Kumari, Latha ; Subramanyam, S. V. (2009) Structural, optical and electrical properties of sulfur-incorporated amorphous carbon films Applied Physics A: Materials Science & Processing, 95 (2). pp. 343-349. ISSN 0947-8396
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Official URL: http://www.springerlink.com/content/u7n127k9713701...
Related URL: http://dx.doi.org/10.1007/s00339-008-4902-7
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 sp2 or π-sites. The presence of sulfur (S 2p) in the a-C:S sample is analyzed by the X-ray photoelectron spectroscopy (XPS). The sp3/sp2 hybridization ratio is determined by using the XPS C 1s peak fitting, and the results confirm an increase in sp2 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: | Article |
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Source: | Copyright of this article belongs to Springer. |
ID Code: | 51442 |
Deposited On: | 28 Jul 2011 11:42 |
Last Modified: | 28 Jul 2011 11:42 |
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