Tunable Work Function of Mg x Zn 1-x O as a Viable Friction Material for a Triboelectric Nanogenerator

Qi Zhen Guo, Liang Ciao Yang, Ruey Chi Wang, Chuan Pu Liu

研究成果: Article同行評審

12 引文 斯高帕斯(Scopus)


Since the invention of triboelectric nanogenerators (TENGs), their output performance has been improved through various approaches such as material surface modification, device structure optimization, and so on, but rarely through the development of new friction materials. In this work, a magnetron sputtered Mg x Zn 1-x O film is developed as a viable friction material that rubs against polydimethylsiloxane in a TENG. The work function, measured by Kelvin probe microscopy, of the Mg x Zn 1-x O films can be effectively tuned by varying Mg composition, x, and exposed surface facets, which are shown to dominate the charge-transfer behavior. In addition, film thickness also plays an important role, affecting the output performance. The output voltage and total charge of a TENG with a Mg x Zn 1-x O film are demonstrated to be tremendously enhanced by 55 and 90 times, respectively, compared to that of a TENG with a ZnO film. Even more intriguingly, the tribo-output polarity can be reversed by adjusting the relative work function through varying the preferred growth orientation of the Mg x Zn 1-x O film, for a given value of Mg content.

頁(從 - 到)1420-1425
期刊ACS Applied Materials and Interfaces
出版狀態Published - 2019 一月 9

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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