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. Transparent and ultrathin PVDF‐TrFE/GO composite films are successfully prepared. The composite film shows enhanced dielectric properties and energy harvesting performance due to the addition of GO nanosheets. The electric generator based on this ultrathin composite film shows an output voltages of 49 mV under a pressure of 3.06 KPa.