Structural, optical and electrical properties of sulfur-incorporated amorphous carbon films

Kumari, Latha and Subramanyam, SV (2009) Structural, optical and electrical properties of sulfur-incorporated amorphous carbon films. In: Applied Physics A: Materials Science & Processing, 95 (2). pp. 343-349.

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Abstract

Amorphous carbon-sulfur (a-C:S) composite films were prepared by vapor phase pyrolysis technique. The structural changes in the a-C:S films were investigated by electron microscopy. A powder X-ray diffraction (XRD) study depicts the two-phase nature of a sulfur-incorporated a-C system. The optical bandgap energy shows a decreasing trend with an increase in the sulfur content and preparation temperature. This infers a sulfur incorporation and pyrolysis temperature induced reduction in structural disorder or increase in sp (2) or pi-sites. The presence of sulfur (S 2p) in the a-C:S sample is analyzed by the X-ray photoelectron spectroscopy (XPS). The sp (3)/sp (2) hybridization ratio is determined by using the XPS C 1s peak fitting, and the results confirm an increase in sp (2) hybrids with sulfur addition to a-C. The electrical resistivity variation in the films depends on both the sulfur concentration and the pyrolysis temperature.

Item Type:	Journal Article
Publication:	Applied Physics A: Materials Science & Processing
Publisher:	Springer
Additional Information:	Copyright of this article belongs to Springer.
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	13 Nov 2009 11:52
Last Modified:	16 Jan 2012 05:04
URI:	http://eprints.iisc.ac.in/id/eprint/19655

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