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Acid-base responsive electrochromic film, its preparation method and application, and electrochromic device

An electrochromic device and electrochromic technology, which are applied in the fields of instruments, nonlinear optics, coatings, etc., can solve the problems of complex preparation methods, high production costs, high energy consumption, etc., and achieve simple and easy preparation methods. The effect of short time and saving power resources

Active Publication Date: 2021-06-11
上海鼎弈材料科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most electrochromic films use ITO glass as the conductive substrate. The assembly methods can be roughly divided into two categories. One method is to deposit the electrochromic film on the surface of the conductive substrate by physical or chemical methods. This method is relatively expensive to manufacture. It is more difficult to obtain a large-sized uniform electrochromic film; another method is to dissolve the electrochromic material in a gel or liquid electrolyte and fill it between two conductive substrates. Although this technology reduces the production cost, However, it is difficult to produce large-size, special-shaped color-changing films
CN101412588A discloses a preparation method of cathode electrochromic film and electrochromic glass, with H 2 WO 4 powder or Ni(NO 3 ) powder as raw material, using citric acid complexation-polymerization liquid phase chemical method, dip coating process or spin coating process to obtain a sol film on an ITO glass substrate, and obtain a cathodic electrochromic film through dry polymerization and low-temperature heat treatment. The method is complex, the electrochromic response time is long and consumes more energy; "Electroacid / Alkali Theory and Its Application in Organic Electrochromic Materials" mentioned that hydroquinone was used as electrochromic alkali, a new type of evil The oxazoline molecule FXF was used as an acid-base response color indicator to prepare an electrochromic device. The response time of the electrochromic device is short, but the stability of the device is poor.
[0004] At present, the global annual electronic display consumes a huge amount of energy, with an annual power consumption of more than 3.5 trillion kilowatt-hours, which is close to 19% of the total global power consumption, equivalent to the total annual power generation of 70 Three Gorges along the Yangtze River; and the traditional electronic display screen is due to Color flickering and background light stimulation will cause irreversible damage to human eyes

Method used

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  • Acid-base responsive electrochromic film, its preparation method and application, and electrochromic device
  • Acid-base responsive electrochromic film, its preparation method and application, and electrochromic device
  • Acid-base responsive electrochromic film, its preparation method and application, and electrochromic device

Examples

Experimental program
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preparation example 1

[0069] figure 1 Schematic diagram of the structure of the acid-base responsive electrochromic film provided for this embodiment, wherein, from bottom to top, it includes an ion storage layer 101, a conductive layer 102 and an electrochromic layer 103, wherein the thickness of the electrochromic layer is 20 μm .

[0070] Wherein, the electrochromic layer includes the following components in parts by weight:

[0071]

[0072] The conductive layer comprises the following components in parts by weight:

[0073] 50 parts by weight of polymethyl methacrylate;

[0074] 35 parts by weight of plasticizer;

[0075] Electrolyte 20 parts by weight.

[0076] The ion storage layer comprises the following components in parts by weight:

[0077]

[0078] The acid response dye is a mixture of aromatic amine substituted urea derivatives and rhodamine derivatives in a mass ratio of 1:2; the base response dye is a mixture of anthraquinone derivatives and bromocresol green in a mass rat...

preparation example 2

[0085] An alkali-responsive electrochromic film comprises an ion storage layer, a conductive layer and an electrochromic layer from bottom to top.

[0086] Wherein, the electrochromic layer includes the following components in parts by weight:

[0087]

[0088] The conductive layer comprises the following components in parts by weight:

[0089] 60 parts by weight of polymethyl methacrylate;

[0090] Plasticizer 40 parts by weight;

[0091] Electrolyte 25 parts by weight.

[0092] The ion storage layer comprises the following components in parts by weight:

[0093]

[0094]

[0095] The acid response dye is; the base response dye is a mixture of anthraquinone derivatives and bromocresol green at a mass ratio of 1:2.5; the plasticizer is propylene carbonate; the electrolyte is lithium bistrifluoromethanesulfonimide.

[0096] In the ion storage layer, the electrogenic acid is N-substituted p-phenylenediamine derivative, and the electrogenic base is p-benzoquinone der...

preparation example 3

[0102] An alkali-responsive electrochromic film comprises an ion storage layer, a conductive layer and an electrochromic layer from bottom to top.

[0103] Wherein, the electrochromic layer includes the following components in parts by weight:

[0104]

[0105] The conductive layer comprises the following components in parts by weight:

[0106] 40 parts by weight of polymethyl methacrylate;

[0107] Plasticizer 25 parts by weight;

[0108] Electrolyte 15 parts by weight.

[0109] The ion storage layer comprises the following components in parts by weight:

[0110]

[0111] The acid response dye is; the base response dye is a mixture of anthraquinone derivatives and bromocresol green in a mass ratio of 1:4; the plasticizer is ethylene carbonate; the electrolyte is lithium perchlorate.

[0112] In the ion storage layer, the electrogenic acid is N-substituted p-phenylenediamine derivative, and the electrogenic base is p-benzoquinone derivative.

[0113] The preparation...

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Abstract

The invention provides an acid-base responsive electrochromic film, its preparation method and application, and an electrochromic device. The acid-base responsive electrochromic film includes an electrochromic layer, and the electrochromic layer is The parts include the following components: 30-50 parts by weight of polymethyl methacrylate; 8-20 parts by weight of acid response dye; 8-20 parts by weight of base response dye; 15-30 parts by weight of plasticizer; 10-25 parts by weight of electrolyte parts by weight; wherein, the acid-responsive dye is a combination of an electroacid and an acid-responsive material, and the base-responsive dye is a combination of an electro-acid and a base-responsive material. The acid-base responsive electrochromic film provided by the invention can undergo stable and reversible color changes under the action of an external electric field, and has electrochromic properties.

Description

technical field [0001] The invention belongs to the field of display technology, and relates to an acid-base responsive electrochromic film, a preparation method and application thereof, and an electrochromic device. Background technique [0002] Electrochromism is the optical property of a material, which refers to a stable and reversible color change under the action of an external electric field or current, which is intuitively manifested as a process in which the color and transparency of the material undergo reversible changes. Since the foreign scholar Plant first proposed the concept of electrochromism in the 1960s, the phenomenon of electrochromism has attracted widespread attention. Electrochromic devices can be prepared by using this electrochromic phenomenon. Electrochromic devices have unique advantages such as wide viewing angle, low driving voltage, and no power consumption memory. Therefore, they are widely used in sensitive windows, displays, and rearview mi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/1516C08J7/04C08J5/18C08L33/12C09D133/12
CPCC08J5/18C08J2333/12C08J2433/12C08J7/0427G02F1/1525
Inventor 张宇模张蔚然张晓安
Owner 上海鼎弈材料科技有限公司
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