Research Based On Graphene Preparation And Its Devices

Graphene, only one nanometer thickness, a new two dimensional nanomaterial, with a number of novel optical properties and electrical characteristics has attracted considerable researchers focus. Graphene with different size shows various photoelectric characteristics, the research based on physical properties, production methods and applications of graphene are necessary to investigate. Herein, we prepared graphene oxide with different size through chemical modified graphite, then, reduced by two methods and get reduced graphene, after that, we investigate the application of reduced graphene based on cell targeting, X-Ray detection and organic photovoltaic solar cells, the main research contents including:1. Based on different size graphite with chemical exfoliated method, the preparation process and two reduction methods were studied. After reduced graphene oxide, the structure and morphology of material are compared with graphene oxide, and improve two reduced methods and prepared the graphene quantum dots and organic functional graphene. The samples were characterized by FT-IR、TG-DSC、XRD、 SEM、TEM、absorption spectrum、electron microscopy and optical microscopy, two obtained graphene derivation are stable at room temperature.2. The optical characteristics based on graphene quantum dots and the graphene quantum dots can be used as the material based on cell targeting and X-ray detection were investigated. The influence based on the cytotoxicity and the size of graphene quantum dots to cell targeting is also discussed. The stable solid-state graphene quantum dots are prepared and the application based on X-ray detection is discussed. We combine the cell research based on graphene quantum dots and X-ray treatment together.3. Two structure photoelectric properties of organic functional graphene/polymer and organic functional graphene/co-polymer based on organic functional graphene as acceptor material were characterized. The influence of the active layer absorption spectrum, annealing temperature and time to interpenetrating net and conversion efficiency were discussed.