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A kind of inorganic salt electrochromic thin film and its preparation method and application

An electrochromic, inorganic salt technology, applied in the direction of instruments, nonlinear optics, optics, etc., can solve the problems of limitations, high energy consumption, and inapplicability of flexible substrates, and achieve the effect of protecting high temperature burns

Active Publication Date: 2021-06-08
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problems caused by high temperature annealing are: 1) high energy consumption; 2) not suitable for general flexible substrates, such as PET, PEN, etc.
These problems limit the application of sol-gel technology in flexible electrochromic devices

Method used

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  • A kind of inorganic salt electrochromic thin film and its preparation method and application
  • A kind of inorganic salt electrochromic thin film and its preparation method and application
  • A kind of inorganic salt electrochromic thin film and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Mix ammonium metatungstate, conductive silver nanoparticles, deionized water, and PVA in a certain proportion to prepare a precursor solution. The concentration of ammonium metatungstate in the solution is 1mol / L, and the diameter of conductive silver nanoparticles is 30 nm. The resistivity of deionized water is 15MΩ m, the mass ratio of conductive silver nanoparticles to tungsten element (W) in the film is 1.5:400, and the mass ratio of crystallization inhibitor PVA to tungsten element (W) in the film is 1:73 .

[0035] (2) Prepare the precursor solution obtained in step 1 to form a film on the conductive flexible substrate by inkjet printing process. The printing process parameters are as follows: the distance between the nozzle and the substrate is 3mm, the voltage of the piezoelectric ceramic is 35V, and the substrate temperature is 25 °C, the inkjet interval is 10 μm, the area of ​​the film printed in Example 1 is 1 cm×1 cm, and the thickness of the film prepar...

Embodiment 2

[0041] It is basically the same as steps (1) to (4) of Example 1, except that in step (1): the concentration of ammonium metatungstate is 0.7 mol / L, and the crystallization inhibitor is PEO. The film prepared by printing in Example 2 has an area of ​​1 cm×1 cm and a thickness of 55.4 nm. Inorganic salt (NH 4 ) x W y o (6y+x) / 2 ·nH2 In O x / y=0.39, n=0.4.

[0042] In the LiClO of 1mol / L the gained film of embodiment 2 4 The electrochromic test was carried out in / PC electrolyte, and the driving voltage was ±1.5V. The initial state transmittance and faded state transmittance of the film are about 85% (@600nm), the colored state transmittance is about 38% (@600nm), and the optical modulation ability reaches 47% (@600nm).

Embodiment 3

[0044] It is basically the same as steps (1), (3)-(4) of Example 1, except that step (2): the precursor solution obtained in step 1 is prepared into a film by inkjet printing process, and the printing process parameters are as follows: nozzle The distance to the substrate is 1mm, the voltage of the piezoelectric ceramic is 40V, the temperature of the substrate is 25°C, and the inkjet interval is 10μm. The area of ​​the film printed in Example 3 is 1cm×1cm. The thickness is 75.2nm. Inorganic salt (NH 4 ) x W y o (6y+x) / 2 ·nH 2 In O x / y=0.49, n=3.5.

[0045] In the LiClO of 1mol / L the gained film of embodiment 3 4 The electrochromic test was carried out in / PC electrolyte, and the driving voltage was ±1.5V. The initial state transmittance and faded state transmittance of the film are about 79% (@600nm), the colored state transmittance is about 25% (@600nm), and the optical modulation ability reaches 54% (@600nm).

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Abstract

The invention discloses an inorganic salt electrochromic thin film, a preparation method and application thereof. The composition of the inorganic salt electrochromic film is: (NH 4 ) x W y o (6y+x) / 2 ·nH 2 O, conductive nanoparticles and crystallization inhibitors, 0.3

Description

technical field [0001] The invention belongs to the technical field of electrochromism, and in particular relates to an inorganic salt electrochromic thin film and a preparation method and application thereof. Background technique [0002] Electrochromic thin film is the core functional layer of electrochromic devices. Flexible electrochromic devices are currently a development direction recognized by industry and academia. In the existing technology, the methods for preparing flexible electrochromic films mainly include sol-gel method, vacuum method and so on. Vacuum method is a commonly used commercial method for preparing flexible electrochromic films, but the preparation of large-area electrochromic devices by vacuum method requires high equipment requirements, which leads to the high cost of preparing electrochromic films by vacuum method. The market popularization of electrochromic devices is limited. The sol-gel method is a low-cost thin film preparation technology...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/1523
CPCG02F1/1523
Inventor 宁洪龙张观广姚日晖史沐杨梁志豪符晓陈俊龙杨跃鑫钟锦耀彭俊彪
Owner SOUTH CHINA UNIV OF TECH
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