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HVPE growth of GaN/InGaN heterostructure on r-plane sapphire substrate

  • Journal of the Korean Crystal Growth and Crystal Technology
  • Abbr : J. Korean Cryst. Growth Cryst. Technol.
  • 2007, 17(1), pp.6-10
  • Publisher : The Korea Association Of Crystal Growth, Inc.
  • Research Area : Engineering > Materials Science and Engineering

Hunsoo Jeon 1 Kyoung Hwa Kim 1 Min Yang 1 Hyung Soo Ahn 1 황선령 1 장근숙 1 이충현 1 Kim Suck Whan 2 장성환 3 이수민 3 박길한 3 M. Koike 3

1한국해양대학교
2안동대학교
3삼성전기

Accredited

ABSTRACT

The a-plane GaN layer on r-plane Al2O3 substrate is grown by mixed-source hydride vapor phase epitaxy (HVPE). The GaN/InGaN heterostructure is performed by selective area growth (SAG) method. The heterostructure consists of a GaN layer, an InGaN layer and a Mg-doped GaN layer. NH3 and gallium (or indium) chloride formed by HCl which is flown over mixed-source are used as gallium (or indium) and nitrogen sources. The gas flow rates of HCl and NH3 are maintained at 10 sccm and 500 sccm, respectively. The temperature of GaN source zone is 650oC. In case of InGaN, the temperature of source zone is 900oC. The growth temperatures of GaN and InGaN layers are 820oC and 850oC, respectively. The EL (electroluminescence) peak of GaN/InGaN heterostructure is at nearly 460 nm and the FWHM (full width at half maximum) is 0.67 eV. These results are demonstrated that the heterostructure of III-nitrides on r-plane sapphire can be successfully grown by mixed-source HVPE with multi-sliding boat system.

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