Unlock instant, AI-driven research and patent intelligence for your innovation.

Electrochromic composite material and prepared electrochromic device

A composite material and color-induced technology, which is applied in the direction of color-changing fluorescent materials, instruments, chemical instruments and methods, etc., can solve the problems of limiting wide application, reducing the stability of electrochromic devices, chemical side reactions, etc.

Inactive Publication Date: 2016-08-10
JILIN UNIV
View PDF2 Cites 29 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the known organic electrochromic materials, in addition to the disadvantages of slow response speed and limited color options, also have fatal problems of insufficient chemical stability and reversibility, because the existing organic color-changing mechanisms rely on color-changing molecules It is realized by changing the redox state of itself, and this type of discoloration always undergoes a chemically very unstable free radical ion transition state, which is prone to irreversible chemical side reactions, which greatly reduces the efficiency of this type of electrochromic device. stability, which limits the wide application of such materials

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Electrochromic composite material and prepared electrochromic device
  • Electrochromic composite material and prepared electrochromic device
  • Electrochromic composite material and prepared electrochromic device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] In this example, I-1 is used as the electroacid, rhodamine B is used as the pH dye, 1-butyl-3-methylimidazolium hexafluorophosphate is used as the electrolyte, and polymethyl methacrylate is used as the solid medium . Wherein I-1 is X in general formula I 1 , X 2 is methyl, Ar is 1,4 substituted phenyl, X 3 for H, X 4 is 4-dimethylaminophenyl, Y is O, and its structural formula is as follows.

[0057] Electrochromic medium 2 solution preparation: Weigh 1.7g polymethyl methacrylate, 1mL 1-butyl-3-methylimidazolium hexafluorophosphate, 0.3g I-1 and 0.04g rhodamine B in sequence, add acetonitrile Dilute to 10mL.

[0058] Preparation of electrochromic devices: Spin-coat the above electrochromic medium 2 solution onto a clean ITO-1 electrode, and finally assemble the above ITO-1 electrode with another clean ITO-2 electrode to form an electrochromic device, and It conducts a series of studies. The electrochromic device is under positive voltage (+3.0V) (the transparent...

Embodiment 2

[0061] In this embodiment, I-1 is used as the electroacid, rhodamine B is used as the pH dye, 1-butyl-3-methylimidazolium hexafluorophosphate is used as the electrolyte, and polymethyl methacrylate is used as the solid medium. Electrochemically active material with benzoquinone as auxiliary medium 5.

[0062] Solution preparation of electrochromic medium 2: weigh 1.7g polymethyl methacrylate, 1mL 1-butyl-3-methylimidazolium hexafluorophosphate, 0.3g I-1 and 0.04g rhodamine B in sequence, and use Dilute acetonitrile to 10 mL.

[0063] Solution preparation of ion-exchange membrane 4: Weigh 1.7g of polymethyl methacrylate and 1mL of 1-butyl-3-methylimidazolium hexafluorophosphate in sequence, and dilute to 10mL with acetonitrile.

[0064] Solution preparation of auxiliary medium 5: Weigh 1.7g polymethyl methacrylate, 1mL 1-butyl-3-methylimidazolium hexafluorophosphate and 0.2g benzoquinone in sequence, and dilute to 10mL with acetonitrile.

[0065] Device preparation method: 1....

Embodiment 3

[0068]In this embodiment, I-2 is used as the electroacid, rhodamine B is used as the pH dye, 1-butyl-3-methylimidazolium hexafluorophosphate is used as the electrolyte and polymethyl methacrylate as the solid medium, Electrochemically active material with benzoquinone as auxiliary medium 5. Wherein I-2 is X in general formula I 1 、X 2 is H, Ar is 1,4 substituted phenyl, X 3 for H, X 4 is 4-dimethylaminophenyl, Y is O, and its structural formula is as follows.

[0069] Solution preparation of electrochromic medium 2: Weigh 1.7 g of polymethyl methacrylate, 1 mL of 1-butyl-3-methylimidazolium hexafluorophosphate, 0.3 g of I-2 and 0.04 g of rhodamine in sequence, and use acetonitrile Dilute to 10mL.

[0070] Solution preparation of ion-exchange membrane 4: Weigh 1.7g of polymethyl methacrylate and 1mL of 1-butyl-3-methylimidazolium hexafluorophosphate in sequence, and dilute to 10mL with acetonitrile.

[0071] Solution preparation of auxiliary medium 5: Weigh 1.7g polymethy...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses an electrochromic composite material and a prepared electrochromic device, and belongs to the technical field of functional materials. The electrochromic composite material is prepared byblendingan oxidation-reduction material, an electrolyte and a pH dye, wherein the oxidation-reduction material can cause structure and optical property change of the pH dye in contact with the oxidation-reduction material through the acid reversible change under the electric field action. Compared with an existing electrochromic material, the electrochromic composite material has a plurality of advantages; firstly, the electrochromic response speed is high and much higher than that of an existing electrochromic material; secondly, the electrochromic composite material has outstanding stability and reversibility; and the electrochromic composite material hardly has color attenuation through tens of thousands of reversible change color experiments, and is much more excellent than most of existing electrochromic materials. Furthermore, the pH dye is large in quantity; the combined electrochromic composite material has wide color selectivity, and is incomparable to an existing electrochromic material.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and specifically relates to a kind of electrochromic composite material blended with redoxable substances, electrolytes and pH dyes and the preparation of electrochromic devices. Reversible changes to cause changes in the structure and optical properties of pH dyes in contact with them. Background technique [0002] Electrochromism refers to the reversible change of the optical properties (such as color, fluorescence, light transmittance) of a material under an applied electric field. The basic principle of its color change is that this kind of material undergoes electrochemical redox reaction and gain and loss of electrons under the action of an external electric field, so that its own color changes. Molecules with such properties are called electrochromic molecules, and materials with such properties are called electrochromic materials. Electrochromic materials are a kind of light...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C09K9/02G02F1/15
CPCC09K9/02C09K2211/1088G02F1/15G02F2001/1518Y02P20/54
Inventor 张晓安张宇模张蔚然刘国杰
Owner JILIN UNIV