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- W2894985001 abstract "Abstract Specular m-plane (10 1 ¯ 0) gallium nitride (m-GaN) epi-layer are grown on m-plane (10 1 ¯ 0) sapphire substrates by metal organic chemical vapor deposition using a three-step approach. A two-step approach was used to grow m-GaN buffer layer (BL), while a three-step approach was applied to improve the surface morphology of the top m-GaN epi-layer at high temperature. The three-step approach started with growing m-aluminum nitride nucleation layer with an optimized ammonia flux during the growth of aluminum nitride. Then the temperature was ramped up during the recrystallization step before the m-GaN BL deposition at low-temperature and the growth of m-GaN layer at high-temperature for the final step. Unexpectedly, when ammonia flow was intentionally halted during the recrystallization step, the surface morphology of the BL drastically changed from three- to two- dimensional with an abrupt cross-sectional structure. This in turn facilitated the complete coalescence of the m-GaN layer as revealed by field emission scanning electron microscopy. The three-step technique was found to affect the quality of m-GaN epi-layer as the samples exhibit improved crystallinity with X-ray diffraction rocking curves widths of 4680 and 1980 arcsec along the azimuth, perpendicular and parallel to [10 1 ¯ 0] directions, respectively." @default.
- W2894985001 created "2018-10-12" @default.
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- W2894985001 date "2018-12-01" @default.
- W2894985001 modified "2023-09-23" @default.
- W2894985001 title "Metal organic chemical vapor deposition of m-plane GaN epi-layer using a three-step approach towards enhanced surface morphology" @default.
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- W2894985001 doi "https://doi.org/10.1016/j.tsf.2018.09.052" @default.
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