High crystallinity property of bilayer composited PbTiO3/PVDF-TrFE nanodielectric film capacitor

Abstract

Innovative advance dielectric materials were utilized to fabricate novel thin film capacitor device. This includes ceramic and polymeric material combination which is considered to enhance the dielectric polarization. The dielectric film presented in the study focused on PbTiO3/PVDF-TrFE which was prepared through layer-by-layer spin coating deposition method. The PVDF-TrFE coating was aimed to encapsulate the fragility and to improve the crystallinity property of PbTiO3 thin film surface. The preferential orientation of (1 0 1) tetragonal perovskite PbTiO3 was obtained in this and high crystallinity was found on bilayered PbTiO3/PVDF-TrFE film. The bilayered film produced good film surface in term of its uniformity and surface roughness. The εr and tan (δ) value of bilayered PbTiO3/ PVDF-TrFE film was taken at 1 kHz that approximately 220 and 0.09 respectively.