acetone, absolute ethanol, and deionized water for 15 minutes, and then washed and dried naturally, and set aside.

[0045] Step 2: Preparation of electrochromic layer. Slowly add 30 mL of deionized water to 30 mL of concentrated hydrochloric acid, add 1 mL of tetrabutyl titanate dropwise after magnetic stirring for 15 minutes, and continue magnetic stirring for 15 minutes. Then transfer the mixed solution to a hydrothermal kettle, put the FTO substrate in step 1 vertically, place the conductive surface downwards at a 45 degree angle to the substrate, seal it and put it in an oven at 180°C, grow it at high temperature for 3.5h Naturally cool to room temperature, take out the TiO 2 For the FTO substrate of the nanorod film, clean the surface of the film with...

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Abstract

The invention discloses an electrochromic device based on an organic and inorganic composite material and a preparing method of the electrochromic device. A hydrothermal method is adopted to prepare auniform TiO2 nanorod array on an FTO substrate, and then an organic matter methyl viologen solution is used for modification and is finally encapsulated into the electrochromic device. According to the electrochromic device, an organic electrochromic material and an inorganic electrochromic material are combined, the disadvantages of a traditional inorganic electrochromic material of being poor in stability and monotonous in color are avoided, three color change states can be generated, and the electrochromic device has quick response, high stability and obvious color change and has potentialadvantages in the aspects of manufacturing an intelligent color-change window, anti-glare glasses, a display, electronic paper and the like.

Description

Technical field [0001] The invention belongs to the field of preparation of electrochromic materials, and particularly relates to an electrochromic device based on an organic-inorganic composite material and a preparation method thereof. Background technique [0002] Electrochromism refers to the phenomenon that the optical properties (transmittance, reflectance or absorptivity) of the material in the ultraviolet, visible or (and) near-infrared region produce stable and reversible changes under the action of an external electric field, and appear as color and Reversible change in transparency. Materials with electrochromic properties are called electrochromic materials. Devices made of electrochromic materials are called electrochromic devices. [0003] The research and development of electrochromic technology has gone through a long and difficult process, since the American scientist S.K. Deb first discovered WO in 1969. 3 The film has certain electrochromic properties, and elec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/155G02F1/15
CPCG02F1/15G02F1/155
Inventor 魏昂田灿灿位威刘羽泽
Owner NANJING UNIV OF POSTS & TELECOMM
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