Poly(vinylidene fluoride) (PVDF) nanofibers exhibit exceptional flexibility and pronounced piezoelectricity, making them fundamental components in next-generation energy harvesting and sensing systems. Nevertheless, substantially enhancing their piezoelectric output without degrading intrinsic material properties remains a formidable challenge. In this study, we present a novel strategy to enhance piezoelectric performance by integrating electrospun PVDF nanofibers with two- and three-dimensional photonic bandgap (PBG) structures. Under identical mechanical excitation, incorporating the PBG architecture markedly increased peak-to-peak output voltage compared with a standalone PVDF nanofiber. Fourier-transform infrared (FTIR) spectroscopy confirmed that the observed performance enhancement did not arise from an increased fraction of the electroactive β-phase, which remained unchanged across configurations. Instead, we attribute the significant improvement to phonon–photon coupling mediated by the PBG structure. This interaction confines mechanical energy, amplifies localized strain, and suppresses acoustic energy dissipation, thereby maximizing the mechanical-to-electrical conversion efficiency of the PVDF nanofibers.
This strategy offers a novel approach to designing high-performance, flexible energy harvesters and self-powered sensors without altering the piezoelectric material's intrinsic properties.


 

nanofibers,photonic bandgap