Electrostatic energy storage in antiferroelectric like perovskite

Abstract Lead-free ferroelectric Na 0.5 Bi 0.5 TiO 3 (NBT) and NBT-doped Ln (Ln = Er and Ho) in both bulk and thin films forms were processed via solid-state reaction and solution deposition respectively. SEM investigations showed dense samples with fine-grained and smooth microstructure for thin films. A pure perovskite structure was observed by the X-ray diffraction for all specimens. The frequency dependences of the dielectric constant and loss tangent were investigated at room temperature and revealed a decrease in the dielectric losses with the introduction of the lanthanide element. The energy storage density ( W rec ) was calculated using the obtained P – E loops. The stored and delivered energies were found depending on the form and composition of the sample.