The semiconductor direct-current tribovoltaic nanogenerator (SDC-TVNG) is promising for developing a new semiconductor energy technology. However, dynamic metal–semiconductor Schottky contact interfaces suffer from wear which affects their working lifetime and limits their practical applications. Here, the SDC-TVNG built with a diamond without wear for ultralong life is reported. The triboelectrification and tribological characteristics of the diamond-based direct-current tribovoltaic nanogenerator (DDC-TVNG) are systematically studied with a ball-on-flat configuration. The DDC-TVNG maintains high triboelectric output after 345,600 reciprocating cycles without wear under the contact pressure of 2.0 GPa, which is far more than that of the silicon-based DC-TVNG. An increased normal load and sliding frequency enhance the triboelectric output. The extremely high hardness and anti-wear ability of the diamond is the key to the long lifetime performance. This work extends the investigation of semiconductor tribovoltaic nanogenerator and contributes to a deeper understanding of the tribovoltaic effect.

中文翻译：

---

长寿命金刚石基摩擦纳米发电机


半导体直流摩擦纳米发电机 （SDC-TVNG） 有望开发一种新的半导体能源技术。然而，动态金属-半导体肖特基接触界面会磨损，这会影响其使用寿命并限制其实际应用。在这里，报道了用金刚石构建的 SDC-TVNG，无磨损，具有超长的使用寿命。系统研究了金刚石直流直流摩擦纳米发电机 （DDC-TVNG） 的摩擦电气化和摩擦学特性。DDC-TVNG 在 2.0 GPa 的接触压力下，经过 345,600 次往复循环后仍能保持高摩擦电输出，无磨损，远高于硅基 DC-TVNG。增加的正常负载和滑动频率增强了摩擦电输出。金刚石的极高硬度和抗磨损能力是长寿命性能的关键。这项工作扩展了半导体摩擦光伏纳米发电机的研究，并有助于更深入地理解摩擦光伏效应。