Flexible electrochromic oxide film, flexible electrochromic oxide device and preparation method of flexible electrochromic oxide film

An oxide thin film, electrochromic technology, applied in the direction of instruments, nonlinear optics, optics, etc., can solve the problems of thick electrochromic film and poor electrochromic performance, achieve strong adhesion, not easy to fall off, and beneficial to Effects of Osmosis and Ion Diffusion

Inactive Publication Date: 2019-11-22
NANJING UNIV OF POSTS & TELECOMM
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  • Application Information

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Problems solved by technology

The preparation process of this method is simple, the cost is low, overcomes the difficult problem that the electrochromic powder particles are not easy to form a film, and is applicable to all electrochromic powder particles, but the electrochromic film prepared by this method is relatively thick and has relatively low electrochromic performance. Difference

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  • Flexible electrochromic oxide film, flexible electrochromic oxide device and preparation method of flexible electrochromic oxide film
  • Flexible electrochromic oxide film, flexible electrochromic oxide device and preparation method of flexible electrochromic oxide film
  • Flexible electrochromic oxide film, flexible electrochromic oxide device and preparation method of flexible electrochromic oxide film

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[0039]A preparation method of a flexible electrochromic oxide thin film and a device of the present invention, firstly isolate a plurality of regions on a flexible substrate, and then use ultraviolet light and ozone generated by ultraviolet light to convert transition metal precursors into non-crystalline Based on the principle of transition metal oxides, one or more transition metal oxide films are prepared in different isolation regions, and finally packaged with a flexible counter electrode to form an electrochromic device. Specifically include the following steps:

[0040] (1) Multiple independent regions are isolated on the flexible substrate;

[0041] Among them, the flexible substrate is preferably PET conductive film, PI conductive film, silver-based transparent conductive film, graphene-based transparent conductive film, but not limited thereto;

[0042] Among them, the way of isolating multiple independent regions on the flexible substrate is: the material used for ...

Embodiment 1

[0057] First, the PET flexible substrate with a size of 2×4 cm was ultrasonically cleaned with acetone, absolute ethanol, and deionized water for 10 minutes to remove dust, organic matter and other stains on the surface. Then, the flexible substrate is isolated into two independent regions by using PET, and the material used for isolating the independent regions is adhered to the flexible substrate through an epoxy resin adhesive.

[0058] Prepare a tungsten hexachloride precursor solution with a concentration of 0.25M, weigh 0.4g of tungsten hexachloride powder and dissolve it in 40mL of absolute ethanol, and magnetically stir for 2 hours at room temperature to obtain a uniform dark blue precursor solution.

[0059] The tungsten hexachloride precursor solution was drop-coated in two areas separated by PET, and then transferred to a UV light box with a wavelength of 185-254nm, and irradiated by ultraviolet light deposition for 5 minutes. Alternately repeat the steps of drop co...

Embodiment 2

[0063] First, the PET flexible substrate with a size of 2×4 cm was ultrasonically cleaned with acetone, absolute ethanol, and deionized water for 10 minutes to remove dust, organic matter and other stains on the surface. Then, the flexible substrate is isolated into four independent regions by using PET, and the material used for isolating the independent regions is adhered to the flexible substrate through an epoxy resin adhesive.

[0064] Prepare a tungsten hexachloride precursor solution with a concentration of 0.25M, weigh 0.4g of tungsten hexachloride powder and dissolve it in 40mL of absolute ethanol, and magnetically stir for 2 hours at room temperature to obtain a uniform dark blue precursor solution.

[0065] The tungsten hexachloride precursor was drop-coated in four areas separated by PET, and then transferred to a UV light box with a wavelength of 185-254nm, and irradiated by UV light deposition for 10 minutes. Alternately repeat the steps of drip coating and UV li...

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Abstract

The invention discloses a flexible electrochromic oxide film, a flexible electrochromic oxide device and a preparation method of the flexible electrochromic oxide film. The preparation method of the flexible electrochromic oxide film comprises steps that (1), a plurality of independent areas are isolated on a flexible substrate; (2), halide powder is dissolved in solvent to prepare electrochromicoxide precursor solution, and electrochromic oxide precursor solutions with different concentrations and different types are prepared; (3), one or more electrochromic oxide precursor solutions obtained in the step (2) are dispensed into one or more independent areas isolated in the step (1), then photochemical deposition is performed in an ultraviolet lamp box, and photochemical deposition is repeated for several times; and (4), heat treatment of an oxide film electrode obtained in the step (3) is performed to obtain the flexible electrochromic oxide film. The flexible electrochromic oxide film preparation method has a certain prospect in popularization and application of large-area flexible electrochromic devices.

Description

technical field [0001] The invention belongs to the technical field of thin film materials and functional devices, and in particular relates to a preparation method of a flexible electrochromic oxide thin film and a device thereof. Background technique [0002] The so-called electrochromism refers to the phenomenon that the optical properties such as absorption coefficient, reflectivity, and transmittance of material materials undergo reversible color changes under the action of an external electric field. The basic principle is that under the action of an external electric field, redox reactions occur through the injection or extraction of charges (ions or electrons), which changes the apparent color and transparency of the material. Materials with such characteristics are collectively referred to as electrochromic materials, which are usually divided into two categories, namely organic electrochromic materials and inorganic electrochromic materials. Devices made of electro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1524G02F1/15G02F1/153
CPCG02F1/15G02F1/153G02F1/1524
Inventor 魏昂刘羽泽位威张倩
Owner NANJING UNIV OF POSTS & TELECOMM
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