A fast-fading electrochromic material

An electrochromic material and fast technology, applied in the direction of color-changing fluorescent materials, chemical instruments and methods, etc., can solve problems such as difficult to achieve mass production and complicated operation process, and achieve the effect of shortening the fading time

Active Publication Date: 2022-05-17
杭州燕麟科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the use of FTO transparent conductive glass, titanium dioxide needs to be deposited on the FTO film at high temperature, the operation process is relatively complicated, and it is difficult to achieve mass production

Method used

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  • A fast-fading electrochromic material
  • A fast-fading electrochromic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add 0.1 g of fullerene to 500 ml of propylene carbonate electrolyte, and disperse by ball milling for 8 hours until the particle size is less than 10 nanometers. Add 30mM 4,4'-di-n-heptyl bipyridine fluoroborate and 25mM 5,10-dimethyldihydrophenazine after dispersion, and inject two pieces of transparent conductive glass with a size of 50mm*50mm*70 microns And in devices made of sealants. Connect the DC1.2V power supply between the two pieces of glass, the color change (visible light transmittance 75%-20%@550nm) takes 1.5s, disconnect the power supply, fade (visible light transmittance@550nm 20%-75%) ) time is 2.0s.

Embodiment 2

[0033] Add 0.2g of carbon nanotubes to 300ml of propylene carbonate and 200ml of fluoroethylene carbonate electrolyte, ball mill to disperse for 2 hours, ultrasonically disperse for 2 hours and then ball mill for 2 hours until the diameter is less than 40 nanometers and the length is less than 5 microns. Add 30mM 4,4'-di-n-heptyl bipyridine fluoroborate and 25mM 5,10-dimethyldihydrophenazine after dispersion, and inject two pieces of transparent conductive glass with a size of 50mm*50mm*70 microns And in devices made of sealants. Connect the DC1.2V power supply between the two pieces of glass, the color change (visible light transmittance 75%-20%@550nm) takes 1.2s, disconnect the power supply, fade (visible light transmittance@550nm 20%-75%) ) time is 1.8s.

Embodiment 3

[0035] Add 0.5g of conductive titanium dioxide nanoparticles to 200ml of propylene carbonate and 300ml of γ-butyrolactone electrolyte, and disperse by ball milling for 8 hours until the particle size is less than 10 nanometers, then add 30mM 4,4'-di-n-heptyl bipyridine after the dispersion is complete Fluoroborate and 25mM 5,10-dimethyldihydrophenazine were dissolved and injected into a device consisting of two pieces of transparent conductive glass with a size of 50mm*50mm*70 microns and a sealant. Connect the DC1.2V power supply between the two pieces of glass, the color change (visible light transmittance 75%-20%@550nm) takes 1.3s, disconnect the power supply, fade (visible light transmittance@550nm 20%-75%) ) time is 2.1s.

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Abstract

The invention discloses a fast electrochromic material, which comprises an organic cathode electrochromic material, an anode electrochromic material and an electrolytic solution, wherein conductive particles are suspended in the electrolytic solution. The invention provides that conductive particles are added to the electrolyte solution containing the electrochromic material to provide an annihilation place nearby for the positively and negatively charged electrochromic material without migrating to the opposite electrode, thereby shortening the fading time.

Description

technical field [0001] The invention relates to an electrochromic material, in particular to a fast-fading electrochromic material, which is mainly applied to an electrochromic device and improves the fading rate of the device. Background technique [0002] Electrochromism (elecrtochromism) means that when an electric field or current is applied to a color-changing material, the optical properties of the material (light transmittance, reflectivity or absorptivity) produce a stable and reversible color within a certain wavelength range including visible light wavelengths. phenomenon of change. In terms of appearance performance, electrochromism is manifested as a reversible change in color and transparency. When a certain polarity voltage is applied to the electrochromic material, the visible light transmittance of the material increases, this phenomenon is called "fading". When the polarity of the voltage is opposite, the light transmittance of the material increases again....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K9/02
CPCC09K9/02C09K2211/1029C09K2211/1044
Inventor 宋义林
Owner 杭州燕麟科技有限公司
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