Piezo Effect of Polyvinylidene Fluoride Layer with Rochelle Salt

A piezo layer from polyvinylidene fluoride (PVDF) mixed with Rochelle salt(RS) was deposited for future electronics applications. The layers were obtained by solvent/antisolvent electrophoretic deposition. They are inhomogeneous and uneven composed of fibers and agglomerates of RS/PVDF mixture, individual PVDF fibers about 100 nm thick and RS crystals. Although inhomogeneous, the layers show an order of magnitude higher piezo modulus (413 pC/N) and comparable to inorganic piezo ceramics. Тhey can be used for energy harvesting systems and autonomous power supplies due to the high piezo effect and flexibility.