Analysis on electrical and optical properties of nitrogen incorporated amorphous carbon prepared by aerosol-assisted CVD method

We have successfully deposit the a-C and nitrogen doped a-C (a-C:N) using the custom-made Aerosol-assisted CVD (AACVD). Natural precursor, camphor oil (C₁₀H₁₆O) was selected as the carbon source. The electrical and optical properties were characterized by BUKOH KEIKI CEP2000 solar simulator system and Perkin Elmer LAMBDA 750 UV-vis-NIR spectroscope respectively. Five samples were prepared for the a-C and a-C: N respectively, with the deposition temperatures ranging from 400°C to 600°C. An ohmic contact was acquired between the carbon/metal configurations from the current-voltage solar simulator system. Higher conductivity at a-C: N, ~x10^-2 Scm^-1 is due to the decrease in defects since the spin density gap decrease with the nitrogen addition. Pure a-C exhibit absorption coefficient, a of 10 cm^-1, whereas for a-C:N, a is of 10 cm^-1. The high σ value is at a-C:N is due to the presence of more graphitic component (sp² carbon bonding) in the carbon films.