| 초록 |
The electrical performance of piezoelectric polymers is very hard to reach that of piezoelectric ceramics basically and physically, even in the case of the representative ferroelectric polymer, poly(vinylidene fluoride-co-trifluoroethylene) (P(VDF-TrFE)). Recently, the concept for the morphotropic phase boundary (MPB), which had been exclusive in the field of high-performance piezoelectric ceramics, has been surprisingly discovered in P(VDF-TrFE) piezoelectric copolymers. This study demonstrates the exceptional behaviors reminiscent of MPB and relaxor ferroelectrics in the feature of widely utilized electrospun P(VDF-TrFE) nanofibers. Consequently, the new energy harvester that exceeds the performance limitation of the existing P(VDF-TrFE) materials is developed. Even the unpoled MPB-based P(VDF-TrFE) nanofiber show higher output than the electrically poled normal P(VDF-TrFE) nanofibers. |
