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Silver nanowire and graphene composite flexible transparent conductive film and preparation method thereof

A composite technology of transparent conductive film and graphene, which is applied in the direction of equipment for manufacturing conductive/semiconductive layers, cable/conductor manufacturing, conductive layers on insulating carriers, etc., can solve the conductivity and transmission problems of flexible transparent conductive films Poor conductivity, different conductivity in local areas of the composite film, uneven distribution of silver nanowires, etc., to achieve the effects of low requirements for experimental equipment, increased conductivity, and reduced contact resistance

Active Publication Date: 2020-02-14
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Most of the substrate materials used in existing flexible curved surface devices are polyethylene terephthalate films, namely PET substrates, with regular macromolecular chain structures, high crystallinity, and no strong polar groups in the molecules. group, so its surface affinity is poor
[0004] The flexible transparent conductive film prepared by the prior art method has poor conductivity and transmittance, and the phenomenon of different conductivity in local areas of the composite film caused by uneven distribution of silver nanowires often occurs

Method used

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  • Silver nanowire and graphene composite flexible transparent conductive film and preparation method thereof
  • Silver nanowire and graphene composite flexible transparent conductive film and preparation method thereof
  • Silver nanowire and graphene composite flexible transparent conductive film and preparation method thereof

Examples

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Embodiment 1

[0039] A method for preparing a silver nanowire and graphene composite flexible transparent conductive film, the method comprising the following steps:

[0040] 1) Preparation of ultra-slender silver nanowires: Dissolve silver nitrate, glucose and ferric sulfate in an appropriate amount of aqueous solution according to the mass ratio of 2:3:1, and add PVP (polyvinylpyrrolidone) with a ratio of 1:5 to the mass of silver nitrate and stir evenly, then pour it into an autoclave and heat it to 170°C for 6 hours. After centrifugation, the silver nanowire aggregates obtained by centrifugation are dispersed in a mixed solution with a volume ratio of ethanol and isopropanol of 3:1 to obtain a concentration of 10mg / ml high aspect ratio silver nanowire dispersion, wherein the silver nanowires have a diameter of 40-80nm and a length of 80-100μm;

[0041] 2) Take a PET (polyethylene terephthalate) substrate with a thickness of 0.2mm, soak it in acetone, isopropanol, and deionized water for...

Embodiment 2

[0046] A method for preparing a silver nanowire and graphene composite flexible transparent conductive film, the method comprising the following steps:

[0047] 1) Preparation of ultra-slender silver nanowires: Dissolve silver nitrate, glucose and ferric sulfate in an appropriate amount of aqueous solution according to the mass ratio of 2:2.5:1, and add PVP with a ratio of 1:7 to the mass of silver nitrate and stir evenly, then Pour it into an autoclave and heat it to 160°C for 7 hours. After centrifugation, the silver nanowire aggregates obtained by centrifugation are dispersed in a mixed solution of ethanol and isopropanol with a volume ratio of 3:1 to a concentration of 12 mg / ml. A diameter-ratio silver nanowire dispersion, wherein the silver nanowires have a diameter of 40-80 nm and a length of 80-100 μm;

[0048] 2) Take the PET substrate, immerse it in acetone, isopropanol, and deionized water for ultrasonic cleaning, and then soak it in a mixed solution of ammonia water...

Embodiment 3

[0053] A method for preparing a silver nanowire and graphene composite flexible transparent conductive film, the method comprising the following steps:

[0054] 1) Preparation of ultra-slender silver nanowires: Dissolve silver nitrate, glucose and ferric sulfate in an appropriate amount of aqueous solution according to the mass ratio of 1.8:2.7:1, and add PVP with a ratio of 1:5 to the mass of silver nitrate and stir evenly, then Pour it into an autoclave and heat it to 180°C for 5 hours. After centrifugation, the silver nanowire aggregates obtained by centrifugation are dispersed in a mixed solution of ethanol and isopropanol with a volume ratio of 3:1 to a concentration of 8 mg / ml. A diameter-ratio silver nanowire dispersion, wherein the silver nanowires have a diameter of 40-80 nm and a length of 80-100 μm;

[0055] 2) Take the PET substrate, soak it in acetone, isopropanol, and deionized water for ultrasonic cleaning, and then soak it in a mixed solution of ammonia water a...

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Abstract

The invention discloses a silver nanowire and graphene composite flexible transparent conductive film and a preparation method thereof. The method comprises steps of 1) preparing ultra-slender silvernanowire solution; 2) pretreating a substrate, then coating the substrate with the ultra-slender silver nanowire solution to obtain a silver nanowire layer, and then performing hot pressing treatmenton the silver nanowire layer; 3) preparing single-layer graphene by using a chemical vapor deposition method, and transferring the single-layer graphene to an upper surface of the silver nanowire layer by using wet transfer to obtain a graphene layer; and 4) finally, coating the graphene layer with a layer of PVA aqueous solution, and then heating and curing to obtain the composite flexible transparent conductive film. The method is simple in process, the graphene and the silver nanowire are compounded, so the transparent conductive film has advantages of good mechanical flexibility, low square resistance, high optical transmittance, low surface roughness and the like, and the service life is relatively long.

Description

technical field [0001] The invention relates to a silver nanowire and graphene composite flexible transparent conductive film and a preparation method thereof, belonging to the technical field of flexible conductive films. Background technique [0002] Transparent conductive films are widely used in optoelectronic fields such as flat panel displays, solar cells, optical communication equipment, and solid-state lighting. At present, the main application of transparent conductive film is still in touch screen technology. Touch screen is used in mobile phones, tablets, notebooks and mobile terminals. At present, the commercialized transparent conductive film is tin-doped indium oxide (ITO) film, although ITO has a high The electrical conductivity and light transmittance, but the mineable amount of indium resources is limited, and the rise in the price of indium has led to the rise in the price of ITO. At the same time, the indium tin oxide material is relatively brittle, and th...

Claims

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Application Information

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IPC IPC(8): H01B5/14H01B13/00
CPCH01B5/14H01B13/0026
Inventor 陶立李政雄陈启超陈佳熠朱蓓蓓
Owner SOUTHEAST UNIV