Flexible electrochromic device and preparation method thereof

An electrochromic and chromogenic technology, which is applied in the direction of instruments, nonlinear optics, optics, etc., can solve the problems of uneven discoloration, research on flexible electrochromic devices that needs to be deepened, and functions that cannot be guaranteed.

Pending Publication Date: 2020-09-29
CHINA LUCKY FILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the flexibility of the current electrochromic devices is poor, and their functions cannot be guaranteed after repeated bending, and there ...

Method used

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  • Flexible electrochromic device and preparation method thereof
  • Flexible electrochromic device and preparation method thereof
  • Flexible electrochromic device and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] (1) Material:

[0060] The first substrate 11 with the first electrode layer 12 on the surface and the second substrate 22 with the second electrode layer 21 on the surface: ITO / PET (purchased from Oike Industry Co., Ltd.);

[0061] Electrochromic particles: tungsten oxide nanoparticles (purchased from Beijing Deke Daojin Technology Co., Ltd.), its basic performance indicators are content (%): 99.9, average particle size: 40nm, specific surface area: 30m 2 / g, particle shape: spherical;

[0062] Electrolyte: PVB+PC+LiClO 4 (available from Sigma-Aldrich);

[0063] Barrier layer: PMMA (purchased from Aladdin);

[0064] Filler particles: SiO 2 Particles (purchased from Beijing Deke Daojin Technology Co., Ltd.).

[0065] (2) Preparation of flexible electrochromic devices

[0066] A. Weigh tungsten oxide nanoparticles, LiClO 4 Add PC solution dropwise to tungsten oxide nanoparticles, insert electrodes (sheets or rods made of copper, stainless steel or aluminum), and e...

Embodiment 2

[0073] (1) Material:

[0074] The first substrate 11 with the first electrode layer 12 on the surface and the second substrate 22 with the second electrode layer 21 on the surface: ITO / PET (purchased from Oike Industry Co., Ltd.);

[0075] Barrier layer: ITO / PET / ITO (purchased from Oike Industry Co., Ltd.);

[0076] Electrochromic particles: tungsten oxide nanoparticles (purchased from Beijing Deke Daojin Technology Co., Ltd.), its basic performance indicators are content (%): 99.9, average particle size: 40nm, specific surface area: 30m 2 / g, particle shape: spherical;

[0077] Electrolyte: PVB+PC+LiClO 4 (available from Sigma-Aldrich);

[0078] Filler particles: montmorillonite particles and glass particles (purchased from Beijing Deke Daojin Technology Co., Ltd.).

[0079] (2) Preparation of flexible electrochromic devices

[0080] A. Weigh tungsten oxide nanoparticles, LiClO 4 Add PC solution dropwise to tungsten oxide nanoparticles, insert electrodes (sheets or rods...

Embodiment 3

[0087] Compared with Example 1, only the materials used in the first electrode layer and the second electrode layer in Example 1 were changed to silver nanowires, the material of the barrier layer was changed to PVB, and other materials were the same.

[0088] (2) Preparation of flexible electrochromic devices

[0089] The preparation process is exactly the same as that of Example 1.

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Abstract

The invention provides a flexible electrochromic device and a preparation method thereof. The flexible electrochromic device comprises: a first substrate, a first electrode layer arranged on the surface of the first substrate, a second substrate, a second electrode layer arranged on the surface of the second substrate, n functional layers and n-1 barrier layers, wherein the n functional layers andthe n-1 barrier layers are alternately arranged between the first electrode layer and the second electrode layer, the first electrode layer and the second electrode layer are both in contact with thefunctional layers, n is a positive integer larger than or equal to 2, and the functional layers comprise electrolyte and electrochromic particles dispersed in the electrolyte. Therefore, the drivingvoltage of the flexible electrochromic device is relatively low, and the color changing speed is higher so that the color changing of the device is relatively uniform in the color changing process; the electrochromic particles are dispersed in the electrolyte so that the integrity of the electrochromic particles is not damaged when the flexible electrochromic device is bent for multiple times or the bending angle is relatively large, and the safe use of the device is further ensured; and the manufacturing cost of the device is low.

Description

technical field [0001] The invention relates to a flexible electrochromic device and a preparation method thereof. Background technique [0002] Electrochromic devices usually include two opposite transparent electrodes, and there are one or more kinds of electrochromic particles on these two opposite transparent electrodes, and between these two opposite transparent electrodes is filled with what is called " Electrolyte layer" (or "ion-conducting layer"), which is capable of conducting the ions that cause the electrochromic particles to change color. Because electrochromism is an electrochemical phenomenon, the performance of the electrolyte layer will affect the color-changing reaction and color-changing memory of the electrochromic device. Therefore, shortening the conduction time of ions in the electrolyte layer will greatly shorten the color-changing reaction time of the electrochromic device. This fast conduction of ions is obtained in the liquid electrolyte layer. ...

Claims

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Application Information

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IPC IPC(8): G02F1/155G02F1/153G02F1/1506G02F1/1523
CPCG02F1/155G02F1/153G02F1/1506G02F1/1523
Inventor 安曼刘邵帅焦康许剑
Owner CHINA LUCKY FILM CORP
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