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Nanocrystalline enhanced tungsten oxide electrochromic film and preparation method thereof

An electrochromic and nanocrystalline technology, applied in the field of inorganic functional materials, can solve the problems of short cycle life of electrochromic materials, lack of near-infrared modulation ability, slow response rate of discoloration of large-sized materials, etc., to improve electrochromic performance Effect

Inactive Publication Date: 2015-11-11
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a nanocrystalline enhanced tungsten oxide electrochromic film, which solves the problems of short cycle life of existing tungsten oxide-based electrochromic materials, slow discoloration response rate of large-sized materials and lack of near-infrared modulation ability

Method used

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  • Nanocrystalline enhanced tungsten oxide electrochromic film and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Preparation of "ITO nanocrystal-WO 3 Amorphous" electrochromic film:

[0025] Take 0.9914g of tungsten chloride, 0.0477g of indium nitrate, and 0.0046g of tin nitrate, dissolve them in 49.5mL of methanol, add 0.5mL of deionized water to it, and stir at room temperature for 2 hours to fully dissolve, and then obtain tungsten, indium, The composite sol of tin; the obtained composite sol is uniformly coated on the transparent conductive oxide glass substrate by dipping or spin-coating technology to form a gel film, dried at 150°C for 10 minutes, and then placed in a heat treatment furnace 200 ~ 300 ℃ in an oxygen atmosphere for 1h, then take it out, air-cooled to room temperature to get "ITO nanocrystal-WO 3 Amorphous" dual-phase composite thin films.

[0026] The transmittance curves of the colored state and the faded state of the film obtained in this embodiment are as follows: figure 1 As shown, the optical modulation contrast ΔT% in the visible light band is 70%; th...

Embodiment 2

[0028] Preparation of "ITO nanocrystal-WO 3 Amorphous" electrochromic film:

[0029] Take 3g of tungsten chloride, 0.5777g of indium nitrate, and 0.055g of tin nitrate, dissolve them in 49.5mL of ethanol, add 0.5mL of deionized water to it, and stir at room temperature for 2 hours to dissolve fully, and then get tungsten, indium, and tin The composite sol of the composite sol; the obtained composite sol is evenly coated on the transparent conductive oxide glass substrate by dipping or spin-coating technology to form a gel film. ~300°C in an oxygen atmosphere for 1 h, then take it out, and air cool to room temperature to obtain "ITO nanocrystal-WO 3 Amorphous" dual-phase composite thin films.

[0030] The film obtained in this embodiment has an optical modulation contrast ΔT% in the visible light band of 65%; an optical modulation contrast ΔT% in the 1200nm wavelength band is 53%; 100×100mm 2 The color change response time of the film is 1s, and after 2000 times of coloring ...

Embodiment 3

[0032] Preparation of "ITO nanocrystal-WO 3 Amorphous" electrochromic film:

[0033] Take 2g of tungsten chloride, 0.1527g of indium nitrate, and 0.0147g of tin nitrate, and dissolve them in 49.5mL of ethylene glycol methyl ether, add 0.5mL of deionized water to it, and stir at room temperature for 2 hours to fully dissolve to obtain tungsten-containing , indium, and tin composite sol; the resulting composite sol is uniformly coated on a transparent conductive oxide glass substrate by dipping or spin coating technology to form a gel film, dried at 150°C for 10 minutes, and then placed in a heat treatment The furnace was kept in an oxygen atmosphere at 200-300 °C for 1 h, then it was taken out, and air-cooled to room temperature to obtain "ITO nanocrystal-WO 3 Amorphous" dual-phase composite thin films.

[0034] The film obtained in this embodiment has an optical modulation contrast ratio ΔT% in the visible light band of 72%, an optical modulation contrast ratio ΔT% in the 12...

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Abstract

The invention discloses a nanocrystalline enhanced tungsten oxide electrochromic film which is a 'TCO nanocrystalline-WO3 amorphous' biphase composite film prepared by taking transparent conductive oxide (TCO) nanocrystalline and amorphous tungsten oxide as substrates. The invention further discloses a preparation method of the nanocrystalline enhanced tungsten oxide electrochromic film. The nanocrystalline enhancing technology is adopted to improve the electrochromic performance of a traditional tungsten oxide film at the visible light waveband, meanwhile, by virtue of the modulating characteristic of the TCO nanocrystallines at the near infrared waveband, modulation of the tungsten oxide film at the near infrared waveband is realized, and accordingly, the problems in the prior art that the tungsten oxide film is not long enough in cycle life and is low in electrochromic response rate of big-sized materials and lack of near infrared modulation capability are solved.

Description

technical field [0001] The invention belongs to the technical field of inorganic functional materials, and in particular relates to a nanocrystal-reinforced tungsten oxide electrochromic film; the invention also relates to a preparation method of the nanocrystal-reinforced tungsten oxide electrochromic film. Background technique [0002] Tungsten oxide electrochromic film has great application value in the field of building energy-saving glass because of its real-time adjustment of indoor lighting and thermal insulation. It is considered to be the next-generation energy-saving window material to replace Low-e coated glass. [0003] The tungsten oxide electrochromic glass window is mainly composed of five layers including transparent electrodes, tungsten oxide electrochromic films, lithium ion electrolytes, ion storage films, and transparent electrodes. However, the existing tungsten oxide-based electrochromic glass windows have the shortcomings of short cycle life, slow elec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/23
Inventor 任洋赵高扬王秋红高赟
Owner XIAN UNIV OF TECH
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