Pyroelectric Energy Harvesting Using Ferroelectric Ba1−xCaxTiO3

Kei Hayashi, Eisuke Aikawa, Toru Ueno, Tsuyoshi Kajitani, Yuzuru Miyazaki

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8 Citations (Scopus)


The structural and pyroelectric properties of partially Ca-substituted BaTiO3, Ba1−xCaxTiO3 (0 ≤ x ≤ 0.2), are investigated. Partial Ca-substitution in BaTiO3 introduced tetragonal distortion in the TiO6 octahedrons and increased the displacement, Δd, of a Ti4+ cation from the center of an octahedron. This increase in Δd led to enhancement of remanent polarization and pyroelectric voltage, Vp. The pyroelectric energy storage behavior is demonstrated for the partially Ca-substituted BaTiO3. For the Ba0.9Ca0.1TiO3 sample which exhibited the highest Vp, the stored energy in an output capacitor was proven to be sufficient to operate micropower Internet of Things devices.

Original languageEnglish
Article number1701002
JournalPhysica Status Solidi (A) Applications and Materials Science
Issue number11
Publication statusPublished - 2018 Jun 6


  • BaTiO
  • Ca substitution
  • distortion
  • pyroelectric energy harvesting
  • remanent polarization


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