Journal
NANOSCALE
Volume 8, Issue 3, Pages 1314-1321Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5nr07185b
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Funding
- Basic Science Research Program through National Research Foundation of Korea [NRF-2015R1A1A1A05027235]
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We report high performance flexible piezoelectric nanogenerators (PENGs) by employing vanadium (V)-doped ZnO nanosheets (NSs) and the polydimethylsiloxane (PDMS) composite structure. The V-doped ZnO NSs were synthesized to overcome the inherently low piezoelectric properties of intrinsic ZnO. Ferroelectric phase transition induced in the V-doped ZnO NSs contributed to significantly improve the performance of the PENGs after the poling process. Consequently, the PENGs exhibited high output voltage and current up to similar to 32 V and similar to 6.2 mu A, respectively, under the applied strain, which are sufficient to directly turn on a number of light emitting diodes (LEDs). The composite approach for PENG fabrication is scalable, robust, and reproducible during periodic bending/releasing over extended cycles. The approach introduced here extends the performance limits of ZnO-based PENGs and demonstrates their potential as energy harvesting devices.
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