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- W2016905927 abstract "Boron doped hydrogenated amorphous carbon (a-C) thin films have been deposited by r.f.-plasma CVD with a frequency of 13.56 MHz at room temperature using pure methane as a precursor of carbon source mixed with hydrogen (H2) as a carrier gas. The films were prepared by varying the r.f. power, different flow rates of CH4, and partial pressure of mixed gas (CH4/H2) using solid boron as a target. The thickness, structural, bonding and optical properties of the as-deposited films were studied by Alpha step surface profiler, Raman, FT-IR, XPS and UV–visible spectroscopy. It was found that changing the deposition pressure in presence of solid boron dopant in the r.f. PECVD process has a profound effect on the properties of the deposited films, as evidenced from their Raman scattering and optical results. The grown p-C: B films were found very smooth and thickness in the range of 240 to 360 nm for 1 h deposition. Films deposited at lower pressure appear brownish color whereas those deposited at higher pressure appear pale yellowish. The as-deposited film is found to be dominated by sp2 rather than sp3, which might be due to the formation of small crystallites. The optical band gap is found to be reduced from 2.60∼1.58 eV as the partial pressure of CH4/H2 gas is reduced." @default.
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- W2016905927 date "2005-11-01" @default.
- W2016905927 modified "2023-09-27" @default.
- W2016905927 title "Boron doped amorphous carbon thin films grown by r.f. PECVD under different partial pressure" @default.
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- W2016905927 doi "https://doi.org/10.1016/j.diamond.2005.07.020" @default.
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