The tribovoltaic nanogenerator (TVNG) has evolved in recent years as a novel type of nanogenerator designed to address the limitations of the standard triboelectric nanogenerator in terms of output signal and charge generation. Besides the outstanding characteristics, the tribovoltaic effect can also well be coupled with another effect to further boost the output performance. In this work, we proposed firstly a frictional heat-assisted performance enhancement in dynamic Schottky contact from the rubbing between n-type silver selenide (Ag2Se) and aluminum. The chemical composition and physical characteristics of the Ag2Se ceramic were analyzed using X-ray diffraction, scanning electron microscopy, and Synchrotron X-ray tomography techniques. UV–Vis spectroscopy and UPS were also utilized in order to validate the semiconducting property of the n-type Ag2Se ceramic. Moreover, the presence of the Schottky junction was demonstrated through the analysis of the current-bias voltage characteristic curve of the Ag2Se/aluminum (Al) contact under varying stress and temperature conditions. The built-in electric field plays a crucial part in the tribovoltaic effect by efficiently transferring the excited carriers to an external load through sliding contact between Ag2Se and Al. Demonstrating the synergy between tribovoltaic and thermoelectric effects becomes achievable through the excellent thermoelectric property of Ag2Se. Herein, the proposed TVNG generated a peak output voltage and current of around 0.7 V and 24.8 nA, respectively, achieving a maximum output power of 12.6 nW at a load resistance of 10 kΩ. The influence of frictional heat on the output performance of the proposed TVNG was well demonstrated by the thermal-induced voltage and enhanced electrical output from continuous sliding. The concepts given in this study establish the basis for the progress of effective energy collection employing semiconducting materials and the advancement of flexible harvesting and sensing device development in the future.

中文翻译：

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Al/Ag2Se 基摩擦光伏纳米发电机动态肖特基接触中的摩擦热辅助性能增强


摩擦光伏纳米发电机 （TVNG） 近年来发展成为一种新型纳米发电机，旨在解决标准摩擦纳米发电机在输出信号和电荷产生方面的局限性。除了出色的特性外，摩擦光伏效应还可以很好地与另一种效应相结合，以进一步提高输出性能。在这项工作中，我们首先提出了一种摩擦热辅助性能，以增强 n 型硒化银 （Ag2Se） 和铝之间摩擦的动态肖特基接触性能。使用 X 射线衍射、扫描电子显微镜和同步加速器 X 射线断层扫描技术分析 Ag2Se 陶瓷的化学成分和物理特性。紫外-可见光谱和 UPS 也被用来验证 n 型 Ag2Se 陶瓷的半导体特性。此外，通过分析 Ag2Se/铝 （Al） 触点在不同应力和温度条件下的电流偏置电压特性曲线，证明了肖特基结的存在。内置电场通过 Ag2Se 和 Al 之间的滑动接触将激发的载流子有效地转移到外部负载，从而在摩擦光伏效应中起着至关重要的作用。通过 Ag2Se 出色的热电性能，可以实现摩擦光伏和热电效应之间的协同作用。在此，所提出的 TVNG 分别产生了约 0.7 V 和 24.8 nA 的峰值输出电压和电流，在 10 kΩ 的负载电阻下实现了 12.6 nW 的最大输出功率。 摩擦热对所提出的 TVNG 输出性能的影响通过热感应电压和连续滑动的增强电输出得到了很好的证明。本研究中给出的概念为采用半导体材料进行有效能量收集的进展以及未来柔性收集和传感设备的发展奠定了基础。