LAUSR

Abstract Graphene oxide/poly(3,4–ethylenedioxythiophene) composites were synthesized through Fenton's reaction. The synthesis was performed using graphene oxide intercalated with iron (III) chloride and hydrogen peroxide. Then, in situ polymerization of 3,4–ethylenedioxythiophene monomer via Fenton's reaction on graphene oxide was accomplished. The composites exhibit a matrix growth of poly(3,4–ethylenedioxythiophene) chains on and around the graphene oxide layers presenting π−π interactions between both materials. The electroactivity and optical properties of the composite were increased. The intercalation of iron (III) chloride is demonstrated through X–ray diffraction as the interlayer distance of the graphene oxide sheets increased with the addition of the compound. Transmission electron microscopy analysis was carried out to establish that the polymer matrix was growing around the layers. The Fourier transform infrared spectroscopy measurements were implemented as a complementary technique for Raman to confirm the possibility of a π–π interaction. The materials show a maximum fluorescence emission at 480 and 530 nm. Properties were measured to establish the presumable application in hybrid solar cells, due to the absorption of the composite in the UV and near–IR region in a range of 210–350 nm and 700–800 nm. The composites exhibited a matrix growth of conducting polymer chains on and around the graphene oxide layers presenting red–ox states with a potential application as a counter electrode.