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1 results

  • Physical Properties of Bulk GaN Crystals Grown by HVPE

  • Yu.V. Melnik, K.V. Vassilevski, I.P. Nikitina, A.I. Babanin, V. Yu. Davydov, V. A. Dmitriev
  • Journal:
    Materials Research Society Internet Journal of Nitride Semiconductor Research / Volume 2 / 1997
    Published online by Cambridge University Press:
    13 June 2014, e39
    Print publication:
    1997
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  • Free standing GaN platelets were fabricated by hydride vapor phase epitaxy (HVPE). The platelets having a current maximum size of 7×6×0.1 mm3 were obtained by HVPE growth of ~100 μm thick GaN layers on SiC substrates and subsequent removal of the substrates by reactive ion etching (RIE). Surface of the GaN platelets was characterized by reflectance high energy election diffraction (RHEED), and Auger electron spectroscopy (AES). Crystal structure and optical properties of the platelets were studied by x-ray diffraction and photoluminescence (PL), respectively. Raman spectroscopy was also applied for material characterization. Residual strain was detected in the crystals. The stress was eliminated by high temperature anneal.