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GaN substrate and GaN homo-epitaxy for LEDs: Progress and challenges

Noticias

GaN substrate and GaN homo-epitaxy for LEDs: Progress and challenges

2019-07-03

After a brief review on the progresses in GaN substrates by ammonothermal method and Na-flux method and hydride vapor phase epitaxy (HVPE) technology, our research results of growing GaN thick layer by a gas flow-modulated HVPE, removing the GaN layer through an efficient self-separation process from sapphire substrate, and modifying the uniformity of multiple wafer growth are presented. The effects of surface morphology and defect behaviors on the GaN homo-epitaxial growth on free standing substrate are also discussed, and by the advances of LEDs on GaN substrates and prospects of their applications in solid state lighting.


Source:IOPscience

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