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Flexible piezoelectric nanogenerator based on Cu2O-ZnO p-n junction for energy harvesting

机译：基于Cu2O-ZnO p-n结的柔性压电纳米发电机，用于能量收集

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In this study, a nanogenerator based on Cu2O-ZnO p-n junction has been fabricated on Cu wire substrates for harvesting mechanical energy from the environment. The flexible nanogenerator is composed of a Cu substrate, a Cu2O layer, ZnO nanorods and an outer Au-coated paper electrode; the Cu2O layer was obtained by oxidizing Cu wires directly and the ZnO nanorods were grown on the Cu2O layer using a low-temperature hydrothermal method. The existence of the Cu2O-ZnO p-n junction makes a contribution towards reducing the number of excess electrons in the ZnO, which facilitates in improving the output signal and also overcomes short circuits. An Au-coated paper electrode can involve more nanorods in the power generation process. The DC output voltage was up to 42 mV and the maximum output current density was 400 nA, which are approximately a 13-fold higher voltage and a one order of magnitude larger current in comparison to devices without a Cu2O layer, respectively. This study may provide important insight into a facile fabrication method for low-cost and high-performance energy harvesting devices.
机译：在这项研究中，基于Cu2O-ZnO p-n结的纳米发电机已在铜线基板上制造，用于从环境中收集机械能。柔性纳米发生器由Cu基底，Cu 2 O层，ZnO纳米棒和外部Au涂布纸电极组成。通过直接氧化铜丝获得Cu2O层，并使用低温水热法在Zn2O层上生长ZnO纳米棒。 Cu 2 O-ZnO p-n结的存在有助于减少ZnO中多余的电子数量，这有助于改善输出信号并克服了短路问题。镀金纸电极可以在发电过程中包含更多的纳米棒。直流输出电压高达42 mV，最大输出电流密度为400 nA，与没有Cu2O层的器件相比，其电压分别高约13倍和大一个数量级。这项研究可能为低成本和高性能能量收集设备的简便制造方法提供重要的见识。

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