Multifactorial coupling to greatly enhance photocurrent density of BiFeO3-based ferroelectric photovoltaic architectures

  • Zehao Sun
  • , Jie Wei
  • , Tiantian Yang
  • , Minchuan Xiahou
  • , Ao Cao
  • , Junlong Zhang
  • , Youxin Yuanfeng
  • , Yanchun He

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

The ferroelectric photovoltaic effect in BiFeO3 has attracted much attention recently. However, the potential of BiFeO3 as a photovoltaic material is limited due to its low photocurrent density and consequently low power conversion efficiency. Herein, a novel ferroelectric photovoltaic architecture based on the (Pr, Ni) gradient-doped BiFeO3-based thin film coupled with Au nanoparticles layer has been designed and fabricated. The experimental results and analysis show that this photovoltaic architecture exhibits extremely large photocurrent density (5.19 mA/cm2), which is about 472 times larger than that of pure BiFeO3 film (11 μA/cm2) and about 10 times larger than that of the conventional (Pr, Ni)-doped BiFeO3 film (0.54 mA/cm2). The enhanced photocurrent density should be attributed to the multifactorial coupling effect in this photovoltaic architecture, including the built-in electric field formed by the gradient distribution of oxygen vacancies, the flexoelectric effect and Local Surface Plasmon Resonance effect of Au nanoparticles.

Original languageEnglish
Article number2035
JournalJournal of Materials Science: Materials in Electronics
Volume35
Issue number31
DOIs
StatePublished - Nov 2024

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