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Tungsten oxide electrochromic thin film with high spectral adjustment range and preparation method thereof

An electrochromic and adjustable range technology, applied in coating and other directions, can solve problems such as increased production cost, waste of raw materials, precipitation, etc., and achieves the effects of low cost, large spectral adjustment range and simple preparation process

Active Publication Date: 2019-12-03
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Compared with the above various microstructures, WCl 6 As W source, W was prepared by hydrothermal reaction 18 o 49 There are many reports on the use of thin films in electrochromic materials, photoanodes, etc., but it is known that the preparation method generally increases the concentration of the product W by increasing the initial W source concentration. 18 o 49 The film thickness and density of the film, but a large amount of precipitation will be precipitated in the solution, resulting in a great waste of raw materials, and WCl 6 More expensive, which will inevitably lead to a substantial increase in production costs

Method used

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  • Tungsten oxide electrochromic thin film with high spectral adjustment range and preparation method thereof
  • Tungsten oxide electrochromic thin film with high spectral adjustment range and preparation method thereof
  • Tungsten oxide electrochromic thin film with high spectral adjustment range and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Preparation W 18 o 49 method, the steps are as follows:

[0037] (1) Clean the FTO glass sheet with acetone, isopropanol, ethanol;

[0038](2) Dissolve 0.5g oxalic acid in 30ml ethanol, stir for 10min to obtain a clear solution;

[0039] (3) Add 0.1g WCl 6 Dissolve in the clear solution and stir for 20 minutes to obtain a transparent yellow precursor solution;

[0040] (4) Put the cleaned FTO glass sheet vertically into the reaction kettle, add the precursor solution filtered through a 0.22 μm organic membrane and cover the glass sheet, and obtain W after solvothermal reaction at 180°C for 10 hours. 18 o 49 - FTO glass samples;

[0041] (5) will W 18 o 49 -FTO glass samples were washed with ethanol and water successively, dried at 60°C, and heat-treated at 200°C for 1h to enhance W 18 o 49 Contact with the FTO substrate.

[0042] The electrochromic test was carried out on CHI 600D electrochemical workstation and Cary 5000 UV-visible spectrophotometer, W 18 o...

Embodiment 2

[0044] Preparation W 18 o 49 method, the steps are as follows:

[0045] (1) Clean the FTO glass sheet with acetone, isopropanol, ethanol;

[0046] (2) Dissolve 1.0 g of oxalic acid in 30 ml of ethanol, stir for 10 min to obtain a clear solution;

[0047] (3) Add 0.1g WCl 6 Dissolve in the clear solution and stir for 20 minutes to obtain a transparent yellow precursor solution;

[0048] (4) Put the cleaned FTO glass sheet vertically into the reaction kettle, add the precursor solution filtered through a 0.22 μm organic membrane and cover the glass sheet, and obtain W after solvothermal reaction at 180°C for 10 hours. 18 o 49 - FTO glass samples;

[0049] (5) will W 18 o 49 -FTO glass samples were washed with ethanol and water successively, dried at 60°C, and heat-treated at 200°C for 1h to enhance W 18 o 49 Contact with the FTO substrate.

[0050] Scrape a small amount of W from the substrate 18 o 49 Powder, after testing, the X-ray diffraction pattern is as follow...

Embodiment 3

[0052] Preparation W 18 o 49 method, the steps are as follows:

[0053] (1) Clean the FTO glass sheet with acetone, isopropanol, ethanol;

[0054] (2) Dissolve 0.5g oxalic acid in 30ml ethanol, stir for 10min to obtain a clear solution;

[0055] (3) Add 0.2gWCl 6 Dissolve in the clear solution and stir for 20 minutes to obtain a transparent yellow precursor solution;

[0056] (4) Put the cleaned FTO glass sheet vertically into the reaction kettle, add the precursor solution filtered through a 0.22 μm organic membrane and cover the glass sheet, and obtain W after solvothermal reaction at 180°C for 10 hours. 18 o 49 - FTO glass samples;

[0057] (5) will W 18 o 49 -FTO glass samples were washed with ethanol and water successively, dried at 60°C, and heat-treated at 200°C for 1h to enhance W 18 o 49 Contact with the FTO substrate.

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Abstract

The invention discloses a preparation method of a tungsten oxide electrochromic film with a high spectral adjustment range. The method includes: adopting tungsten hexachloride and oxalic acid as the raw materials to prepare a precursor solution, and then carrying out solvothermal reaction to obtain the product. In the precursor solution, the concentration of tungsten hexachloride is 1-15g / L. According to the preparation method of the tungsten oxide electrochromic film with a high spectral adjustment range provided by the invention, oxalic acid is introduced as a structural adjustment agent toincrease the adhesion amount of the tungsten oxide electrochromic film on a conductive substrate under a low W source concentration, thus effectively enhancing the spectral adjustment range and increasing the raw material utilization. The preparation method is simple, is low in cost, and is safe and reliable.

Description

technical field [0001] The invention relates to the field of electrochromic materials and their preparation, in particular to a tungsten oxide electrochromic film with a high spectral adjustment range and a preparation method thereof. Background technique [0002] Electrochromism refers to the phenomenon that the optical properties of materials undergo reversible changes under the action of an external electric field. It can be applied to building smart windows, automotive anti-glare rearview mirrors, display equipment and other fields. W 18 o 49 As a non-stoichiometric tungsten oxide compound that can exist stably, a variety of microstructures can be controlled and synthesized through various wet chemical methods, and it shows excellent performance in many fields such as electrochromism and sensors, and has won the favor of researchers. . [0003] Take WCl 6 Preparation of various structures of W for W source 18 o 49 There are many reports, such as a Chinese patent do...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C17/34
CPCC03C17/3417C03C2217/94C03C2217/948C03C2218/111
Inventor 赵高凌谢君樑韩高荣
Owner ZHEJIANG UNIV
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