Effect of Annealing Temperature on Structural and Optical Properties of Cobalt Oxide Thin Films Prepared by Electrostatic Spray Deposition Technique

Abstract:

In this work, cobalt oxide thin films were prepared by electrostatic spray deposition (ESD) technique on glass substrate. The influence of the annealing temperature on properties of cobalt oxide film was investigated. The structural, optical and morphology of cobalt oxide thin films were characterized by X-ray diffraction (XRD), Raman spectroscopy, UV-Visible spectrophotometer, scanning electron microscope, respectively. The crystalline parameters such as crystalline size of films can be obtained from XRD spectra. Phase transformation due to the different annealing temperature in cobalt oxide film has been observed. Moreover, at the higher annealing temperature, the optical band gap in cobalt oxide films were shifted to lower value due to the change in crystalline size and the defect sites in films.

• Periodical: Key Engineering Materials (Volumes 675-676)
• Pages: 229-232
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.675-676.229
• Online since: January 2016
• Authors: Kasidid Chansaengsri, Korakot Onlaor, Thutiyaporn Thiwawong, Benchapol Tunhoo*
• Keywords: Cobalt Oxide, Optical Property, Thin Films

References

[1] Y. Sun, C. Du, X.Y. Feng, Y. Yu, I. Lieberwirth, C.H. Chen, Electrostatic spray deposition of nanoporous CoO/Co composite thin films as anode materials for lithium-ion batteries, Applied Surface Science. 259 (2012) 769– 773.

DOI: 10.1016/j.apsusc.2012.07.119

[2] K.K. Purushothaman, B. Sethuraman, M.P. Anupama, M. Dhanasankar, G. Muralidharan, Optical, structural, and electrochromic properties of cobalt oxide films prepared via the sol–gel route, Materials Science in Semiconductor Processing. 16 (2013).

DOI: 10.1016/j.mssp.2013.04.023

[3] R. Drasovean, R. Monteiro, E. Fortunato, V. Musat, Optical properties of cobalt oxide films by a dipping sol–gel process, Journal of Non-Crystalline Solids. 352 (2006) 1479–1485.

DOI: 10.1016/j.jnoncrysol.2006.02.036

[4] N.A. M. Barakat, M.S. Khil, Faheem A. Sheikh, H.Y. Kim, Synthesis and optical properties of two cobalt oxides (CoO and Co3O4) nanofibers produced by electrospinning process, J. Phys. Chem. C. 112 (2008) 12225-12233.

DOI: 10.1021/jp8027353

[5] E. Kim, Z.T. Jiang, K. No, Measurement and calculation of optical band Gap of chromium aluminium oxide films, Jpn. J. Appl. Phys. 39 (2000) 4820-4825.

DOI: 10.1143/jjap.39.4820

[6] S. Ilican, M. Caglar, Y. Caglar, The effect of deposition parameters on the physical properties of CdxZn1-xS films deposited by spray pyrolysis method, Journal of Optoelectronics and Advanced Materials. 9 (2007) 1414-1417.

DOI: 10.1016/j.optcom.2007.11.031

[7] A. Tumuluri, K Lakshun Naidu, K.C. James Raju, Band gap determination using Tauc's plot for LiNbO3 thin films, International Journal of Chem Tech Research. 6 (2014) 3353-3356.

[8] M.O. Dawood, Effect of Cu-doping on Urbach energy and dispersion parameters of Cu: NiO film deposited by CSP, International Letters of Chemistry, Physics and Astronomy. 48 (2015) 138-145.

DOI: 10.18052/www.scipress.com/ilcpa.48.138