Large electroresistance and tunable photovoltaic properties of ferroelectric nanoscale capacitors based on ultrathin super-tetragonal BiFeO3films

Hua Fan, Zhen Fan, Peilian Li, Fengyuan Zhang, Guo Tian, Junxiang Yao, Zhongwen Li, Xiao Song, Deyang Chen, Bing Han, Min Zeng, Sujuan Wu, Zhang Zhang, Minghui Qin, Xubing Lu, Jinwei Gao, Zengxing Lu, Zhi Zhang, Jiyan Dai, Xingsen GaoJun Ming Liu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

21 Citations (Scopus)

Abstract

Ferroelectric nanocapacitors with simultaneously tunable resistance and photovoltaic effect have great potential for realizing high-density non-volatile memories and multifunctional opto-electronic nanodevices. Here, using a polystyrene sphere template method, we developed well-ordered Au nanoelectrode arrays on super-tetragonal BiFeO3(T-BFO)/La0.7Sr0.3MnO3(LSMO) epitaxial thin films, forming Au/T-BFO/LSMO nanocapacitors. The nanocapacitors exhibited switchable resistance states and photovoltaic responses, controllable by the ferroelectric polarization of T-BFO. Owing to the giant polarization of T-BFO, both giant electroresistance (ON/OFF current ratio >20 000) and noticeable photovoltage (∼0.4 V) were achieved in the Au/T-BFO/LSMO nanocapacitors. These results demonstrate that the T-BFO-based nanocapacitors are promising for applications in high-density memories with multiple routes for non-destructive readout, as well as other multifunctional nanodevices.
Original languageEnglish
Pages (from-to)3323-3329
Number of pages7
JournalJournal of Materials Chemistry C
Volume5
Issue number13
DOIs
Publication statusPublished - 1 Jan 2017

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Chemistry

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