| 초록 |
Polymer-based piezoelectric films have been attracting interest because of its good formability compared to ceramic-based piezoelectric films. The polymer films were found to exhibit a low piezoelectric charge coefficient (d33) of ~ 20 pC/N, therefore, many research groups have designed polymer-ceramic composite (3-0) films to enhance piezoelectric properties. In this study, we designed a novel structure of polymer composite films with 3-3 networking structure, which can offer a high piezoelectric voltage given by an effective strain change from the porous BaTiO3 inverse opal structure. The inverse opal structure was found to exhibit simultaneously a high d33 value and a good flexibility, therefore, a piezoelectric voltage coefficient g33 can be obtained. Moreover, the 3-3 network piezoelectric films retain flexible state along x-y axis as well as z axis, which can be used with high feasibility as a piezoelectric device on a rigid substrate. |
