Substrate‐polarity dependence of metal‐organic vapor‐phase epitaxy‐grown GaN on SiC

Single‐crystal gallium nitride was grown on each of the two polar {0001} planes of 6H‐silicon carbide substrates utilizing metal‐organic vapor‐phase epitaxy. The substrate polarity is clearly shown to strongly influence the surface morphology and the photoluminescence property of the layer. The examination of the layer surfaces using x‐ray photoelectron spectroscopy revealed that {0001} GaN grown on the basal planes of SiC changes its polarity in accordance with the substrate polarity.

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