Roll-to-roll process method for preparing high-performance nanometer silver wire transparent conductive thin film

Abstract

The invention discloses a roll-to-roll process method for preparing a high-performance nanometer silver wire transparent conductive thin film. The roll-to-roll process method sequentially involves an unwinding module, a coating module, a composite module and a winding module, wherein the coating module sequentially comprises a surface processing module, a coating device and a conductivity enhancement module, and the composite module sequentially comprises a curing adhesive composite module, a curing module and a stripping module. The invention provides a roll-to-roll process for preparing the high-performance nanometer silver wire conductive thin film, the means is simple, the cost is low, and large-area production of the high-performance flexible transparent conductive thin film can be achieved.

Description

technical field [0001] The invention relates to the field of transparent conduction, and more specifically, relates to a roll-to-roll process method for preparing a high-performance nano-silver wire transparent conduction film. Background technique [0002] Transparent conductive film is a basic optoelectronic material with both high conductivity and high transparency in the visible light band. It is widely used in optoelectronic display fields such as displays, light-emitting devices, solar cells, sensors, and flexible touch screens, and has broad commercial application prospects. The traditional transparent conductive film is based on indium tin oxide material. Although the display optoelectronic manufacturing technology based on this material is quite mature, the cost is relatively high because indium tin oxide contains rare materials; and the flexibility of indium tin oxide film is very poor. , cannot be used to prepare flexible displays, and is greatly limited in applic...

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Problems solved by technology

[0003] Although there are already a variety of technical routes in the laboratory that can be used to enhance the conductivity and stability of silver nanowire films, including the introduction of metal oxides, conductive polymers, high pressure, high temperature, laser welding, and the introduction of adhesives, etc., due to cost It is too high or it is difficult to be compatible with the roll-to-roll process, and the industrialization of this series of technologies is still in its infancy; and although there are commercialized nano-silver wire conductive films, its conductivity, light transmittance and In terms of stability, there is still a big gap with the nano-silver wire conductive film developed by the laboratory; Chinese patent CN 205044039 invented a roll-to-roll impregnation system for coating and cleaning flexible transparent conductive films, but did not mention how to improve transparency Conductive film characteristics; Chinese patent CN 104900302 proposes a hot pressing process to inlay nano-silver wires on the surface of transparent polymer film to enhance its conductivity; Chinese patent CN 102522145 proposes to introduce an adhesion-promoting layer to enhance the conductivity of nano-silver wires; but the above The two patents do not mention how to apply these means of enhancing the properties of transparent conductive films to large-area mass production technologies; in short, there is no clear technology or conclusion on how to realize high-performance flexible transparent nano-conductive films in the roll-to-roll process preparation of

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