A kind of nano-silver wire-silver complex composite conductive ink and preparation method of transparent conductive film thereof

Abstract

The invention discloses silver nanowire-silver complex composite conductive ink which comprises silver nanowire ink and silver complex ink, wherein the silver nanowire ink accounts for 80-95 wt%, and the silver complex ink accounts for 5-20 wt%; the silver nanowire ink comprises a silver nanowire and a dispersing agent, the silver nanowire accounts for 0.5-5 wt%, and the dispersing agent accounts for 95-99.5 wt%; and the silver complex ink comprises a silver complex and a stabilizer, the silver complex accounts for 5-10 wt%, and the stabilizer accounts for 90-95wt%. According to the silver nanowire-silver complex composite conductive ink disclosed by the invention, the preservation period of the composite conductive ink can be prolonged, industrialized production is easily realized, the conductivity and uniformity of the formed film are improved, the speed of separating out the silver nanowire in the silver nanowire ink can be effectively reduced, and the silver nanowire is prevented from being agglomerated and settled; and meanwhile, the resistance uniformity of the silver nanowire after film formation can be increased.

Description

technical field [0001] The invention relates to the technical field of liquid crystals, in particular to a preparation method based on nano-silver wire conductive ink and a transparent conductive film thereof. Background technique [0002] Transparent conductive film is a flexible film with high light transmittance and conductive properties in the visible light range, which can be used in various fields such as touch, display, photovoltaic, lighting, and wearable electronic devices. At present, ITO conductive film occupies 90% of the market of transparent conductive film, but it has the problems of high price, poor flexibility, high energy consumption and high resistance, so there is an urgent need for new alternative technologies suitable for bending applications and large-scale applications. [0003] The nano-silver wire transparent conductive film realizes the conductive function by forming a network structure through intersecting and interpenetrating nano-silver wires, a...

AI Technical Summary

Problems solved by technology

Nano-silver wires have high surface activity and are prone to agglomeration and sedimentation when dispersed in solvents. On the one hand, the prepared nano-silver wire ink has poor stability and short shelf life, making it difficult for industrial production; on the other hand, it causes the formation of nano-silver wire ink. Thin film, poor resistance uniformity, does not meet application requirements

In order to solve these problems, technicians have adopted many methods to adjust the formula of silver nano wire ink to improve the problem of agglomeration and sedimentation of nano silver wire and poor uniformity of film resistance.

For example, adding a high polymer to the silver nano wire ink can effectively cover the surface of the silver nano wire, thereby avoiding the agglomeration of the silver nano wires in contact with each other. Although the stability of the silver nano wire ink can be improved, the high polymer The addition of nano silver wire ink will significantly increase the resistance after film formation; for example, adding surfactants to nano silver wire ink can improve the resistance uniformity of nano silver wire ink after film formation, but it cannot improve the resistance of nano silver wire ink. The stability of the film will also affect the resistance of the silver nano wire ink after film formation

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