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Synthesis of Ferroelectric Poly(Vinylidene Fluoride) Copolymer Films and their Application in Integrated Full Organic Pyroelectric Sensors

A sol-gel-based fabrication route for obtaining ferroelectric P(VDF-TrFE) thin films via a spin-coating technique at low temperatures was developed. The ferroelectric and pyroelectric properties of IR-sensors based on these layers were determined by hysteresis loop measurements, by dielectric characterization and by the laser intensity modulation method. On-chip stepwise poling at room temperature turned out to be very effective in increasing the pyroelectric current response. Finally, the sensors were directly integrated with organic thin film transistors to guarantee a low impedance read-out of the response.