Abstract
ABSTRACTHigh-quality epitaxial Si1-x-yGexCy layers were grown on Si by rapid thermal chemical vapor deposition. Schottky diodes of TiW/SiGeC were fabricated using conventional Si processes. I-V and C-V measurements were performed to assess effects of crystal defects in the alloy on the electrical properties. For defective SiGeC films due to non-substitutional carbon, high series resistance and additional tunneling current were measured under forward bias, as well as leakage current under reverse bias. A transport mechanism of deep generation/recombination centers formed by carbon complexes is proposed to explain the I-V characteristics.
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