Piezoelectricity in PVDF and PVDF Based Piezoelectric Nanogenerator: A Concept

Polyvinylidene fluoride or simply PVDF is one of the most important semicrystalline polymers which generate piezoelectricity when a pressure or mechanical force applied on it. It has four crystalline phases α, β, ɣ and δ depending on the chain conformation structure. Among them α is non polar phase and β and ɣ are polar phase. Piezoelectricity in PVDF arises due to the β and ɣ phase formation. Several materials have been introduced for the preparation of nanogenerator. Among them PVDF (polyvinylidene fluoride) is most interesting material used in nanogenerator preparation due to its flexibility, biocompatiable, nontoxic in nature. It is used in nanogenerator application due to its good ferroelectric, piezoelectric and pyroelectric properties. In this article we describe little bit concept about PVDF, its piezoelectricity and PVDF based nanogenerator. Application of piezoelectric nanogenerator is also briefly described here.