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Method for transferring silver nanowire transparent conductive film to flexible substrate

A technology of transparent conductive film and silver nanowires, which can be used in the manufacture of conductive/semiconductive layers of equipment, circuits, electrical components, etc. Sensor sensitivity and other issues, the transfer method is simple and easy to operate, low in cost, and the effect of reducing surface roughness

Inactive Publication Date: 2017-08-18
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method currently used is mainly to directly coat PDMS on the silver nanowire transparent conductive film to prepare the AgNWs-PDMS composite electrode and then peel it off. However, the electrode has a large square resistance and low conductivity, which directly affects the sensitivity of the sensor, so it cannot meet the requirements. Practical needs
The reason for these problems is that the adhesion between the silver nanowires on the transparent conductive film is weak, and the second is that the physical and chemical interactions between PDMS and the silver nanowires are very weak due to methyl end capping. Enables partial transfer of conductive networks

Method used

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  • Method for transferring silver nanowire transparent conductive film to flexible substrate
  • Method for transferring silver nanowire transparent conductive film to flexible substrate
  • Method for transferring silver nanowire transparent conductive film to flexible substrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] See attached figure 1 , the present invention comprises the following steps:

[0033] (1) Preparation of silver nanowire transparent conductive film:

[0034] Add the silver nanowire absolute ethanol dispersion onto a clean glass substrate, spin-coat at a speed of 1200 rpm, deposit a layer of silver nanowire network substrate with a certain arrangement density, and then coat the silver nanowire The glass substrate of the transparent conductive film was placed on a heating plate at 120°C for 10 minutes to obtain a transparent conductive film of silver nanowires. The transmittance at 550nm wavelength was measured to be 81.7% at this time with a UV-visible spectrophotometer. The square resistance measured by the needle is 11.35Ω sq. -1 .

[0035] (2) Preparation of silica airgel / AgNWs composite conductive film:

[0036] Gas-phase nano silicon dioxide is dispersed in 12ml dehydrated alcohol solution with the massfraction of 4ωt%, on the silver nanowire transparent condu...

Embodiment 2

[0039] Embodiment 2: see attached figure 1 , the present invention comprises the following steps:

[0040] (1) Add the silver nanowire absolute ethanol dispersion onto a clean glass substrate, spin-coat at a speed of 1200 rpm, deposit 2 layers of silver nanowire network substrates with a certain arrangement density, and then coat the The glass substrate of the silver nanowire transparent conductive film was placed on a heating plate at 120° C. for 10 minutes to obtain the silver nanowire transparent conductive film. The transmittance at the wavelength of 550 nm was 74.38% when measured by a UV-visible spectrophotometer. The square resistance measured by four probes is 5.67Ω sq. -1 , due to the increase in the number of nanowire depositions and the increase in the silver nanowire network, the transmittance is lower than that in Example 1, while the conductivity is increased.

[0041] (2) gas-phase nano silicon dioxide is dispersed in 12ml dehydrated ethanol solution with the ...

Embodiment 3

[0043] Embodiment 3: see attached figure 1 , the present invention comprises the following steps:

[0044] (1) Add the silver nanowire absolute ethanol dispersion onto a clean glass substrate, spin-coat at a speed of 1200 rpm, deposit 3 layers of silver nanowire network substrates with a certain arrangement density, and then coat the The glass substrate of the silver nanowire transparent conductive film was placed on a heating plate at 120° C. for 10 minutes to obtain the silver nanowire transparent conductive film. The transmittance at 550nm wavelength was 64.96% when measured by a UV-visible spectrophotometer. The square resistance measured by four probes is 2.44Ω sq. -1 , due to the increase in the number of nanowire depositions and the increase in the silver nanowire network, the transmittance is lower than that of Example 2, while the conductivity is increased.

[0045] (2) gas-phase nano silicon dioxide is dispersed in 12ml dehydrated ethanol solution with the mass fra...

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Abstract

The present invention provides a method for transferring a silver nanowire transparent conductive film to a flexible substrate. The method comprises the following steps: (1) performing spin coating of silver nanowire dispersion liquid on a cleaning substrate, obtaining a silver nanowire film, putting the silver nanowire film on a heating plate of 120 DEG C for drying, and performing heat treatment of the silver nanowire film in an oven of 220 DEG C; (2) performing spin coating of silicon dioxide aerogel dispersion liquid on the silver nanowire film, making a silver nanowire / silicon dioxide aerogel composite conductive film, and performing drying of the silver nanowire / silicon dioxide aerogel composite conductive film on the heating plate of 120 DEG C; (3) coating uniformly mixed PDMS to the surface of the composite conductive film to perform heating curing, and making an AgNWs-silicon dioxide aerogel-PDMS composite flexible transparent electrode; and (4) directing peeling off the cured PDMS from a glass substrate, and completing the transferring of the silver nanowire transparent conductive film. The method for transferring the silver nanowire transparent conductive film to the flexible substrate realizes the complete transferring of the silver nanowire transparent electrode to effectively reduce the node resistance between nanowires, reduce the surface roughness of a network, make a silver nanowire flexible transparent conductive film with good performances and have an actual application value.

Description

technical field [0001] The invention provides a method for transferring a silver nanowire transparent conductive film to a flexible substrate. Background technique [0002] In recent years, with the development of integration and softness of optoelectronic devices, wearable, foldable and portable soft and elastic devices have attracted more and more attention from domestic and foreign scholars. Among them, the flexible stress sensor can be attached to the surface of irregular or rigid objects, and can also be attached to the human skin due to its flexible and elastic properties. It has potential application prospects in the fields of smart displays, medical health monitoring equipment, and electronic skin. However, in the production of sensors, at present, most rely on high-energy manufacturing processes such as silicon-based etching, flexible substrate surface plasma treatment, and metal deposition. Therefore, how to prepare low-cost and high-sensitivity flexible stress se...

Claims

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Application Information

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IPC IPC(8): H01B13/00
CPCH01B13/0026
Inventor 顾少轩张瑶姬梅梅
Owner WUHAN UNIV OF TECH
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