期刊
NANO ENERGY
卷 83, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2021.105826
关键词
Anodic oxidation; SiC nanowire arrays; Piezoelectric nanogenerators; Harsh conditions; Output properties
类别
资金
- National Science Fund for Distinguished Young Scholars [52025041]
- National Natural Science Foundation of China [51974021, 51902020]
- Fundamental Research Funds for the Central Universities [FRF-TP-18-045A1, FRFTP19004B2Z]
- National Postdoctoral Program for Innovative Talents [BX20180034]
- China Postdoctoral Science Foundation [2018M641192]
PENGs based on large scale free-standing N doped 4H-SiC nanowire arrays show excellent performance and stability, making them promising for applications in environmental energy harvesting and self-powered sensors.
Piezoelectric nanogenerators (PENGs) have been attracting much attention for their high flexibility, low density and outstanding chemical stability in applications of environmental energy harvesting and self-powered sensors. Here, PENGs based on large scale free-standing N doped 4H-SiC nanowire arrays (NWAs) fabricated by anodic oxidation of single-crystalline N doped 4H-SiC wafer are proposed for the first time. Due to N-dopants bring the SiC semiconductors an enhanced piezoelectric performance, the as-prepared PENGs show excellent performance with the peak values of open circuit voltage and short circuit current density of 3.0 V and 200 nA cm-2, respectively. Service stability of PENGs has been proven by 20,000 consecutive charge-discharge cycles as well. Moreover, the PENGs exhibit high thermal stability against 200 ?C and excellent acid-base resistance. The energy generated by PENGs is enough to charge capacitors through a full bridge rectifier without any external power supply, certifying that they can work as standalone nanoscale energy sources. These results innovatively expand the feasibility of 4H-SiC for application in a wide variety of high-performance energy harvesting devices.
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