期刊
APPLIED PHYSICS LETTERS
卷 101, 期 25, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4772986
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资金
- National Science Council of Taiwan [NSC-97-2221-E-002-231-MY3]
The electrical performance of SiC-based devices is strongly affected by the border traps of high-k dielectrics and carbon (C) interstitials in SiC. The abrupt HfO2/SiC junction exhibits frequency dispersion in capacitance-voltage (C-V) curves. The thin SiO2 (7.5 nm) sample that is without excess C clusters exhibits ideal C-V characteristics. With the increase of SiO2 thickness, excess C in SiC substrates is detected by using both auger electron spectroscopy and x-ray photoelectron spectroscopy. The thick SiO2 (15.5 nm) sample contains enormous excess C inside SiC close to SiO2 interface, and excess C changes the substrates to n(+)-like behavior. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4772986]
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