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Effect of substrate and electrode on the crystalline structure and energy storage performance of antiferroelectric PbZrO3 films

Authors: 

Minh D. Nguyen

Source title: 
Thin Solid Films, 717: 138441, 2021 (ISI)
Academic year of acceptance: 
2020-2021
Abstract: 

We report on the correlated investigation between crystal structures, field-induced phase transition, and energy storage properties of both polycrystalline and epitaxial antiferroelectric PbZrO3 (PZO) films grown by pulsed laser deposition on Si and SrTiO3 substrates. The structural characterization revealed the polycrystalline structure of the PZO films on Pt/Si and the epitaxial relationship between the films and the SrTiO3/Si and SrTiO3 substrates. Different to normal ferroelectric fi

lms, the polycrystalline PZO films show similar polarization loops but with a higher maximum polarization, resulting in a larger energy storage density under the same conditions. Due to the larger electric breakdown strength (2800 kV/cm), however, the epitaxial PZO films grown on SrTiO3/Si have a higher recoverable energy storage density (24.9 J/cm3) than those on Pt/Si (23.4 J/cm3 at 2500 kV/cm) and on SrTiO3 (22.0 J/cm3 at 2550 kV/cm). Additionally, the introduction of SrRuO3 oxide-electrode improves the endurance performance of energy storage properties of the films on STO/Si by suppressing the formation of the dead layer between the film and the electrode. In this way, applications based on PZO films would be more easily integrated on Si and open the way to develop high-power commercial energy storage systems.