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APPLIED PHYSICS LETTERS
Volume 96, Issue 20, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3422474
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We construct a phase diagram for silicon layer growth on (001) Si by hot-wire chemical vapor deposition (HWCVD), for rates from 10 to 150 nm/min and for substrate temperatures from 500 to 800 degrees C. Our results show that a mixed mono and dihydride surface termination during growth causes polycrystalline growth; some H-free sites are needed for epitaxy. For epitaxial films (T>620 degrees C), the dislocation density decreases with increasing growth temperature because of reduced O contamination of the surface. The best HWCVD epitaxial layers have dislocation densities of 10(5) cm(-2). (C) 2010 American Institute of Physics. [doi: 10.1063/1.3422474]
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