Barium titanate-enhanced hexagonal boron nitride inks for printable high-performance dielectrics

Nanotechnology. 2022 Mar 4;33(21). doi: 10.1088/1361-6528/ac553f.


Printed electronics have been attracting significant interest for their potential to enable flexible and wearable electronic applications. Together with printable semiconductors, solution-processed dielectric inks are key in enabling low-power and high-performance printed electronics. In the quest for suitable dielectrics inks, two-dimensional materials such as hexagonal boron nitride (h-BN) have emerged in the form of printable dielectrics. In this work, we report barium titanate (BaTiO3) nanoparticles as an effective additive for inkjet-printable h-BN inks. The resulting inkjet printed BaTiO3/h-BN thin films reach a dielectric constant (εr) of ∼16 by adding 10% of BaTiO3nanoparticles (in their volume fraction to the exfoliated h-BN flakes) in water-based inks. This result enabled all-inkjet printed flexible capacitors withC ∼ 10.39 nF cm-2, paving the way to future low power, printed and flexible electronics.

Keywords: barium titanate nanoparticle; dielectrics; hexagonal boron nitride; inkjet printing; printed electronics.