Bulk and domain-wall effects in ferroelectric photovoltaics

Hiroki Matsuo, Yuuki Kitanaka, Ryotaro Inoue, Yuji Noguchi, Masaru Miyayama, Takanori Kiguchi, Toyohiko J. Konno

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

We investigate the photovoltaic (PV) effects in ferroelectrics based on the polar structure in domains and the intrinsic symmetry breaking of ferroelastic domain walls (DWs). A comprehensive analysis for BiFeO3 films with the single-domain and 71° domain structures reveals a major contribution of the DWs superimposed on the bulk PV effect, which can explain the enhanced PV response in the multidomain film exhibiting photovoltages greater than the band gap. Our methodology can reveal the contributions of the bulk PV and the DW-PV effects quantitatively and uncover a design strategy for enhancing ferroelectric photovoltaics.

Original languageEnglish
Article number214111
JournalPhysical Review B
Volume94
Issue number21
DOIs
Publication statusPublished - 2016 Dec 19

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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