Modification of the terahertz electromagnetic response of the semiconducting polymer polyfluorene by graphene oxide particles

The terahertz electromagnetic response of composite films based on the semiconducting polymer polyfluorene and graphene oxide particles is examined by terahertz time-domain spectroscopy. The spectra of complex permittivity in the range of 0.3–2.8 THz are measured for composite polyfluorene films with 7, 26, 50.6, and 73 wt % graphene oxide. It is found that the terahertz absorption coefficient and the real part of conductivity of the polyfluorene–graphene oxide composite increases significantly with the graphene oxide particles content increase.