Dielectric and structural property of bilayered films PVDF-TrFE/PbTiO3 based metal-insulator-metal capacitor prepared by sol-gel method

Development of innovative device design was fully utilized to fabricate hybrid composited PVDF-TrFE/PbTiO₃ that having bilayered films capacitors. Step by step of layer deposition trough spin coating method had performed an optimal thickness of ~ 319 nm PbTiO₃ first layer and ~470 nm polymer second layer. It was found that averagely 55.6 nm multigrain size of PbTiO₃ performed high densification films with minimal porosity behaviour. Thus, the co-polymer layer plays important role to cover up the porosity and as well as the stiffness of the PbTiO₃ first layer with membrane like structured films. The dielectric measurement of the bilayered films showed the reduction of dielectric constant at low frequency compared to the PbTiO₃ single layer, however, contrary effect on tangent loss (tan (δ)) measurement. The equivalent capacitance value of both films configuration showed some interest where the significant consideration of series capacitance effect on bilayered films could be ignored. Therefore, to the best of our known, the significant of this study is to investigate dielectric and structural property of nanoscaled device using hybrid combination of polymer/ceramic having bilayered composition based metal-insulator-metal capacitors.