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High aspect-ratio InGaN nanowire photocatalyst grown by molecular beam epitaxy

  • Journal of the Korean Crystal Growth and Crystal Technology
  • Abbr : J. Korean Cryst. Growth Cryst. Technol.
  • 2019, 29(4), pp.143-148
  • DOI : 10.6111/JKCGCT.2019.29.4.143
  • Publisher : The Korea Association Of Crystal Growth, Inc.
  • Research Area : Engineering > Materials Science and Engineering
  • Received : July 30, 2019
  • Accepted : August 6, 2019
  • Published : August 31, 2019

Soyeon An 1 Dae-Woo Jeon 1 Jonghee Hwang 1 Yong-Ho Ra 1

1한국세라믹기술원

Accredited

ABSTRACT

We have successfully fabricated high aspect-ratio GaN-based nanowires on Si substrates using molecular beam epitaxy (MBE) system for high-efficiency hydrogen generation of photoelectrochemical water splitting. Scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX) demonstrated that p-GaN:Mg and p-InGaN nanowires were grown vertically on the substrate with high density. Furthermore, it was also confirmed that the emission wavelength of p-InGaN nanowire can be adjusted from 552 nm to 590 nm. Such high-aspect ratio p-InGaN nanowire structure will be a solid foundation for the realization of ultrahigh-efficiency photoelectrochemical water splitting through sunlight.

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