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Titre: Electrodeposition of tin oxide thin film from nitric acid solution: the role of pH
Auteur(s): Daideche, K
Azizi, A
Mots-clés: SnO2
Carrier Concentration
Electrochemical Impedance Spectroscopy
Saturated Calomel Electrode
Date de publication: 30-jui-2018
Collection/Numéro: Journal of Materials Science: Materials in Electronics;Volume 28 Number 11
J Mater Sci: Mater Electron (2017) 28:8051-8060 DOI 10.1007/s10854-017-6511-8;
Publisher Name Springer US;
Résumé: Tin oxide (SnO2) thin films were synthesized by electrodeposition method from nitric acid medium with SnCl2 precursor and NaNO3 supporting electrolyte at 70 °C. The effect of pH electrolyte in the properties of SnO2 thin films was investigated. Cyclic voltammetry (CV) was utilized for the determination of the selective potential for electrodeposition of pure SnO2. Mott–Schottky (M–S) plots and electrochemical impedance spectroscopy (EIS) techniques were carried out to estimate the electrical characteristics of the SnO2 thin films deposited at different pH electrolytes. These latter techniques show n-type conductivity for all the samples with optimal carrier density of 8.41 × 1020/cm3 and high value of conductivity for the films electrodeposited at pH ~ 1.10. Atomic force microscopy (AFM) observations showed that the SnO2 thin films obtained at different pH are more homogenous in appearance and present lower surface roughnesses at lower pH value. Structural analysis of the SnO2 thin films was performed by X-ray diffraction (XRD) which exhibit a polycrystalline structure for pH ~ 1.25 and amorphous one for another pH values. From the optical study, the transmittance and the gap energy were founded to be depending to the pH of electrolyte.
URI/URL: http://dspace.univ-setif.dz:8888/jspui/handle/123456789/2520
ISSN: Print ISSN 0957-4522
Online ISSN 1573-482X
Collection(s) :Articles

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