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Electrochromic film adopting amorphous/crystalline tungsten trioxide core-shell structure and preparation method of film

A tungsten trioxide and electrochromic technology, applied in the field of amorphous/crystalline tungsten trioxide core-shell structure electrochromic film and its preparation, can solve the problems of slow discoloration speed, low coloring efficiency and poor cycle performance , to achieve the effects of low manufacturing cost, high coloring efficiency and long cycle life

Inactive Publication Date: 2015-11-18
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are some defects in these methods, for example, the prepared film is amorphous, the coloring speed is fast, but the cycle performance is poor or the prepared film is crystalline, the cycle performance is good, but the discoloration speed is slow, and the coloring efficiency is low

Method used

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  • Electrochromic film adopting amorphous/crystalline tungsten trioxide core-shell structure and preparation method of film
  • Electrochromic film adopting amorphous/crystalline tungsten trioxide core-shell structure and preparation method of film
  • Electrochromic film adopting amorphous/crystalline tungsten trioxide core-shell structure and preparation method of film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) Clean the FTO conductive glass (Shenzhen Disprey Photoelectric Material Co., Ltd., Rs≤10ohmTr>85%) with acetone, deionized water and ethanol for 10 minutes, and blow it with nitrogen to obtain a clean FTO conductive glass. Glass;

[0044] (2) Drop excess concentrated hydrochloric acid (10mol / L) into 1mol / L sodium tungstate aqueous solution until no new precipitates are produced, wash the precipitates with deionized water, and obtain milky white to pale yellow colloidal precipitates after washing. To obtain white tungstic acid, dissolve the obtained white tungstic acid in hydrogen peroxide aqueous solution with a mass percentage of hydrogen peroxide of 30%, the molar ratio of white tungstic acid to hydrogen peroxide in aqueous hydrogen peroxide solution is 1:3, add Ionized water was prepared into peroxide tungstic acid solution containing tungsten at a concentration of 3mol / L, and refrigerated at 4°C for later use;

[0045] (3) Spin-coat the peroxide tungstic acid s...

Embodiment 2

[0056] (1) Clean the FTO conductive glass (Shenzhen Disprey Photoelectric Material Co., Ltd., Rs≤10ohmTr>85%) with acetone, deionized water and ethanol for 10 minutes, and blow it with nitrogen to obtain a clean FTO conductive glass. Glass;

[0057] (2) Drop excess concentrated hydrochloric acid (10mol / L) into 1mol / L sodium tungstate aqueous solution until no new precipitates are produced, wash the precipitates with deionized water, and obtain milky white to pale yellow colloidal precipitates after washing. To obtain white tungstic acid, dissolve the obtained white tungstic acid in hydrogen peroxide aqueous solution with a mass percentage of hydrogen peroxide of 30%, the molar ratio of white tungstic acid to hydrogen peroxide in aqueous hydrogen peroxide solution is 1:3, add Ionized water was prepared into peroxide tungstic acid solution containing tungsten at a concentration of 3mol / L, and refrigerated at 4°C for later use;

[0058] (3) Spin-coat the peroxide tungstic acid s...

Embodiment 3

[0069] (1) Clean the FTO conductive glass (Shenzhen Disprey Photoelectric Material Co., Ltd., Rs≤10ohmTr>85%) with acetone, deionized water and ethanol for 10 minutes, and blow it with nitrogen to obtain a clean FTO conductive glass. Glass;

[0070] (2) Drop excess concentrated hydrochloric acid (10mol / L) into 1mol / L sodium tungstate aqueous solution until no new precipitates are produced, wash the precipitates with deionized water, and obtain milky white to pale yellow colloidal precipitates after washing. To obtain white tungstic acid, dissolve the obtained white tungstic acid in hydrogen peroxide aqueous solution with a mass percentage of hydrogen peroxide of 30%, the molar ratio of white tungstic acid to hydrogen peroxide in aqueous hydrogen peroxide solution is 1:3, add Ionized water was prepared into peroxide tungstic acid solution containing tungsten at a concentration of 3mol / L, and refrigerated at 4°C for later use;

[0071] (3) Spin-coat the peroxide tungstic acid s...

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Abstract

The invention discloses an electrochromic film adopting an amorphous / crystalline tungsten trioxide core-shell structure and a preparation method of the film. The method comprises steps as follows: white tungstic acid is dissolved in a hydrogen peroxide solution, the mixture is applied to a conductive surface of a conductive substrate, and a conductive substrate covered with a crystal seed layer is obtained; a tungsten source is dissolved in water, the pH value is adjusted, ammonium sulfate is added, a precursor solution is formed, a reaction is conducted in the precursor solution at the temperature of 150-250 DEG C for 4-10 h, and a tungsten trioxide nanowire array film is obtained. The tungsten source is dissolved in the water, the hydrogen peroxide is dropwise added, the pH value is adjusted, an electrodeposition solution is formed, and the film can be obtained through electrodeposition of amorphous tungsten oxide with a constant voltage method. The film prepared with the preparation method has the nanowire core-shell coating morphology, is good in electric connectivity and has the advantages of large spectrum adjusting range, high coloration efficiency and long cycle life, meanwhile, the preparation technology is convenient to control, the production cost is lower, massive production can be realized, and industrialization is easy to realize.

Description

technical field [0001] The invention relates to the field of material preparation, in particular to an electrochromic film with an amorphous / crystalline tungsten trioxide core-shell structure and a preparation method thereof. Background technique [0002] Electrochromics (EC) refers to the phenomenon that the optical properties of materials undergo reversible changes under the action of an external electric field. Electrochromism only needs a small voltage (about 2V) to work, and it can keep the original coloring or fading state unchanged in the open circuit state, so it consumes less energy. Electrochromic devices (Electrochromic devices, ECD) are expected to be used in building energy-saving windows, automotive anti-glare rearview mirrors, display equipment, variable transmittance glasses, automotive sunroofs, and surface temperature control of spacecraft. Electrochromic materials are mainly divided into three types, namely, inorganic electrochromic materials (generally t...

Claims

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Application Information

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IPC IPC(8): C03C17/34
Inventor 涂江平周鼎王秀丽夏新辉谷长栋
Owner ZHEJIANG UNIV
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