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A kind of transparent conductive silver mesh film and preparation method thereof

A transparent conductive and thin film preparation technology, which is applied in the manufacture of cables/conductors, conductive layers on insulating carriers, circuits, etc., can solve the problem of large grid structure roughness of transparent conductive films, easy aggregation of nanowires into bundles, and low dispersion and other problems, to achieve the effect of low cost, simple and environmentally friendly method, and eliminate seepage

Active Publication Date: 2020-08-28
NORTHEASTERN UNIV LIAONING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problems of large grid structure roughness of the nanowire transparent conductive film in the prior art, the nanowires are very easy to gather into bundles, and the dispersion is low, the present invention provides a transparent conductive film with high light transmittance and high conductivity. Silver grid thin film and preparation method capable of effectively controlling line width mesh of metallic silver grid structure in the thin film

Method used

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  • A kind of transparent conductive silver mesh film and preparation method thereof
  • A kind of transparent conductive silver mesh film and preparation method thereof
  • A kind of transparent conductive silver mesh film and preparation method thereof

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preparation example Construction

[0040] The present invention also provides a method for preparing a transparent conductive silver grid film using the particle-free silver ink, the film preparation method specifically comprising the following steps:

[0041] S1: Select the cracking liquid, and take an appropriate amount to coat it on the substrate, and control the temperature conditions to obtain the cracked plate.

[0042] The selected cracking fluid needs to have the characteristics of easy cracking after certain treatment, such as acrylic resin CA-600 emulsion, titanium dioxide sol, silica sol, crack nail polish, egg white and ice template, etc.

[0043] The substrate can be glass, polyethylene terephthalate (PET), polyimide (PI), polydimethylsiloxane (PDMS), photo paper substrate and the like.

[0044]In step S1, the appropriate amount of cracking solution is 20-100 μL.

[0045] In step S1, the coating treatment of the cracking liquid on the surface of the substrate may be drop coating, spin coating, spr...

Embodiment 1

[0064] In this embodiment, the untreated water-soluble acrylic resin CA-600 emulsion is used as the cracking solution, and 50 μL of the acrylic resin CA-600 emulsion is spin-coated on the glass substrate. During the spin-coating process, the spin-coating parameters are set as The uniform coating speed is 500rpm, the uniform coating time is 15s, the spin coating speed is 1000-5000rpm, and the spin coating time is 20s. After heating at a heating rate of 200°C / h, keep it at 200°C for 1h to obtain the following: figure 2 The morphology of the cracked plate under different rotational speed conditions is shown, from figure 2 It can be seen from the morphology of the cracked plate formed by the cracking liquid under different rotating speed conditions: with the increase of the spin coating speed, the line width of the cracked plate gradually becomes smaller, and the number of meshes becomes denser. exist figure 2 Among them, when the spin coating speed is 5000rpm, the template th...

Embodiment 2

[0069] In this example, 20 μL, 40 μL, 70 μL, and 80 μL of water-soluble acrylic resin CA-600 emulsion were used to make cracked plates, and the cracking solution was spin-coated on the glass substrate at a speed of 5000 rpm during the production process, and the spin-coating time was 20s. , dried at a final temperature of 250 °C for 1 h at a heating rate of 200 °C / h, and observed as Figure 5 The cross-sectional views of cracked plates with different thicknesses are shown, where the thicknesses of the cracked templates are 18 μm, 7 μm, 5 μm, and 3 μm. From Figure 5 It can be concluded that: by controlling the coating amount of the water-soluble acrylic resin CA-600 emulsion template, the thickness of the template can be controlled, and then the thickness of the obtained transparent conductive silver grid structure film can be controlled.

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Abstract

The present invention relates to the technical field of thin film materials, and in particular to a transparent conductive silver grid thin film and a preparation method thereof. The transparent conductive grid film is prepared from particle-free silver ink, and includes an irregular grid woven by silver grid lines extending in the plane direction, including a conductive area and an insulating area, and the conductive area is woven from silver grid lines. Irregularly shaped grid frame, the insulating area is a blank area surrounded by silver grid lines, the transparent conductive silver grid film thickness is 2-20μm, the transmittance is 60~92%, and the sheet resistance is 1-50Ω / sq, the present invention applies particle-free silver ink to a cracked plate made of acrylic resin CA-600 emulsion, and obtains the transparent conductive silver grid film after drying and cleaning. The grid structure in the present invention has good flexibility and conductivity, and can withstand multiple bends and flexions. By setting the spin coating process parameters, different grid morphologies can be obtained, thereby obtaining different transmittances and different A conductive film of sheet resistor.

Description

technical field [0001] The invention relates to the technical field of film materials, in particular to a transparent conductive silver grid film and a preparation method thereof. Background technique [0002] Transparent conductive film is a photoelectric material that combines optical transparency and conductivity. It has high light transmittance and high conductivity. It is widely used in OLEDs, flat panel displays, touch screens, transparent conductive electrodes (TCE), transparent electromagnetic wave shielding materials, In the field of electronic information industry such as transparent heaters and biomedical fields such as skin prosthetic sensors and smart contact lenses, one of the most important applications of transparent conductive films is transparent conductive electrodes (TCE), and indium tin oxide (ITO) is used to make TCE The most mature material has excellent electrical and optical properties, but the limitation and scarcity of metal indium lead to an incre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B5/14H01B13/00
Inventor 李晓东苏玉董越孙旭东孙峥
Owner NORTHEASTERN UNIV LIAONING
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