Growth of Bulk AlN and GaN Single Crystals by Sublimation
- 1 January 1996
- journal article
- Published by Springer Nature in MRS Proceedings
Abstract
Single crystals of A1N to 1 mm thickness were grown in the range 1950-2250°C on 10×10 mm2 α(6H)-SiC(0001) substrates via sublimation-recondensation method. Hot pressed polycrystalline AlN was used as the source material. The color varied from transparent to dark green/blue. The crystal morphology varied with growth conditions. Most crystals were 0.3 mm -1 mm thick transparent layers which completely covered the substrates. Raman, optical and transmission electron microscopy (TEM) results are presented. Single crystals of gallium nitride (GaN) were also grown by subliming powders of this material under an ammonia (NH3) flow. Optical microscopy, Raman and photoluminescence results are shown.Keywords
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