Enhanced dielectric/ferroelectric properties of P(VDF-TrFE) composite films with organic perovskite ferroelectrics

Abstract

With the excellent stability, flexibility and piezoelectricity, poly(vinylidene fluoride) (PVDF) and its copolymer (P(VDF-TrFE)) have received much attention. However, the applications for its ferroelectricity still suffers the drawback of relative low remanent polarization (Pr) and high coercive electric field (Ec). In this work, P(VDF-TrFE) composite films were fabricated with the additive of organic perovskite ferroelectric MDABCO-NH4I3. Compared with pure P(VDF-TrFE), Pr increases from 7.17 to 12.7 μC/cm2, while Ec decreases from 516 to 324 kV/cm, as well as increased permittivity from 15.6 to 37.0. These may provide an alternative way for ferroelectric memory, sensors and energy storage devices.