Abstract
AbstractLow-temperature growth of nano-crystalline silicon film and silicon nanorods by hot-wire chemical vapor deposition (HWCVD) using SiCl4/H2 gases are reported here. Nano-crystalline silicon films were deposited at a filament temperature of 1800°C, SiCl4/H2 flow rate ratio of 8/37 sccm and a substrate temperature of 150°C. The volume fraction of the crystallinity of the film characterized by Raman spectroscopy is 82%. The TEM analysis reveals that the average size of nano-crystalline silicon film is 5nm. Silicon nanorods with an average diameter of 80 nm were obtained as the SiCl4/H2 flow rate ratio was reduced to 5/30 sccm at substrate temperatures lower than 200°C. TEM analyses reveal that Si nanocrystals are embedded in an amorphous nanorods with fish-born like structure.
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