Synthesis And Application Research Of Graphene Materials Modified By Poly(Thiophene And Fluorene)

With their advanced and excellent properties,carbon nanomaterials have generated a great deal of interest in academia and industry.Among them,graphene has become one of the most exciting topics of research in recent years due to its unique physicochemical properties.It has a large theoretical specific surface area(close to 2600 m 2g-1),ultrahigh electron mobility(200000 cm2v-1s-1),high Young's modulus(?1.0 TPa),superior thermal conductivity(?5300 W/m·K),good electrical conductivity,and its optical transmittance is so strong that the optical absorbance of graphene has since been measured at just 2.3%.Due to the perfect and diverse performances of graphene,it makes the graphene and the graphene-based hybrid materials have many potential applications in various research areas,such as electronics,energy storage and conversion.Graphene shows superlative properties attractive for a wide range of potential applications.In order to meet specific requirements demanded for particular applications,the surface functionalization of graphene materials is essential.Hexylbenzene and poly(9,9-dihexylfluorene)were covalently grafted to Gra-Br by a Suzuki coupling reaction in our previous work.In this paper,5-bromo-2-thienylboronic acid,2,5-dibromo-3-hexylthiophene and 9,9-dioctylfluorene-2,7-diboronic acid were synthesized and covalently attached to the Gra-Br by Suzuki coupling reaction respectively.Attachment of PT and PFT was significantly improved the solubility of the graphene-based materials in organic solvents,and electron-energy transfer leading to colour changing was observed.This paper also confirms that it is possible to attach the polymer to the surface of graphene by C-C bond directly.Fossil fuel alternatives,such as solar energy,are moving to the forefront in a variety of research fields.Polymer-based organic photovoltaic systems hold the promise for a cost-effective,lightweight solar energy conversion platform.The function of such excitonic solar cells is based on photoinduced electron transfer from a donor to an acceptor.Graphene have become the ubiquitous acceptors because of their high electron affinity and ability to transport charge effectively.The most effective solar cells have been made from bicontinuous polymer-graphene composites,or so-called bulk heterojunctions.Based on this theory,a simply solar cell is maded in our work which active layer is GPF?GPF and GFT respectively.And various datas show that GPF?GPF and GFT are potential materials as the active layers for organic solar cells.