Nitrogen Effects on Optical and Electrical Properties of Amorphous Carbon

Abstract:

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Optical and electrical properties amorphous carbon nitride (a-CN) has been investigated on films deposited by reactive R.F. sputtering source with a graphite target. The amorphous carbon nitride samples were prepared under a gas mixture of nitrogen (N2) and /or Argon (Ar).The optical transitions are governed by the  and * electronic state distributions, related to sp2- and sp1-hybridized C and N atoms. Specific lonepair electronic states arise from groups (CN) with sp1-hybridized C atoms, which may form C≡N triple bonds or —N=C=N— longer chains. Photoluminescence spectra show a maximum around 650 nm. Two conduction regimes at high and low temperature are found in a-CN samples. The corresponding activation energies decrease with the increase of target voltage.

Info:

Periodical:

Materials Science Forum (Volumes 636-637)

Edited by:

Luís Guerra ROSA and Fernanda MARGARIDO

Pages:

423-429

DOI:

10.4028/www.scientific.net/MSF.636-637.423

Citation:

M. Fathallah et al., "Nitrogen Effects on Optical and Electrical Properties of Amorphous Carbon", Materials Science Forum, Vols. 636-637, pp. 423-429, 2010

Online since:

January 2010

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$35.00

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