Piezoelectric nanogenerator based on lead-free BiFeO3:Sr perovskite
- Authors
- Khadtare, Shubhangi; Kumar, Anuruddh; Jung, Uijin; Sang, Chengwen; Park, Jinsub
- Issue Date
- Dec-2022
- Publisher
- Elsevier Ltd
- Keywords
- lead-free perovskite; Sr doping; BiSr-FeO3; piezoelectric nanogenerator; piezoelectric sensor
- Citation
- Journal of Alloys and Compounds, v.926, pp.1 - 9
- Indexed
- SCIE
SCOPUS
- Journal Title
- Journal of Alloys and Compounds
- Volume
- 926
- Start Page
- 1
- End Page
- 9
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/186173
- DOI
- 10.1016/j.jallcom.2022.166738
- ISSN
- 0925-8388
- Abstract
- The current work reports the synthesis of Bi1−xSrxFeO3 (SBFO; x = 0.0, 0.15, 0.25, 0.35) nanoparticles by sol-gel method and study of its structural and piezoelectric properties. X-ray diffraction identifies the phase transformation from rhombohedral to cubic of BiFeO3 upon doping of Sr. X-ray photoemission spectroscopy revealed that Sr doped BiFeO3 nanoparticles are rich with oxygen vacancies compared to the bare BiFeO3 nanoparticles. The highest maximal polarization value of 6.74 µC cm−2 and remnant polarization 4.20 µC cm−2 are observed for BiFeO3 with 25% of Sr. The SBFO-PENG with 25% of Sr content device provides output voltage and current of 6.35 V and 0.64 μA under pushing tester with 1 Hz frequency, which is higher to that for a bare BiFeO3 PENG. It also exhibits high mechanical robustness, and much stable and durable output even after 1500 s. A maximum power density of ~ 0.31 µWcm−2 was achieve at a resistive load of 108 Ω. The SBFO-PENG device's feasibility is tested by trigging commercial electronics such as charging capacitors and lighting the LED, and it can drive a 0.47 μF capacitor to store the energy of 7.29 μJ within 500 s under pushing tester.
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