“…[10,11], inorganic semiconductors like ZnO, In N, GaN etc. [12], ferroelectric perovskite such as BiFeO 3 [13], and polymers such as polyvinylidene fluoride (PVDF) and its copolymers (poly(vinylidenefluorideco-trifluoroethylene), polyvinylidene fluoride hexafluoropropylene (PVDF-HFP)) [14,15] are widely reported for manufacturing PENGs. PVDF is a synthetic semi crystalline polymer, and its b-phase and c-phases are responsible for the piezoelectric power harvesting property.…”