Transparent PVDF-TrFE/Graphene Oxide Ultrathin Films with Enhanced Energy Harvesting Performance

Poly(vinylidene fluoride/trifluoroethylene) (PVDF-TrFE) as a representative organic piezoelectric material have recently attracted wide attention. However, low dielectric permittivity limits its applications. We successfully prepared transparent PVDF-TrFE/graphene oxide (GO) ultrathin films. The addition of GO greatly improved the dielectric properties of PVDF-TrFE. The dielectric constant of the composite film is almost three times of that of the PVDF-TrFE film with the addition of 0.1 wt. % of GO nanosheets. Furthermore, the composite film also exhibits enhanced energy harvesting performance. The electric generator based on the PVDF-TrFE/ GO ultrathin film shows an output voltages of 49 mV under a pressure of 3.06 KPa. The advantages of transparence, flexibility and better energy harvesting performance make PVDF-TrFE/GO composite films much more attractive in promising applications of nano/micro electronic devices.