Enhancement of PbZrO3 polarization using a Ti seed layer for energy storage application

[摘要] Enhancement of lead zirconate (PbZrO3) polarization is achieved by using a titanium seed layer on alumina polycrystalline substrate. Thanks to the reduction of the lattice mismatch between the platinum electrode (3.92 angstrom) and the PbZrO3 films (4.14 angstrom), lead zirconate thin films oriented along the (111) direction with an orientation factor of around 65 % has been obtained. The (111) PbZrO3 presents an increase of 56 % of the polarization compared to the (100) PbZrO3. This enhancement is responsible of the higher recoverable energy storage density obtained in the (111) PbZrO3 thin films (8 J/cm(3) at 600 kV/cm with an efficiency of 72 %). The (111) PbZrO3 also has a higher figure of merit, which indicates that the (111) crystallographic plane is the most favorable direction for energy storage.

[发布日期] 2020-12-31

[关键词] Antiferroelectric;Energy storage;Lead zirconate;Sol-gel deposition;Titanium seed layer