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A large-area patterned solid-state electrochromic film and its preparation method and application

An electrochromic and electrochromic layer technology, which can be applied to instruments, nonlinear optics, optics, etc., can solve the problems of difficult packaging, leakage of packaging, etc., and achieve the effects of simple preparation process, low cost, and low equipment cost.

Active Publication Date: 2021-10-26
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a large-area patterned solid-state electrochromic film and its preparation method and application, so as to solve the problems of leakage and difficult packaging of large-area electrochromic device packages in the prior art

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  • A large-area patterned solid-state electrochromic film and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] In this embodiment, a large-area patterned solid-state electrochromic film is prepared based on screen printing, and its preparation method includes the following steps:

[0030] Step 1, substrate cleaning: ultrasonically clean ITO / FTO in acetone, absolute ethanol, and deionized water for 20 minutes respectively to remove dust, organic matter and other stains on the surface. After washing, dry naturally and set aside;

[0031] Step 2, prepare tungsten oxide precursor solution: Dissolve 3g of sodium tungstate dihydrate in 45mL of deionized water, add hydrochloric acid dropwise until no precipitation is formed, perform centrifugation and washing, set the speed at 6000rpm for 15min, repeat centrifugation, Wash treatment three times. Add 6 mL of hydrogen peroxide dropwise to the precipitate obtained after centrifugation, and heat in a water bath at 60°C to obtain a tungsten oxide precursor solution. Put the precursor solution into a hydrothermal kettle and heat at 180°C for...

Embodiment 2

[0038] In this embodiment, a large-area patterned solid electrochromic thin film of tungsten oxide is prepared based on screen printing, and its preparation method includes the following steps:

[0039] Step 1, substrate cleaning: ultrasonically clean ITO / FTO in acetone, absolute ethanol, and deionized water for 20 minutes respectively to remove dust, organic matter and other stains on the surface. After washing, dry naturally and set aside;

[0040] Step 2, prepare tungsten oxide precursor solution: dissolve 3g sodium tungstate dihydrate in 45mL deionized water, add hydrochloric acid dropwise until no precipitation is formed, perform centrifugation and washing treatment, set the speed at 5000rpm for 15min, repeat centrifugation, Wash treatment three times. Add 6 mL of hydrogen peroxide dropwise to the precipitate obtained after centrifugation, and heat it in a water bath at 60°C to obtain a tungsten oxide precursor solution. Put the precursor solution into a hydrothermal kett...

Embodiment 3

[0047] In this embodiment, a large-area patterned solid electrochromic thin film of tungsten oxide is prepared based on screen printing, and its preparation method includes the following steps:

[0048] Step 1, substrate cleaning: ultrasonically clean ITO / FTO in acetone, absolute ethanol, and deionized water for 20 minutes respectively to remove dust, organic matter and other stains on the surface. After washing, dry naturally and set aside;

[0049] Step 2, prepare tungsten oxide precursor solution: Dissolve 4g of sodium tungstate dihydrate in 60mL of deionized water, add hydrochloric acid dropwise until no precipitation is formed, perform centrifugation and washing, set the speed at 6000rpm for 10min, repeat centrifugation, Wash treatment three times. Add 8 mL of hydrogen peroxide dropwise to the precipitate obtained after centrifugation, and heat in a water bath at 60°C to obtain a tungsten oxide precursor solution. Put the precursor solution into a hydrothermal kettle and ...

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Abstract

The invention discloses a large-area patterned solid-state electrochromic film, a preparation method and application thereof. The present invention uses screen printing method to print the prepared color-changing material and solid electrolyte on the transparent flexible substrate, adopts the method of layer-by-layer printing of the color-changing layer and the solid electrolyte conductive layer to ensure that the color-changing layer and the conductive layer are completely overlapped, and is used in the blank area of ​​the substrate. Transparent adhesive for encapsulation. The invention can realize large-area and patterned effects, has simple preparation process and low cost, and provides a possible preparation method for industrial production of large-area solid-state electrochromic devices.

Description

technical field [0001] The invention belongs to the technical field of electrochromism, in particular to a method for preparing a large-area patterned solid electrochromic film by screen printing, and the method is applicable to all electrochromic materials. Background technique [0002] Electrochromism (EC) refers to the phenomenon that a material undergoes a reversible color change process under the action of an external electric field. Due to the advantages of low energy consumption, fast response, multiple colors, and high contrast, electrochromic technology has shown broad application prospects in information display fields such as electronic paper, monitors, and smart windows. Electrochromic materials mainly include small organic molecules, organic polymers, and inorganic non-metallic oxides. Electrochromic materials and electrochromic devices have the characteristics of changing color by applying a small voltage, rich colors, and low energy consumption, and have attr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/1506G02F1/153G02F1/161
CPCG02F1/1508G02F1/153G02F1/161
Inventor 魏昂刘羽泽位威田灿灿
Owner NANJING UNIV OF POSTS & TELECOMM