The Interaction Between Graphene And Substrate And Its Effect On Photoelectric Devices

Graphene has excellent mechanical,thermal and optical properties,and has broad application prospects in composite materials,microelectronics,energy,information,flexible electronics and other fields.Research on the oxidation resistance of active metals is vital to many industrial applications.Once the metal layer in the device is damaged,it will definitely affect the performance of the device,and even directly cause damage to the device,which will bring huge economic losses.With its ultra-thin thickness,high chemical and thermal stability,and extremely low permeability,graphene has the potential to become a new generation of ultra-thin anti-corrosion materials.The main research work of this paper is as follows:(1)Preparation of graphene by chemical vapor deposition.The chemical vapor deposition method was successfully used to prepare the graphene films with smooth,clean surface and uniform growth.(2)Research on the oxidation resistance of graphene to copper on metal substrates.Experiments show that graphene does have the ability to protect the metal substrate from oxidation.Both the number of graphene layers and defects will affect its ability to protect the metal substrate from oxidation,that is,the more graphene layers,the fewer the defects of graphene,and the better the oxidation resistance of the metal protection.In addition,the crystal plane index of the metal substrate will also affect the protection of graphene on the metal substrate.(3)Research on the design and electrical measurement of optoelectronic devices based on graphene.A graphene-based photodetector was prepared using graphene samples obtained after oxidation.The responsivity of the device is 115.7 mA/W,which is two orders of magnitude higher than that of pure graphene-based photodetectors.This result provides the possibility of applying devices that do not need to be transferred after growing graphene by CVD.