Ultra-low frequency P(VDF-TrFE) piezoelectric energy harvester on flexible substrate

This paper proposes a flexible piezoelectric energy harvester using the piezoelectric copolymer P(VDF-TrFE) films as active elements to convert mechanical inputs to electrical energy. The repeatedly spin-coated P(VDF-TrFE) films were thermally poled and then characterized by SEM, ferroelectric hysteresis and FTIR. The piezoelectric performance of the fabricated harvester was measured under periodical mechanical inputs at ultra-low frequencies. The electrical output of average V_pp was as high as 0.96 V at 0.65 Hz.