Synthesis of gallium nitride and related oxides via ammonobasic reactive sublimation (ARS)

Ammonobasic reactive sublimation (ARS) is proposed as a novel method to synthesize GaN and related oxides. Results indicate that GaN growth occurs by a nitriding process of Ga and related oxides, establishing a direct dependence on NH₄ OH amount added as a primary chemical reactive. The samples were grown on p-type Si (111) substrates inside a tube furnace, employing GaN powder and NH₄ OH. The characterizations of the samples were carried out by XRD, SEM, EDS and PL techniques, revealing the influence of NH₄ OH on the improvement of GaN synthesis and the enhancement of its optical and structural properties. (author)