Slimani Tlemcani Taoufik, Justeau Camille, Nadaud Kevin, Alquier Daniel, Poulin-Vittrant Guylaine
GREMAN UMR 7347, Université de Tours, CNRS, INSA Centre Val de Loire, 37071 Tours, France.
Nanomaterials (Basel). 2021 May 28;11(6):1433. doi: 10.3390/nano11061433.
Flexible piezoelectric nanogenerators (PENGs) are very attractive for mechanical energy harvesting due to their high potential for realizing self-powered sensors and low-power electronics. In this paper, a PENG that is based on zinc oxide (ZnO) nanowires (NWs) is fabricated on flexible and transparent Polydimethylsiloxane (PDMS) substrate. The ZnO NWs were deposited on two different seed layer structures, i.e., gold (Au)/ZnO and tin-doped indium-oxide (ITO)/ZnO, using hydrothermal synthesis. Along with the structural and morphological analyses of ZnO NWs, the electrical characterization was also investigated for ZnO NWs-based flexible PENGs. In order to evaluate the suitability of the PENG device structure, the electrical output performance was studied. By applying a periodic mechanical force of 3 N, the ZnO NWs-based flexible PENG generated a maximum root mean square (RMS) voltage and average power of 2.7 V and 64 nW, respectively. Moreover, the comparison between the fabricated device performances shows that a higher electrical output can be obtained when ITO/ZnO seed layer structure is adopted. The proposed ZnO NWs-based PENG structure can provide a flexible and cost-effective device for supplying portable electronics.
柔性压电纳米发电机（PENGs）因其在实现自供电传感器和低功耗电子设备方面的巨大潜力，在机械能收集方面极具吸引力。本文在柔性透明聚二甲基硅氧烷（PDMS）衬底上制备了一种基于氧化锌（ZnO）纳米线（NWs）的PENG。采用水热合成法将ZnO纳米线沉积在两种不同的种子层结构上，即金（Au）/ZnO和锡掺杂氧化铟（ITO）/ZnO。除了对ZnO纳米线进行结构和形态分析外，还对基于ZnO纳米线的柔性PENG进行了电学表征。为了评估PENG器件结构的适用性，研究了其电输出性能。通过施加3 N的周期性机械力，基于ZnO纳米线的柔性PENG分别产生了2.7 V的最大均方根（RMS）电压和64 nW的平均功率。此外，所制备器件性能的比较表明，采用ITO/ZnO种子层结构时可获得更高的电输出。所提出的基于ZnO纳米线的PENG结构可为便携式电子设备供电提供一种柔性且经济高效的器件。
