In this study, Ag/(K,Na)NbO3 heterostructure constructed by in-situ photoreduction reaction is firstly introduced to fabricate the flexible piezoelectric nanogenerator (p-NG). The chemical heterojunction can improve the partial voltage applied to the KNN particles during poling process, and significantly enhance the orientation of dipole moment under the electric field. The p-NG device with Ag/(K,Na)NbO3 heterostructure generates two orders of magnitude higher output than the pure KNN-based device (240 VS. 3.5 V; 23 VS. 0.3 µA under mechanical stress of 0.1 MPa). The maximum instantaneous output power (1.13 mW) is higher than the previously reported lead-free composite-based piezoelectric nanogenerators. Moreover, these Ag/(K,Na)NbO3-based p-NG devices retained the mechanical robustness and electrical properties after 1000 cycles in the durability test. In addition, nine commercial LEDs connected in series can be successfully illuminated by our p-NG device without any storage equipment.
|Number of pages||8|
|State||Published - Aug 2018|
Bibliographical noteFunding Information:
The work was supported by the China Postdoctoral Science Foundation (Grant no. 2017M612177 ), National Natural Science Foundation of China (Grant nos. 51702119, 51702122 ), Shandong Provincial Natural Science Foundation ( ZR2016EMQ07 ), Postdoctoral Science Foundation from University of Jinan ( XBH1701 ).
© 2018 Elsevier Ltd
- Enhanced polarization
- Piezoelectric nanogenerator
- Sodium potassium niobate
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Materials Science (all)
- Electrical and Electronic Engineering