Research On Interface Modification Between CVD-Grown Graphene And PEDOT:PSS

Graphene is a novel two-dimensional carbon material. Since single layer graphene was successfully isolated in 2010, this magic material has attracted widespread attention. Especially, considering of its high transparency, good electric conductivity and mechanical robustness, there is great research interest in grapheme-based optoelectronics application. Without question, graphene can be a satisfying replacement for ITO in OSCs.In order to expand industrial applications of graphene, it is important to explore the mechanism of graphene growth. To prepare a large area of high-quality graphene is particularly urgent. Chemical vapor deposition method is used as the basic experimental method. We regulate the process parameters for preparing high-quality graphene, and systematic analysis the deficiencies of conventional chemical vapor deposition method, then presented more simple and efficient method in some part of the experiment session to optimize the growth and transfer processes of graphene.The interface between graphene and organic layers is a key factor responsible for the performance of graphene based OSCs. In this paper, we focus on the topic of interface engineering of graphene and PEDOT:PSS. We demonstrate two approaches to address this issue and both methods can0020Olead to a good conductivity of this graphene based composite layer, thereby showing its positive effect on applying in OSCs. we convert graphene surface from hydrophobic to hydropholic via UV/Ozone treatment. On the other hand, we improved the wetting property of PEDOT:PSS solution with fluorosurfactant treatment, which made it possible to facilely deposit PEDOT:PSS onto graphene film. Based on the results we got, the effect of the two approaches and the possible application of the achieved PEDOT:PSS coated graphene in solar cells are discussed.Finally, based on the solid-liquid contact angle theory, the change of the graphene surface roughness can lead to the change of the contact angle between PEDOT:PSS solution and graphene. In this paper, we successfully get ZnO nano arrays in the graphene surface by hydrothermal method. The surface morphology and the array structure were characterized by scanning electron microscope. Then PEDOT:PSS solution was spin-coated on graphene for the observation.