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Use of chlorinated carbon and silicon precursors for epitaxial growth of 4H‐SiC at very high growth rates
Author(s) -
Kotamraju Siva,
Krishnan Bharat,
Koshka Yaroslav
Publication year - 2009
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.200903149
Subject(s) - nucleation , epitaxy , photoluminescence , silicon , materials science , silicon tetrachloride , growth rate , luminescence , carbon fibers , chemical engineering , homogeneous , analytical chemistry (journal) , chemistry , nanotechnology , optoelectronics , composite material , organic chemistry , thermodynamics , geometry , mathematics , physics , layer (electronics) , composite number , engineering
Abstract A possibility to apply the advantages of chlorinated carbon precursors, which had been previously used in low‐temperature epitaxial growth of 4H‐SiC, to achieve very high growth rates at higher growth temperatures was investigated. Silicon tetrachloride was used as the silicon precursor to suppress gas‐phase homogeneous nucleation. The temperature increase from 1300 °C (which is the temperature of the previously reported low‐temperature halo‐carbon epitaxial growth) to 1600 °C enabled an increase of the precursor flow rates and consequently of the growth rate from 5 to more than 100 μm/h without morphology degradation. High quality of the epilayers was confirmed by low‐temperature photoluminescence spectroscopy and time‐resolved luminescence. No evidences of homogeneous nucleation were detected, however, liquid Si droplet formation on the epilayer surface seems to remain a bottleneck at very high growth rate. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)