Studies on optical and photoluminescence properties of a-CNx thin films

Rahman, Z.A.; Ritikos, R.; Rahman, S.A. (2009) Studies on optical and photoluminescence properties of a-CNx thin films. Materials Research Innovations, 13 (3). pp. 168-170. ISSN 1432-8917

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Abstract

Amorphous carbon nitride (a-CNx) thin films of different thicknesses were deposited by radio frequency plasma enhanced chemical vapour deposition technique by varying the deposition times. The refractive index, film thickness and optical energy gap were obtained from the optical transmission spectrum of the film in visible wavelength region. The photoluminescence emission intensity and wavelength due to ultraviolet excitation were studied and analysed. The effects of deposition time and film thickness on these properties were investigated. The deposition rate decreased with increasing deposition time to a stable saturation value. The optical energy gap decreased with increasing film thickness which is attributed to increase in presence of sp(2) bonding clusters in the film structure. Photoluminescence emission intensity and wavelength also showed dependence on film thickness.

Item Type: Article
Creators:
  1. Rahman, Z.A.
  2. Ritikos, R.
  3. Rahman, S.A.(Department of Physics, Faculty of Science Building, University of Malaya, 50603 Kuala Lumpur, MALAYSIA)
Journal or Publication Title: Materials Research Innovations
Uncontrolled Keywords: Carbon nitride Optical properties Photoluminescence Deposition time carbon-nitride films dilution nitrogen behavior
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Dept of Physics
Depositing User: miss munirah saadom
Date Deposited: 16 Jul 2013 09:33
Last Modified: 02 Jan 2015 11:19
URI: http://eprints.um.edu.my/id/eprint/7379

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