Graphene-P(VDF-TrFE) Multilayer Film for Flexible Applications

TLDR

P(VDF‑TrFE) serves as an effective doping layer for graphene, reducing its sheet resistance to 188 Ω sq⁻¹. The graphene/P(VDF‑TrFE)/graphene multilayer film enables a flexible, transparent acoustic actuator and nanogenerator with broad‑frequency sensitivity, output voltage ≈3 V, current density ≈0.37 µA cm⁻²—comparable to ZnO/PZT devices—and demonstrates roll‑able operation under dynamic loading.

Abstract

A flexible, transparent acoustic actuator and nanogenerator based on graphene/P(VDF-TrFE)/graphene multilayer film is demonstrated. P(VDF-TrFE) is used as an effective doping layer for graphene and contributes significantly to decreasing the sheet resistance of graphene to 188 ohm/sq. The potentiality of graphene/P(VDF-TrFE)/graphene multilayer film is realized in fabricating transparent, flexible acoustic devices and nanogenerators to represent its functionality. The acoustic actuator shows good performance and sensitivity over a broad range of frequency. The output voltage and the current density of the nanogenerator are estimated to be ∼3 V and ∼0.37 μAcm–2, respectively, upon the application of pressure. These values are comparable to those reported earlier for ZnO- and PZT-based nanogenerators. Finally, the possibility of rollable devices based on graphene/P(VDF-TrFE)/graphene structure is also demonstrated under a dynamic mechanical loading condition.