Current–voltage characteristics of electrochemically synthesized multi-layer graphene with polyaniline

摘要

Graphene nanosheets (GNS) synthesized through commercially available pencil lead were used to prepare composites with polyaniline on ITO coated PET substrate. IV characteristics of the GNS-PANI composite device shows a decrease in band gap of PANI from 2.8?eV to 6.9?meV at 15?wt% loading of GNS in PANI. SEM and Raman spectroscopy show good dispersion of GNS and interfacial interaction with the GNS-PANI composite by a significant shift in the G peak at 15?wt% GNS-PANI, further confirming the formation of the composite at 15?wt%. Instead of the in-situ polymerization process, the polymer and graphene were mixed externally in the desired concentrations and cast on the substrate directly, thereby offering a good control over the composition of the composite material.