Abstract Direct current (DC) power generation of piezoelectric nanogenerator (PNG) is promising for the realization of future self-powered electronics. Wurtzite structured two-dimensional (2-D) piezoelectric zinc oxide (ZnO) nanosheets can convert mechanical energy into electrical energy, and it produce DC output power. In this present work, we report DC power generation of PNGs based on the 2-D ZnO nanosheets. The growth condition has been optimized for the power generation, and effects of the surface morphologies and orientations have been investigated. The optimized PNGs produced voltage, current density and power density of up to 0.9 V, 16.5 μA cm−2 and 600 nW cm−2, respectively, for over 4000 cycles upon 4 kgf of force.

中文翻译：

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基于二维ZnO纳米片的直流柔性压电纳米发电机

摘要 压电纳米发电机 (PNG) 的直流 (DC) 发电有望实现未来的自供电电子产品。纤锌矿结构的二维（2-D）压电氧化锌（ZnO）纳米片可以将机械能转化为电能，并产生直流输出功率。在目前的工作中，我们报告了基于二维 ZnO 纳米片的 PNG 的直流发电。已经针对发电优化了生长条件，并且已经研究了表面形态和取向的影响。优化的 PNG 产生的电压、电流密度和功率密度分别高达 0.9 V、16.5 μA cm-2 和 600 nW cm-2，在 4 kgf 力下循环超过 4000 次。