Vertically Aligned Piezoelectric Perovskite Nanowire Array on Flexible Conducting Substrate for Energy Harvesting Applications

Dong Yeol Hyeon, Kwi Il Park

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

Energy conversion based on vertically aligned piezoelectric nanowire (NW) arrays is of great interest because of their unusual properties originating from large surface area/high aspect ratio and excellent piezoelectric properties. Here, perovskite-structured piezoelectric BaTiO3 NW arrays are vertically grown onto the flexible Ti substrates by a two-step hydrothermal reaction to realize an aligned 1D nanostructures-based flexible energy harvester. The BaTiO3 NW array-based flexible piezoelectric energy harvester (PEH) successfully converts a maximum open-circuit voltage of ≈15 V, a maximum short-circuit current of ≈400 nA, and an effective power of ≈0.27 µW during repeated bending deformations. Under pressing with an external force of 49.57 N, the harvested output signals of the vertically aligned NW arrays-based PEH are ≈20 V and ≈60 nA. Finite element analysis with multiphysics simulation supports the hypothesis of effective potential generation by the NW arrays-based flexible PEH. These results can aid in the further development of high-output 1D nanostructures-based flexible PEHs.

Original languageEnglish
Article number1900228
JournalAdvanced Materials Technologies
Volume4
Issue number8
DOIs
StatePublished - Aug 2019

Keywords

  • BaTiO
  • energy harvesting
  • nanowire array
  • piezoelectric

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