Integration of ferroelectric BaTiO3 on metallic Ni tapes for power generation

摘要

Ferroelectric BaTiO3 thin films were integrated directly on metallic Ni tapes by using pulsed laser for energy harvesting applications. Microstructure studies from x-ray diffraction and electron microscopy indicate that the as-grown BaTiO3 thin films have pure BaTiO3 crystal phase which consists of the crystalline assemblage of nanopillars with average cross sections from 100 nm to 200 nm directly on the Ni tapes. The BaTiO3 films have good interface structures and strong adhesion to the Ni metallic tapes. Dielectric measurements have shown the hysteresis loop at room temperature in the film with a large remnant polarization, indicating that the ferroelectric domains have been created in the as-deposited BTO films. The successful integration of ferroelectric thin films directly on metallic materials is considered to be very promising for the development of energy harvesting devices.