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For digging out eco-friendly and well-performed energy harvesters, piezoelectric nanogenerators are preferred owing to their effortless assembly. Corona-poling promotes output performance of either aligned or porous PVDF electrospun films and higher piezoelectric output was achieved by corona-poled porous PVDF electrospun films due to more poled electret dipoles in pores. Increasing the duration of electrospinning rendered more electret dipoles in PVDF porous electrospun films, resulting in higher piezoelectric output. Moreover, corona-poled PVDF/Y-ZnO porous electrospun films performed better than corona-poled PVDF/ZnO porous electrospun films because of the larger polar crystal face of Y-ZnO. Flexible piezoelectric polymer PVDF and high-piezoelectric Y-ZnO complement each other in electrospun films. With 15 wt% of Y-ZnO, corona-poled PVDF/Y-ZnO porous electrospun films generated maximum power density of 3.6 μW/cm 2 , which is 18 times that of PVDF/BiCl 3 electrospun films.

Corona−Poled Porous Electrospun Films of Gram−Scale Y−Doped ZnO and PVDF Composites for Piezoelectric Nanogenerators