Journal
APPLIED PHYSICS EXPRESS
Volume 8, Issue 5, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.7567/APEX.8.055501
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- Japan Society for the Promotion of Science (JSPS) [25420307]
- Grants-in-Aid for Scientific Research [25420307] Funding Source: KAKEN
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The halide vapor phase epitaxy of alpha-Ga2O3 is demonstrated for the first time. The films are twin-free and heteroepitaxially grown on sapphire (0001) substrates using gallium chloride and oxygen as precursors. X-ray omega-2 theta and pole figure measurements reveal that the film is single-crystalline (0001) alpha-Ga2O3 with no detectable formation of beta-Ga2O3. The optical bandgap is determined to be 5.16 eV based on the transmittance spectrum. The growth rate monotonically increases with the partial pressures of the raw material gases, reaching approximately 150 mu m/h, which is over two orders of magnitude larger than those of conventional vapor phase epitaxial growth techniques, such as mist CVD or MBE. (C) 2015 The Japan Society of Applied Physics
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