Energy conversion and storage using artificially induced antiferroelectricity in HfO2/ZrO2 nanolaminates.

The field-induced transition, which is useful for converting between electrical and thermal energy, was induced in artificially designed complementary-metal–oxide–semiconductor-compatible HfO 2 /ZrO 2 nanolaminates. The electrocaloric effect in HfO 2 /ZrO 2 nanolaminates was affected by the stacking order, attributed to differences in the relative fraction of the nonferroelectric monoclinic phase, and by the aspect ratio, reflecting crystallographic similarities to the tetragonal or orthorhombic phase. An adiabatic temperature change of up to 12.25 K was achieved using a HfO 2 /ZrO 2 bilayer sample. Furthermore, as an electrostatic supercapacitor, the energy storage density reached 49.90 J/cm3. [Display omitted] [ABSTRACT FROM AUTHOR]