Get access
Advanced Materials

Bulk Photovoltaic Effect at Visible Wavelength in Epitaxial Ferroelectric BiFeO3 Thin Films

Authors

  • Wei Ji,

    1. Institute of Materials Research and Engineering (IMRE) A*STAR (Agency for Science, Technology and Research) 3 Research Link, 117602 (Singapore)
    2. Department of Electrical and Computer Engineering National University of Singapore Kent Ridge, 119260 (Singapore)
    Search for more papers by this author
  • Kui Yao,

    Corresponding author
    1. Institute of Materials Research and Engineering (IMRE) A*STAR (Agency for Science, Technology and Research) 3 Research Link, 117602 (Singapore)
    • Institute of Materials Research and Engineering (IMRE) A*STAR (Agency for Science, Technology and Research) 3 Research Link, 117602 (Singapore).
    Search for more papers by this author
  • Yung C. Liang

    1. Department of Electrical and Computer Engineering National University of Singapore Kent Ridge, 119260 (Singapore)
    Search for more papers by this author

Abstract

Appreciable photovoltaic responses to visible light are observed in epitaxial ferroelectric BiFeO3 thin films by sputtering deposition. The photocurrent direction is opposite to the BiFeO3 polarization vector and can be switched by poling the films in different directions (see figure). The as-deposited films are strongly self-polarized, exhibiting significant photovoltaic response before any electrical poling process.

original image
Get access to the full text of this article

Ancillary