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Silver nanowire transparent conductive thin film and preparation method thereof

A technology of transparent conductive film and silver nanowires, which is applied in the manufacture of cables/conductors, conductive layers on insulating carriers, conductive materials dispersed in non-conductive inorganic materials, etc. Over-rate, increase square resistance and other issues, to achieve the effect of reducing square resistance, tight contact, and large contact area

Inactive Publication Date: 2017-11-07
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the preparation of the traditional silver nanowire transparent conductive film needs to add a resin adhesive to increase the contact between the silver nanowire and the substrate and the nanowire. The addition of the adhesive will affect the transmittance of the transparent conductive film. Increase its square resistance and reduce conductivity

Method used

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  • Silver nanowire transparent conductive thin film and preparation method thereof
  • Silver nanowire transparent conductive thin film and preparation method thereof
  • Silver nanowire transparent conductive thin film and preparation method thereof

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preparation example Construction

[0026] The embodiment of the present invention also provides a method for preparing the above-mentioned silver nanowire transparent conductive film, comprising the following steps:

[0027] Ultrasonic cleaning of flexible substrates;

[0028] Dispersing the silver nanowires in a solvent to form a silver nanowire dispersion, uniformly coating the silver nanowire dispersion on a flexible substrate, and drying to obtain a silver nanowire conductive layer;

[0029] The obtained silver nanowire conductive layer is subjected to hot-pressing treatment, so that the nano silver wire is plastically deformed and welded, and a flattened and connected silver nanowire transparent conductive film is obtained.

[0030] In the preparation method of the silver nanowire transparent conductive film provided by the embodiment of the present invention, the silver nanowire conductive layer is mechanically embedded on the surface of the flexible substrate by hot pressing, so that the silver nanowire ...

Embodiment 1

[0041] Select polyethylene terephthalate as a flexible substrate, and dry it after hydrophilic treatment; uniformly disperse silver nanowires in ethanol solution, and prepare a silver nanowire solution with a concentration of 0.5g / L; The silver nanowire solution is uniformly coated on the flexible substrate by spin coating, the spin coating speed is 3500r / min, and the drying time is 30s to obtain the silver nanowire conductive layer; the flexible substrate after spin coating is placed on the heating plate for Hot press treatment, the temperature of the heating plate is 100°C, the applied pressure is 1.5 bar, and the time is 10s. The light transmittance of the silver transparent conductive film after hot pressing was 86.5%, the square resistance was 47.6Ω / square, and the haze was 7.2.

Embodiment 2

[0043] Select polyethylene terephthalate as a flexible substrate, carry out hydrophilic treatment on it and then dry it; uniformly disperse the silver nanowires in the ethanol solution, and prepare a silver nanowire solution with a concentration of 1.0g / L; The silver nanowire solution is uniformly coated on the flexible substrate by spin coating, the spin coating speed is 3500r / min, and the drying time is 30s to obtain the silver nanowire conductive layer; the flexible substrate after spin coating is placed on the heating plate for Hot press treatment, the temperature of the heating plate is 120°C, the applied pressure is 2.0 bar, and the time is 10s. The light transmittance of the silver transparent conductive film after hot pressing was 85.7%, the square resistance was 41.8Ω / square, and the haze was 10.3.

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Abstract

The present invention is applicable to the field of transparent conductive films, and provides a transparent conductive film of silver nanowires. The transparent conductive film of silver nanowires includes a flexible substrate and silver nanowires covered on the flexible substrate. The silver nanowires The wires are connected in a flattened manner; the flattened connection is an interconnected network formed by plastically deforming the silver nanowires from a cylindrical shape to a strip shape. In the silver nanowire transparent conductive film provided by the present invention, the silver nanowires in the transparent conductive film are inlaid on the flexible substrate in a network shape, and the silver nanowires are flattened and connected, with close contact, large contact area, and no need Adding any binder, the light transmittance of the obtained transparent conductive film can reach 85%-90%, the square resistance is reduced to 30-50Ω / square, and the haze is 3-15.

Description

technical field [0001] The invention belongs to the field of transparent conductive films, in particular to a silver nanowire transparent conductive film and a preparation method thereof. Background technique [0002] The transparent conductive films that have been widely used at present are all prepared on hard substrate materials such as ceramics and glass. Applications. Compared with hard substrate materials, transparent conductive films prepared on organic flexible substrate materials not only have the same photoelectric characteristics, but also have many unique advantages, such as: can be bent and deformed, light and portable, not easy to break, can be The adoption of roll-to-roll industrialized continuous production is conducive to improving efficiency and facilitating transportation. [0003] Silver nanowire transparent conductive film has the characteristics of low surface resistance, high transmittance and high conductivity. It is one of the best choices for maki...

Claims

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Application Information

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IPC IPC(8): H01B1/22H01B1/02H01B5/14H01B13/00
CPCH01B1/22H01B1/02H01B5/14H01B13/00
Inventor 向雄志旷明胜程淼
Owner SHENZHEN UNIV
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