Electrochromic thin film with long lifetime and selective regulation of light and heat and its preparation method

A selective, electrochromic technology, applied in the field of electrochromic thin film, electrochromic thin film preparation, can solve the problems of lack of selective control of light and heat, short life of commercial tungsten oxide thin film, etc., to achieve localized surface Significant plasmon resonance coupling effect, strong near-infrared electrochromic ability, and strong chemical stability

Inactive Publication Date: 2021-01-15
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide an electrochromic thin film with long service life and selective control of light and heat, which can effectively solve the problems of short life of commercial tungsten oxide films and lack of selective control of light and heat

Method used

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  • Electrochromic thin film with long lifetime and selective regulation of light and heat and its preparation method
  • Electrochromic thin film with long lifetime and selective regulation of light and heat and its preparation method

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preparation example Construction

[0033] The present invention also provides a method for preparing an electrochromic thin film with long service life and selective regulation of light and heat. The specific steps are as follows:

[0034] Step 1: Mix benzoylacetone and absolute ethanol, stir at room temperature until it dissolves to obtain solution A; mix di-n-butyltin oxide with solution A, and stir at 60°C for 2 hours under a dry nitrogen atmosphere to obtain Pale yellow sol B; mix a certain amount of polyethylene glycol 400 and trifluoroacetic acid into sol B, and stir for 1 hour under a dry nitrogen atmosphere at 45°C to obtain light yellow FTO photosensitive sol C;

[0035] In step 1, the molar ratio of di-n-butyltin oxide, benzoylacetone, trifluoroacetic acid, polyethylene glycol 400, and absolute ethanol is 1:0.5:0.167:0.02:20;

[0036] Step 2: Apply sol C on a transparent conductive coated glass substrate by spin coating method, and dry it in a vacuum oven at 80°C for 10 minutes to form an FTO photosen...

Embodiment 1

[0049] A long-life electrochromic film that can selectively control light and heat is an amorphous WO with FTO nanoarray embedded 3 Composite film, in which the array is a regular array of holes, amorphous WO 3 The film fills the round holes of the FTO nanohole array and is higher than the depth of the round holes. The depth of the FTO hole array is 60nm, the period is 200nm, the diameter of the circular hole is 100nm, and the amorphous WO 3 The film thickness is 300 nm.

[0050] The preparation method of the composite film with the above structural parameters, the specific steps are as follows:

[0051] Mix 0.81g of benzoylacetone with 9.22g of absolute ethanol, stir at room temperature until it dissolves, then transfer it to a three-necked flask equipped with a dry nitrogen device, add 2.49g of di-n-butyl Tin oxide, heated and stirred at 60°C for 2 hours, cooled naturally to 45°C, added 0.19g of trifluoroacetic acid and 0.08g of polyethylene glycol 400, and continued to s...

Embodiment 2

[0056] A long-life electrochromic film that can selectively control light and heat is an amorphous WO with FTO nanoarray embedded 3 Composite film, in which the array is a regular array of holes, amorphous WO 3 The film fills the round holes of the FTO nanohole array and is higher than the depth of the round holes. The depth of the FTO hole array is 30nm, the period is 200nm, the diameter of the circular hole is 100nm, and the thickness of the amorphous film is 200nm.

[0057] The preparation method of the composite film with the above structural parameters, the specific steps are as follows:

[0058] Mix 0.81g of benzoylacetone with 9.22g of absolute ethanol, stir at room temperature until it dissolves, then transfer it to a three-necked flask equipped with a dry nitrogen device, add 2.49g of di-n-butyl Tin oxide, heated and stirred at 60°C for 2 hours, cooled naturally to 45°C, added 0.19g of trifluoroacetic acid and 0.08g of polyethylene glycol 400, and continued to stir ...

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Abstract

The invention discloses a long-service-life electrochromic film capable of selectively regulating and controlling light and heat. Transparent conductive coated glass is used as a substrate, and an FTOnano hole array film and an amorphous WO3 film are sequentially prepared on the substrate to form an embedded amorphous WO3 composite film having an FTO nano array, wherein the array is a regularly-arranged hole array, and the amorphous WO3 film is filled in a circular hole of the FTO nano hole array film and higher than a depth of the circular hole of the FTO nano hole array film. A preparationmethod of the film comprises the following steps: preparing the FTO nano hole array by utilizing laser interference combined with a photosensitive sol-gel technique, and filling an amorphous WO3 matrix on the hole array by utilizing an a sol-gel technique to form the composite film. The composite film disclosed by the invention can maintain a more excellent selective modulation effect on the lightand the heat after 100,000 electrochromic cycles due to ultra-strong chemical stability of FTO; and the preparation method of the film has the characteristics that the process is controllable and thelarge-area film is easy to form, and is suitable for industrialized mass production.

Description

technical field [0001] The invention belongs to the technical field of photoelectric functional films, and in particular relates to a long-life electrochromic film which can selectively regulate light and heat; the invention also relates to a preparation method of the long-life electrochromic film which can selectively regulate light and heat . Background technique [0002] Electrochromic film refers to a new type of intelligent material that can reversibly change between the colored state of low transmittance and the faded state of high transmittance under the action of alternating high and low or positive and negative external electric fields. It is an energy-saving smart window. core part. At present, the commercial electrochromic film is mainly amorphous tungsten oxide film. By adjusting the transmittance of the film in the near-infrared band, the heat penetrating the film can be controlled to achieve the purpose of energy saving. However, while this film obtains lower...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C17/34
CPCC03C17/3411
Inventor 任洋周晓歌赵高扬
Owner XIAN UNIV OF TECH
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