Graphene-based transparent conductive film electrode as well as preparation method and application thereof

Abstract

The invention belongs to the technical field of electrodes, and particularly relates to a graphene-based transparent conductive film electrode as well as a preparation method and application thereof.The graphene-based transparent conductive film electrode provided by the invention comprises a transparent substrate, a silver nanowire grid loaded on the surface of the transparent substrate, a two-dimensional layered structure compound layer on the surface of the silver nanowire grid and a graphene film outer layer. According to the graphene-based transparent conductive film electrode as well asthe preparation method and the application thereof, the two-dimensional layered structure compound, the silver nanowires and the graphene film cooperate with one another, so that the defect that a single material is poor in mechanical stability or poor in photoelectric property is overcome, and the obtained graphene-based transparent conductive film electrode has relatively low resistance, relatively high transmittance and good mechanical flexibility and stability. Experimental results show that the square resistance of the graphene-based transparent conductive film electrode provided by theinvention is less than 50 ohm / sq, and the transmittance is 88.5-90.5%.

Description

technical field [0001] The invention belongs to the technical field of electrodes, and in particular relates to a graphene-based transparent conductive thin-film electrode and a preparation method and application thereof. Background technique [0002] Commercial indium tin oxide (ITO) has excellent photoelectric properties and has been widely used as a transparent conductive electrode material, but ITO has the disadvantages of limited deposition conditions, high cost, poor mechanical stability, poor chemical stability, and poor ductility, making ITO It is difficult to meet the increasing demand for flexibility, mechanical stretching and bending properties, therefore, it is of great significance to provide an alternative transparent conductive electrode material to ITO. [0003] Researchers have investigated several alternative conducting materials including carbon nanotubes, graphene, conducting polymers, metal grids and metal nanowires. Studies have found that the exfoliat...

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Problems solved by technology

Studies have found that the exfoliation and reduction of graphite and graphene oxide will reduce the quality of graphene, and functional groups such as residual oxygen will reduce the conductivity of graphene electrodes; while CVD graphene films will introduce defects, wrinkles, etc. during the transfer process, reducing the electrical conductivity of graphene electrodes. Its photoelectric properties, such as the high transmittance of CVD-grown single-layer graphene, but the sheet resistance is hundreds or even thousands of ohms per square (Li X, Zhu Y, Cai W, et al. Transfer of Large-Area Graphene Films for High-Performance Transparent Conductive Electrodes[J].Nano Letters,2009,9(12):4359-4363.); There are large insulating gaps between the conductive networks of silver nanowires, and the high resistance at the junction limits the conductor Microscopic conductivity, and easy to be oxidized to cause poor stability (Jun Wang, Jinting Jiu, Teppei Araki, Masaya Nogi, Tohru Sugahara, Shijo Nagao, Hirotaka Koga, Peng He, KatsuakiSuganuma.Silver Nanowire Electrodes: Conductivity Improvement Without Post-treatment and Application in Capacitive Pressure Sensors[J].Nano-MicroLetters,2015,7(01):51-58.); The unique structure and characteristics of MXene materials (two-dimensional layered structure compounds) show extraordinary potential, but with metal nanowires Compared with ITO-based transparent electrodes, MXene-based transparent electrodes have lower photoelectric properties. For example, Kanit et al. use spray-coated layered MXene flakes to manufacture transparent conductive films, which produce 5-70nm thick films on a large area, and the film resistance ranges from 0.5 To 8kΩ / sq, the lowest light transmittance is only 40% (Hatanasirisakul, K., et al. (2016). Fabrication of Ti 3 C 2 T x MXene transparent thin films with tunable optoelectronic properties. Advanced Electronic Materials, 2, 1600050.)

[0004] Therefore, there are still no reports of transparent conductive electrode materials that can replace ITO with both stability and photoelectric performance.

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