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A method for preparing a low-cost and environment-friendly tungsten oxide electrochromic film suitable for large-area production

An environmentally friendly, electrochromic technology, applied in the field of electrochromic technology and smart windows, can solve the problems of unfavorable product popularization and high production cost, and achieve the advantages of increasing the contact area, reducing the consumption of raw materials, and improving the electrochromic performance. Effect

Active Publication Date: 2020-09-22
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nowadays, the preparation technology of tungsten oxide electrochromic thin film is relatively mature, but the production cost of methods such as physical vapor deposition is too high, which is not conducive to the popularization of products in the civilian field

Method used

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  • A method for preparing a low-cost and environment-friendly tungsten oxide electrochromic film suitable for large-area production
  • A method for preparing a low-cost and environment-friendly tungsten oxide electrochromic film suitable for large-area production
  • A method for preparing a low-cost and environment-friendly tungsten oxide electrochromic film suitable for large-area production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Ultrasound the FTO glass for 15 minutes in a special FTO cleaning solution, then ultrasonically clean it with deionized water for 15 minutes, and finally clean it with ethanol for 15 minutes, and dry it to obtain a clean FTO glass.

[0034] (2) Take 0.5g tungstic acid, 10ml H 2 o 2 , 20ml of deionized water in a beaker, stirred on a magnetic stirrer at 90°C for 2 hours, until the initial yellow turbid solution became clear and transparent.

[0035] (3) After the tungstic acid is completely dissolved, heat and concentrate the liquid, then add PVP powder, heat and stir at 70°C to dissolve, and prepare a viscous precursor solution with a mass fraction of PVP of 5%.

[0036] (4) Spin-coat the precursor solution on the cleaned FTO conductive glass, first spin it on the spin-coating instrument at a speed of 1500r / min for 10 seconds, then heat it on the heating plate at 240°C for 15 minutes, and repeat the above operation twice after cooling .

[0037] (5) Carbonization...

Embodiment 2

[0040] (1) Ultrasound the FTO glass for 15 minutes in a special FTO cleaning solution, then ultrasonically clean it with deionized water for 15 minutes, and finally clean it with ethanol for 15 minutes, and dry it to obtain a clean FTO glass.

[0041] (2) Take 0.5g tungstic acid, 15ml H 2 o 2 , 15ml of deionized water in a beaker, stirred on a magnetic stirrer at 90 ° C for 2 hours, until the initial yellow turbid solution became clear and transparent.

[0042] (3) After the tungstic acid is completely dissolved, heat and concentrate the resulting liquid, then add PVP white powder, heat and stir at 70°C, and prepare a viscous precursor solution with a mass fraction of PVP of 8%.

[0043] (4) Spin-coat the precursor solution on the cleaned FTO conductive glass, first spin it on the spin-coating instrument at a speed of 1500r / min for 10 seconds, then heat it on the heating plate at 240°C for 15 minutes, and repeat the above operation twice after cooling .

[0044] (5) Carboni...

Embodiment 3

[0047] (1) Ultrasound the FTO glass for 15 minutes in a special FTO cleaning solution, then ultrasonically clean it with deionized water for 15 minutes, and finally clean it with ethanol for 15 minutes, and dry it to obtain a clean FTO glass.

[0048] (2) Take 0.3g tungstic acid, 10ml H 2 o 2 , 20ml of deionized water in a beaker, stirred on a magnetic stirrer at 90°C for 2 hours, until the initial yellow turbid solution became clear and transparent.

[0049] (3) After the tungstic acid is completely dissolved, heat and concentrate the resulting liquid, then add PVP white powder, heat and stir at 80°C, and prepare a viscous precursor solution with a mass fraction of PVP of 12%.

[0050] (4) Spin-coat the precursor solution on the cleaned FTO conductive glass, first spin it on the spin-coating apparatus at a speed of 1500r / min for 10 seconds, and then heat it on a heating plate at 250°C for 15 minutes.

[0051] (5) Carbonization: heat the film obtained in (4) on a heating pla...

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Abstract

A preparation method suitable for large-area production of a low-cost and environment-friendly tungsten oxide electrochromic film comprises the following steps: sequentially putting FTO glass into anFTO cleaning solution, deionized water and an ethanol solution, carrying out ultrasonic cleaning for 15 min, then taking the FTO glass out, and drying in the air; dissolving tungsten acid in hydrogenperoxide with a certain mass fraction, stirring uniformly, and adding PVP powder, to obtain a precursor; 1) carrying out spin coating on the FTO by a precursor solution, and drying at the temperatureof 100-280 DEG C to form a film; 2) carrying out blade coating on the FTO by the precursor solution, and drying to form a film in an environment of 60-180 DEG C; placing the prepared film on a heatingplate, carbonizing, to obtain a black film sample, then carrying out heat treatment in a muffle furnace, carrying out heat preservation for 2-4 h, and thus obtaining a porous tungsten oxide film. Theutilization rate of raw materials for preparing the tungsten oxide electrochromic film is increased, and the process is green and environmentally friendly and suitable for large-area production.

Description

technical field [0001] The invention relates to the fields of electrochromic technology and smart window technology, in particular to a method for preparing a low-cost and environment-friendly tungsten oxide electrochromic thin film suitable for large-area production. Background technique [0002] Electrochromism is a process in which the color and transmittance of materials undergo reversible changes under the control of low voltage. At present, electrochromic technology is widely used in color-changing glass, car rearview mirror and smart display. The most important thing in the structure of electrochromic devices is the electrochromic film, whose performance directly determines the quality of the entire product. Therefore, how to make an electrochromic film with excellent color-changing performance is particularly important. [0003] Electrochromic glass is widely used in smart buildings. Electrochromic smart windows have the ability to adjust light absorption and trans...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C17/34
CPCC03C17/006C03C17/3417C03C2217/425C03C2217/70C03C2217/94C03C2218/114C03C2218/116
Inventor 方华靖周立君魏朋武文婷汪宏
Owner XI AN JIAOTONG UNIV
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