Performance enhancement of BaTiO3-PDMS flexible piezoelectric nanogenerator using double ZTO microsphere monolayers

초록

We report on enhanced output performance of a piezoelectric nanogenerator (PENG) based on BaTiO3 (BTO)-polydimethylsiloxane microclusters (MCs) composite films through structural optimization using ZnSnO3 (ZTO) microsphere monolayers. To improve the performance of the PENG via structural optimization, a monolayer of ZTO microspheres (MSs) was applied to the top and bottom of the PENG device, serving as a pressure concentrator. This structural modification enhanced the stress-transfer efficiency by effectively localizing external pressure during device operation. By optimizing the BTO MSs content to 30 wt percentages (wt%), the PENG achieved a maximum output voltage of 15.9 V and a current output of 172 nA. The PENG device with ZTO MSs-based monolayers on both the top and bottom surfaces exhibited the highest piezoelectric output, reaching 20.88 V and 306 nA, respectively—representing 1.31 and 1.77 times the output of the 30 wt% filler dispersed film without the ZTO microsphere monolayer. These findings demonstrate that structural optimizing can significantly enhance the performance of flexible PENG, supporting their potential use in wearable electronics and self-powered sensors.

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