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Electrochromic device and color changing method thereof

An electrochromic device and electrochromic technology, applied in the field of color-changing devices, can solve the problems of less electrochromic materials, difficulty in finding cathode electrochromic materials for anode electrochromic materials, and difficulty in switching between colors, etc., to achieve expanded selection range, meet the multi-color display and the effect of personalized customization

Pending Publication Date: 2021-10-12
SHENZHEN GUANGYI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, since there are few types of electrochromic materials at present, it may be difficult to find a cathodic electrochromic material (or anodic electrochromic material) that matches its color for anodic electrochromic materials (or cathodic electrochromic materials). Independent design and development; and the matching colors may all belong to anodic electrochromic materials or cathodic electrochromic materials
This leads to the fact that the electrochromic device with the above structure is easily limited by color, material or process in practical applications, and it is difficult to extend to the mutual switching of more colors.

Method used

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  • Electrochromic device and color changing method thereof
  • Electrochromic device and color changing method thereof

Examples

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Effect test

Embodiment 1

[0114] This embodiment provides an electrochromic device, its structural schematic diagram is as follows figure 1 As shown, it includes a first substrate 1, a first transparent conductive layer 2, a first electrochromic layer 3, an electrolyte layer 4, a second electrochromic layer 5, a second transparent conductive layer 6 and a second substrate 7 stacked in sequence. ; Wherein, the materials of the first electrochromic layer 3 and the second electrochromic layer 5 are all anode electrochromic reduction state coloring materials.

[0115] The preparation method of the electrochromic device is as follows:

[0116] 1) Preparation of the first electrochromic layer 3:

[0117] Dissolve 300mg of poly 2-[(2-ethylhexyloxy)methyl]3,4-thieno-1,4-dioxane in 10mL o-xylene, stir it magnetically for 10h, then drop the obtained solution onto the On the ITO layer (the first transparent conductive layer 2 ) on the glass substrate (the first substrate 1 ), spin-coat and dry to form the first...

Embodiment 2

[0131] This embodiment provides an electrochromic device, its structural schematic diagram is as follows figure 1 As shown, it includes a first substrate 1, a first transparent conductive layer 2, a first electrochromic layer 3, an electrolyte layer 4, a second electrochromic layer 5, a second transparent conductive layer 6 and a second substrate 7 stacked in sequence. ; Wherein, the materials of the first electrochromic layer 3 and the second electrochromic layer 5 are cathode electrochromic oxidation state coloring materials.

[0132] The preparation method of the electrochromic device is as follows:

[0133] 1) Preparation of the first electrochromic layer 3:

[0134] Weigh 80 mg of potassium ferricyanide and dissolve in 25 mL of deionized water, weigh 60 mg of nickel acetate and dissolve in 25 mL of deionized water, and stir evenly. The potassium ferricyanide solution was added to the nickel acetate solution to form a precipitate, and the precipitate was washed three tim...

Embodiment 3

[0148] This embodiment provides an electrochromic device, its structural schematic diagram is as follows figure 1 As shown, it includes a first substrate 1, a first transparent conductive layer 2, a first electrochromic layer 3, an electrolyte layer 4, a second electrochromic layer 5, a second transparent conductive layer 6 and a second substrate 7 stacked in sequence. ; Wherein, the materials of the first electrochromic layer 3 and the second electrochromic layer 5 are cathodic electrochromic reduction state coloring materials.

[0149] The preparation method of the electrochromic device is as follows:

[0150] 1) Preparation of the first electrochromic layer 3:

[0151] Dissolve 100mg, 99.9% pure tungsten powder in 10mL, 30wt% hydrogen peroxide solution, stir at room temperature for 4h, filter off the lower sediment after stirring, add absolute ethanol and glacial acetic acid, and continue stirring for 4h. Then the solution obtained is dropped onto the ITO layer (the first...

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Abstract

The invention provides an electrochromic device and a color changing method thereof. The electrochromic device comprises a first substrate, a first transparent conductive layer, a first electrochromic layer, an electrolyte layer, a second electrochromic layer, a second transparent conductive layer and a second substrate which are stacked in sequence. The first electrochromic layer and the second electrochromic layer are both made of cathode electrochromic materials or anode electrochromic materials. The color changing method comprises the step of circularly applying a voltage which is opposite to and the same as a first voltage in direction to the pre-processed electrochromic device, so that the electrochromic device is switched among different colors. According to the electrochromic device, by adopting the structure that the two electrochromic layers are both the anode electrochromic materials or the cathode electrochromic materials, and in combination with a specific color changing method, the switching between different colors is achieved, and the selection range of the electrochromic materials is expanded.

Description

technical field [0001] The invention belongs to the technical field of color-changing devices, and in particular relates to an electrochromic device and a color-changing method thereof. Background technique [0002] Electrochromism refers to the phenomenon that the optical properties of materials undergo a stable and reversible color change under the action of an external electric field, which is manifested as a reversible change in color and transparency in appearance. Materials with electrochromic properties are called electrochromic materials, and devices made of electrochromic materials are called electrochromic devices. Electrochromic devices have very important application prospects in the fields of color-changing glasses, electronic displays, military concealment, and building energy conservation. [0003] Existing electrochromic devices generally adopt a laminated structure of conductive layer-electrochromic layer-electrolyte layer-ion storage layer (electrochromic ...

Claims

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Application Information

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IPC IPC(8): G02F1/1514G02F1/1516G02F1/1524G02F1/153
CPCG02F1/1514G02F1/15165G02F1/1524G02F1/153G02F2001/1518G02F2001/164G02F1/1516G02F1/163G02F2201/44G02F1/1525
Inventor 程窍何嘉智曹超月
Owner SHENZHEN GUANGYI TECH CO LTD
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