期刊
ACS APPLIED ELECTRONIC MATERIALS
卷 3, 期 5, 页码 2136-2144出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsaelm.1c00137
关键词
mechanical energy; piezoelectric nanogenerators; piezoelectric coefficient; P(VDF-TrFE); CsPbBr3 QDs
资金
- National Natural Science Foundation of China [11704032, 51432005]
- National Key RD Project [2016YFA0202704]
- Beijing Municipal Science & Technology Commission [Z171100000317001, Z171100002017017, Y3993113DF]
- CAS-TWAS President's Fellowship for International Doctoral Students
This study fabricated a P(VDF-TrFE) PENG doped with CsPbBr3 quantum dots, showing enhanced piezoelectric output performance and sensitivity to human movements, with great potential for self-powered sensing and energy harvesting applications.
Benefiting from high flexibility and lightweight characteristics, flexible piezoelectric nanogenerators (PENGs) have the potential to become a ubiquitously available and sustainable alternative source of energy. Herein, we fabricated a poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)) PENG doped with CsPbBr3 quantum dots (QDs), which reveals a remarkable enhancement in piezoelectric output performance. PENGs doped with 0.3 wt % of CsPbBr3 QDs exhibit an optimized piezoelectric coefficient from 15.5 to 24.5 pC N-1, and the corresponding open-circuit voltage and short-circuit current are enhanced by 2.5 and 2.2 times, respectively, thanks to the increased beta-phase content of the P(VDF-TrFE). The composite PENGs are sensitive to several human movements like bending, finger touch, and wind blowing, showing great potential for application in self-powered sensing and energy harvesting. Moreover, fatigue test under continuous mechanical stimuli, and after long periods of rest (up to 2 months), demonstrates the PENG capabilities to be used as a robust mechanical energy harvester.
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