High-performance flexible dielectric tunable BTS thin films prepared on copper foils

Abstract

Abstract High-performance flexible dielectric tunable BaSn0.15Ti0.85O3 thin films are prepared by barrier layer of Sb doped SnO2 on the copper foils. Dielectric measurements indicate that the flexible thin films exhibit a low dielectric loss of below 0.007, a medium dielectric constant of ∼378, and the superior tunable dielectric properties at room temperature. Calculations of tunability and figure of merit (FOM) display a maximum value of 66.5% at 500 kV/cm and ∼77.3, respectively. In particular, the flexible BaSn0.15Ti0.85O3 thin films show excellent fatigue properties during the bending cycle tests. The results demonstrate that the BaSn0.15Ti0.85O3 thin films prepared on copper foils are an excellent candidate for electrically tunable applications in flexible and wearable electronics.