Method for improving conductivity and transmittance of silver nanowire transparent conductive film

Abstract

The invention discloses a method for improving conductivity and transmittance of a silver nanowire transparent conductive film. Under the room temperature and normal pressure, the silver nanowire transparent conductive film is soaked in a quaternary ammonium salt surfactant solution in specific concentration to remove polyvinylpyrrolidone (PVP) coated on the surface of each silver nanowire; and after the PVP is removed, due to high surface energy of the silver nanowire, junction points between the silver nanowires make contact and realize automatic fusion and welding to enable junction resistance between the silver nanowires to be reduced greatly, so that transmittance of the silver nanowire transparent conductive film is improved while improving the conductivity thereof, and a silver nanowire conductive network and a substrate can be prevented from being damaged due to conventional high-temperature and high-pressure welding. The method is simple to operate, low in cost and suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the field of nanotechnology, and in particular relates to a method for improving the conductivity and transmittance of a silver nanowire transparent conductive film. Background technique [0002] Transparent conductive film is a material that can conduct electricity and has high transmittance. It is an indispensable component in emerging technology products such as displays, touch screens, solar cells, and photodiodes. Currently, indium tin oxide (ITO) occupies a dominant position in the market because of its high optical transmittance (>90%) and low sheet resistance (<10Ω / □). However, flexibility and foldability are the development trends of future electronic products, solar cells, organic photodiodes and other technological products, and ITO thin films cannot meet the requirements of next-generation technological products due to their brittleness and cracking shortcomings. Silver nanowire transparent conductors have be...

AI Technical Summary

Problems solved by technology

However, such methods reduce the transmittance while improving the conductivity of the silver nanowire transparent conductive film.

This is because adding a conductive substance such as a silver source to the PVP adsorbed on the surface of Ag will inevitably increase the volume of the silver nanowires and reduce their optical properties.

Therefore, it is particularly important to develop a method that can improve the transmittance of the silver nanowire transparent conductive film without reducing or even improving its optical transmittance, and there is no method in the prior art that can simultaneously improve the electrical conductivity and optical properties of the silver nanowire transparent conductive film. The method of transmittance, in view of this, the present invention proposes a kind of method that can improve conductivity and transmittance of silver nanowire transparent conductive film simultaneously

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