M J, K.K.Kalathi, J.T.2026-02-052020Journal of Alloys and Compounds, 2020, 843, , pp. -9258388https://doi.org/10.1016/j.jallcom.2020.155889https://idr.nitk.ac.in/handle/123456789/23604The energy storage density of the film capacitor is crucial for optoelectronic devices. Among various dielectrics, polyvinylidene-fluoride-co-hexafluoropropylene (PVDF-HFP) copolymer is widely preferred due to its inherent high dielectric constant and breakdown strength. However, the low energy storage density and high dielectric loss (tan ?) of PVDF-HFP remains challenging in the present scenario. In this work, we demonstrated how to improve the dielectric constant and energy density of PVDF-HFP with low dielectric losses by formulating PVDF-HFP/Lanthanum Zirconium Oxide (LZO) composite ink at low temperature. We performed the computational modeling of the thin-film capacitor, consisting of PVDF-HFP/LZO as a dielectric layer, to find the optimum LZO content for achieving a high energy density. A computational model of the film capacitor and dielectric shielding was built with PVDF-HFP/LZO composites having a different LZO content to understand its effect on the electric field distribution, polarization, and energy storage density. We compared the dielectric properties of the PVDF-HFP/LZO thin-film capacitor predicted by simulations with the experimental values measured by impedance analysis. The optimum LZO content in PVDF-HFP was determined as 15 vol% to achieve a high energy storage density of 15.8 J/cm3 at 545 MV/m breakdown strength with low dielectric losses. Dielectric constant and energy storage density of the PVDF-HFP/LZO15 composite film were nearly doubled compared to that of neat PVDF-HFP by keeping dielectric losses low. © 2020 Elsevier B.V.Composite filmsComputation theoryDielectric devicesDielectric lossesDielectric properties of solidsElectric breakdownEnergy storageFilm capacitorFluorine compoundsOptoelectronic devicesTemperatureThin film circuitsThin filmsZirconium compoundsDielectric performanceDielectric shieldingElectric field distributionsEnergy storage densityHigh dielectric constantsHigh energy densitiesHigh energy storage densitiesPolyvinylidene fluoridesDielectric materials