IMPROVED PROPERTIES OF SnO2 THIN FILMS OBTAINED VIA SPIN COATING METHOD BY VARYING THE SOLUTION CONCENTRATION

Soumia Belhamri () and Nasr-Eddine Hamdadou
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Soumia Belhamri: Laboratoire de Micro et de Nanophysique (LaMiN), Ecole Nationale Polytechnique d’Oran (ENPOran), BP 1523 El Mnaouer, Oran 31000, Algérie
Nasr-Eddine Hamdadou: Laboratoire de Micro et de Nanophysique (LaMiN), Ecole Nationale Polytechnique d’Oran (ENPOran), BP 1523 El Mnaouer, Oran 31000, Algérie

Surface Review and Letters (SRL), 2018, vol. 25, issue 04, 1-9

Abstract: The aim of this work is to study the solution concentration effect on the SnO2 thin film properties, which were deposited on glass substrates by spin coating technique and annealed for one hour at 500∘C. X-ray diffraction (XRD) spectra show that the films deposited at various solution concentrations (0.5mol/L, 0.7mol/L and 1mol/L) are polycrystalline with a tetragonal rutile type. Grains have two preferred orientations along the directions (110) and (101) corresponding to 2θ equal to 26.74∘ and 34.11∘, respectively. We have also noted that the grain size changes between 109nm and 178nm. However, the film coated at 10 deposition cycles and 0.7mol/L solution concentration has a minimum arithmetic average roughness of 0.376 nm. The optical transmittance of the films in the visible spectrum was in the range of 77–84% and the optical band gap gradually decreases with the decrease of the solution concentration from 4.11eV to 3.56eV.

Keywords: Thin films; SnO2; spin coating; XRD; AFM; optical properties (search for similar items in EconPapers)
Date: 2018
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DOI: 10.1142/S0218625X18500920

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