In order to increase the migration length of adatoms in hydride vapor phase epitaxy (HVPE) of GaN films, indium was used as a surfactant in HVPE growth. For samples with indium, an increase of crystalline quality was confirmed by X-ray diffraction measurements, and an improvement of surface morphology was also observed. SIMS analysis showed that indium was incorporated in the as-grown GaN film, and indium related photoluminescence (PL) was also detected.
Keywords: GaN; substrate; HVPE; surfactant; SIMS