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Characterization of Cobalt Sulfide Thin Films Synthesized from Acidic Chemical Baths
Joint Authors
Abza, Tizazu
Dadi, Dereje Gelanu
Hone, Fekadu Gashaw
Meharu, Tesfaye Chebelew
Tekle, Gebremeskel
Abebe, Eyobe Belew
Ahmed, Kalid Seid
Source
Advances in Materials Science and Engineering
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-04-30
Country of Publication
Egypt
No. of Pages
9
Abstract EN
Cobalt sulfide thin films were synthesized from acidic chemical baths by varying the deposition time.
The powder X-ray diffraction studies indicated that there are hexagonal CoS, face-centered cubic Co3S4, and cubic Co9S8 phases of cobalt sulfide.
The crystallite size of the hexagonal CoS phase decreased from 52.8 nm to 22.5 nm and that of the cubic Co9S8 phase increased from 11 nm to 60 nm as the deposition time increased from 2 hrs to 3.5 hrs.
The scanning electron microscopic images revealed crack and pinhole free thin films with uniform and smooth background and few large polygonal grains on the surface.
The band gap of the cobalt sulfide thin films decreased from 1.75 eV to 1.3 eV as the deposition time increased from 2 hrs to 3.5 hrs.
The photoluminescence (PL) spectra of the films confirmed the emission of ultraviolet, violet, and blue lights.
The intense PL emission of violet light at 384 nm had red shifted with increasing deposition time that could be resulted from the increase in the average crystallite size.
The FTIR spectra of the films indicated the presence of OH, C-O-H, C-O, double sulfide, and Co-S groups.
As the deposition time increased, the electrical resistivity of the cobalt sulfide thin films decreased due to the increase in both the crystallite size and the films’ thickness.
American Psychological Association (APA)
Abza, Tizazu& Dadi, Dereje Gelanu& Hone, Fekadu Gashaw& Meharu, Tesfaye Chebelew& Tekle, Gebremeskel& Abebe, Eyobe Belew…[et al.]. 2020. Characterization of Cobalt Sulfide Thin Films Synthesized from Acidic Chemical Baths. Advances in Materials Science and Engineering،Vol. 2020, no. 2020, pp.1-9.
https://search.emarefa.net/detail/BIM-1128048
Modern Language Association (MLA)
Abza, Tizazu…[et al.]. Characterization of Cobalt Sulfide Thin Films Synthesized from Acidic Chemical Baths. Advances in Materials Science and Engineering No. 2020 (2020), pp.1-9.
https://search.emarefa.net/detail/BIM-1128048
American Medical Association (AMA)
Abza, Tizazu& Dadi, Dereje Gelanu& Hone, Fekadu Gashaw& Meharu, Tesfaye Chebelew& Tekle, Gebremeskel& Abebe, Eyobe Belew…[et al.]. Characterization of Cobalt Sulfide Thin Films Synthesized from Acidic Chemical Baths. Advances in Materials Science and Engineering. 2020. Vol. 2020, no. 2020, pp.1-9.
https://search.emarefa.net/detail/BIM-1128048
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1128048