Excellent ferroelectricity of thin poly(vinylidene fluoride-trifluoroethylene) copolymer films and low voltage operation of capacitors and diodes

Characteristics of metal-ferroelectrics-metal (MFM) capacitors and metal-ferroelectrics-insulator-semi-conductor (MFIS) diodes with poly(vinylidene fluoride-trifiuoroethylene) [P(VDF-TrFE)] copolymer films thinner than 100 nm were investigated. The films were prepared by spin-cast process and were annealed at 140degC in air for crystallization. The ferroelectric properties are equivalent to those of oxide ferroelectrics, even under low voltage or high frequency operation.