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A w with electrochromic properties 18 o 49 /wo 3 Composite film and preparation method thereof

A composite film, electrochromic technology, applied in the coating and other directions, can solve the problems of seed crystal thickness, uniformity, and the surface state is not easy to adjust, and achieve the effect of low cost, simple process, and improved bonding force.

Active Publication Date: 2020-06-19
NINGBO GEOSTAR PHOTOELECTRIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Spin-coating is used to prepare the seed layer, which effectively improves the combination of hydrothermal nanostructured tungsten oxide and conductive glass substrate, but the thickness, uniformity, and surface state of the seed crystals prepared by spin-coating are not easy to adjust.

Method used

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  • A w with electrochromic properties <sub>18</sub> o <sub>49</sub> /wo <sub>3</sub> Composite film and preparation method thereof
  • A w with electrochromic properties <sub>18</sub> o <sub>49</sub> /wo <sub>3</sub> Composite film and preparation method thereof
  • A w with electrochromic properties <sub>18</sub> o <sub>49</sub> /wo <sub>3</sub> Composite film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1) Deposit a layer of tungsten oxide on the surface of clean FTO glass by DC magnetron sputtering. The parameters of DC magnetron sputtering are: the background vacuum is lower than 6×10 -4 Pa, room temperature, sputtering power 70W, working pressure 0.6Pa, Ar:O 2 =20:3, sputtering thickness is 36nm; air annealing at 400°C for 30min to form dense WO 3 monoclinic crystal;

[0027] 2) Weigh 0.04g WCl with an electronic balance 6 powder, pour it into the lining of a 50ml hydrothermal kettle and add 30ml of ethanol, stir at room temperature until it is completely dissolved, the solution gradually changes from colorless to brownish yellow, and the configuration of the precursor solution is completed; clean WO 3 / FTO is placed upside down on the support table so that WO 3 Face down, parallel to the liquid surface of the reactant, about 1mm above the liquid surface.

[0028] 3) Put on a stainless steel shell and put it in an oven, react at a constant temperature of 175°C f...

Embodiment 2

[0030] 1) Deposit a tungsten oxide layer on the surface of clean FTO glass by DC magnetron sputtering. The parameters of DC magnetron sputtering are: the background vacuum is lower than 6×10 -4 Pa, room temperature, sputtering power 70W, working pressure 0.6Pa, Ar:O 2 =20:3, the sputtering thickness is 72nm; then annealed in air at 400°C for 30min to form dense WO 3 monoclinic crystal.

[0031] 2) Use a balance to accurately weigh 0.04g WCl 6 powder, pour it into the lining of a 50ml hydrothermal kettle and add 30ml of ethanol, stir at room temperature until it is completely dissolved, the solution gradually changes from colorless to brownish yellow, and the configuration of the precursor solution is completed; clean WO 3 / FTO is placed upside down on the support table so that WO 3 Face down, parallel to the liquid surface of the reactant, about 0.5mm above the liquid surface;

[0032] 3) Put on a stainless steel shell and put it in an oven, react at a constant temperature...

Embodiment 3

[0034] 1) Deposit a layer of tungsten oxide on the surface of clean FTO glass by DC magnetron sputtering method; the parameters of DC magnetron sputtering are: the background vacuum is lower than 6×10 -4 Pa, room temperature, sputtering power 70W, working pressure 0.6Pa, Ar:O 2 =20:3, the sputtering thickness is 144nm, and then annealed at 400°C for 30min in air to form dense WO 3 monoclinic crystal.

[0035] 2) Use a balance to accurately weigh 0.04g WCl 6 powder, pour it into the lining of a 50ml hydrothermal kettle and add 30ml of ethanol, stir at room temperature until it is completely dissolved, the solution gradually changes from colorless to brownish yellow, and the configuration of the precursor solution is completed; clean WO 3 / FTO placed upside down on the support table, WO 3 Face down, parallel to the liquid surface of the reactant, about 3mm above the liquid surface.

[0036] 3) Put on a stainless steel shell and put it in an oven, react at a constant temperat...

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Abstract

The invention discloses a W18O49 / WO3 composite film with electrochromic property; a WO3 layer and a W18O49 layer are sequentially deposited on transparent conductive glass from bottom to top. The invention discloses a preparation method of the composite film. The method comprises the following steps: (1) depositing tungsten oxide on the surface of clean transparent conductive glass by using directcurrent (DC) reactive sputtering method, and annealing to obtain the WO3 layer; (2) placing a precursor solution in a reaction kettle, and placing the transparent conductive glass, deposited with theWO3 layer, in the reaction kettle, wherein the WO3 layer of the transparent conductive glass is 0-3mm higher than the liquid level; (3) after the reaction kettle reacts at a preset temperature for apredetermined time, taking out the reaction kettle to obtain the transparent conductive glass having the W18O49 / WO3 composite film. The dense WO3 makes a great contribution to the service cycle stability of the composite film and provides a transition for realization of the WO3 nanostructure morphology with a larger specific surface area, so that the composite film with a higher color changing efficiency is formed.

Description

technical field [0001] The invention belongs to the technical field of preparation of electrochromic thin films, in particular to a W film with electrochromic properties. 18 o 49 / WO 3 Composite film and method for its preparation. Background technique [0002] In the context of green environmental protection, electrochromic materials and devices have attracted attention due to their application prospects in low-energy display, electronic paper, intelligent energy saving in buildings, and infrared stealth. Tungsten is an advantageous mineral resource in my country, and tungsten trioxide is not only the most well-studied electrochromic material, but also the inorganic electrochromic material with the best performance. Electrochromism refers to the phenomenon that the optical properties of materials undergo stable and reversible changes under the action of an applied electric field. Tungsten trioxide is an n-type semiconductor with a band gap of about 2.4 eV, and has a goo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C17/34
CPCC03C17/3417C03C2217/219C03C2217/241C03C2217/70C03C2218/111C03C2218/154
Inventor 钱旦宋忠孝梁琴李茜李雁淮
Owner NINGBO GEOSTAR PHOTOELECTRIC TECH
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