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Large electroresistance and tunable photovoltaic properties of ferroelectric nanoscale capacitors based on ultrathin super-tetragonal BiFeO3 films

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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.

Graphical abstract: Large electroresistance and tunable photovoltaic properties of ferroelectric nanoscale capacitors based on ultrathin super-tetragonal BiFeO3 films

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Publication details

The article was received on 25 Oct 2016, accepted on 01 Mar 2017, published on 02 Mar 2017 and first published online on 02 Mar 2017


Article type: Paper
DOI: 10.1039/C6TC04615K
Citation: J. Mater. Chem. C, 2017, Advance Article
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    Large electroresistance and tunable photovoltaic properties of ferroelectric nanoscale capacitors based on ultrathin super-tetragonal BiFeO3 films

    H. Fan, Z. Fan, P. Li, F. Zhang, G. Tian, J. Yao, Z. Li, X. Song, D. Chen, B. Han, M. Zeng, S. Wu, Z. Zhang, M. Qin, X. Lu, J. Gao, Z. Lu, Z. Zhang, J. Dai, X. Gao and J. Liu, J. Mater. Chem. C, 2017, Advance Article , DOI: 10.1039/C6TC04615K

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