Large electroresistance and tunable photovoltaic properties of ferroelectric nanoscale capacitors based on ultrathin super-tetragonal BiFeO3films
| Autor: | Xingsen Gao, Bing Han, Junxiang Yao, Sujuan Wu, Jun-Ming Liu, Zengxing Lu, Peilian Li, Hua Fan, Deyang Chen, Xiao Song, Guo Tian, Xubing Lu, Zhang Zhang, Minghui Qin, Fengyuan Zhang, Zhi Zhang, Jinwei Gao, Zhen Fan, Jiyan Dai, Min Zeng, Zhongwen Li |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Nanotechnology 02 engineering and technology General Chemistry Photovoltaic effect 021001 nanoscience & nanotechnology 01 natural sciences Ferroelectricity law.invention Capacitor chemistry.chemical_compound Tetragonal crystal system chemistry law 0103 physical sciences Materials Chemistry Polystyrene 010306 general physics 0210 nano-technology Polarization (electrochemistry) Nanoscopic scale Template method pattern |
| Zdroj: | Journal of Materials Chemistry C. 5:3323-3329 |
| ISSN: | 2050-7534 2050-7526 |
| DOI: | 10.1039/c6tc04615k |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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