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K. DAKHSI1,2, S. ELFARRASS2,3, B. HARTITI2, M. EBNTOUHAMI1, A.RIDAH3, P. THEVENIN4
- Laboratory of Electrochemistry Corrosion and Environment, Department of Chemistry, University Ibn Tofail, FS. Kenitra, Morocco
- Laboratory of Materials Physics and Applications of Renewable Energy, University Hassan II, Morocco FSTM Mohammadia, Morocco
- Laboratory LEAMCM Faculty of Science ben m'sik, University Hassan II, Morocco
- Laboratory LMOPS, University of Lorraine, Metz, France
Transparent conducting oxides (TCOs) are widely used as electrodes in optoelectronic devices due to their optical transparency in the visible range and to their electrical conductivity. They can be found in various applications such as photovoltaic solar cells, liquid crystal displays, sensors and organic light emitting devices. Indium tin oxide (ITO) and zinc oxide (ZnO) are the two major TCO materials to be used. In our case, we have deposited Zinc oxide onto pyrex substrates by Spray Pyrolysis technique at temperatures ranging from 350 to 450°C by step of 25°C. The structural properties of the films were studied by X-Ray diffraction (XRD) and confirmed by selected area electron diffraction (SAED) mode. Surface morphology of ZnO thin films was analyzed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The films appear to be composed of ZnO nanoparticles (ZnO NPs), whom size increases with temperature. The results showed the presence of the wurtzite phase of ZnO with an orientation along the c-axis of the crystallites. Morphology images of the films obtained by Scanning electron microscopy revealed that pure ZnO film grew as quasi-aligned hexagonal shaped microrods with diameters varying between 100 and 400 nm. UV- visible spectroscopy measurements were also performed to determine the optical band gap..
ZnO, Thin films, Spray pyrolysis, XRD, SEM, TEM, UV- visible spectroscopy.
Submitted at: Sept. 28, 2013
Accepted at: Nov. 7, 2013
K. DAKHSI, S. ELFARRASS, B. HARTITI, M. EBNTOUHAMI, A.RIDAH, P. THEVENIN, Contribution to the study of ZnO films properties prepared by spray pyrolysis, Journal of Optoelectronics and Advanced Materials Vol. 15, Iss. 11-12, pp. 1217-1221 (2013)
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