pet-graphene-silver nanowire composite transparent conductive film and preparation method thereof

Abstract

The invention provides a method for preparing a PET-graphene-silver nanowire composite transparent conductive film, which includes cutting and cleaning the graphene substrate, preparing the silver nanowire solution, vacuum filtering the silver nanowire film, pressing, removing the filter film and Nitrogen drying step; the present invention also provides a PET-graphene-silver nanowire composite transparent conductive film made by the aforementioned method. The preparation method provided by the invention is to form silver nanowires and graphene independently and then compound them together, wherein the silver nanowires are formed into films by vacuum filtration, and the graphene is grown by CVD. The composite film thus prepared has both Silver nanowires have the advantages of uniform dispersion, controllable thickness, good mechanical flexibility, low sheet resistance, high optical transmittance, and low surface roughness, which can meet the requirements of device applications; and the provided composite transparent film only needs a small amount of silver nanowires. The combination of wires can achieve lower sheet resistance and higher light transmittance, which is 20%-40% lower than the sheet resistance of pure silver nanowire film at the same concentration.

Description

technical field [0001] The invention relates to the technical field of flexible transparent conductive films, in particular to a PET-graphene-silver nanowire (PET-Graphene-AgNWs) composite transparent conductive film and a preparation method thereof. Background technique [0002] Transparent electrodes are mainly used in microelectronics and optoelectronics fields such as flat-panel displays, organic electroluminescent devices (OLEDs), solar cells, touch panels, transparent transistors, etc., which require both high light transmittance and current input / output characteristics. The main requirements of transparent electrodes are: high light transmittance in the visible light band (generally requires transmittance greater than 80%), low sheet resistance (generally required to be less than 100Ω / □), low surface roughness and Stable mechanical and chemical properties, etc. In recent years, with the development of microelectronics and optoelectronic devices towards flexibility an...

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Problems solved by technology

[0006] Aiming at the technical problems that the uniformity of the film prepared by the existing preparation method is not good, and the utilization rate of the material is not high, the present invention provides a method for preparing a composite film of graphene and silver nanowires based on the principle of vacuum filtration. Graphene grown by chemical vapor deposition (Chemical Vapor Deposition, referred to as CVD) is used as the substrate of the composite material. Under the condition of solid-phase graphene with high electron mobility, only a small amount of silver nanowires can achieve lower sheet resistance and higher High light transmittance, and finally a PET-Graphene-AgNWs composite transparent conductive film

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