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

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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)

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.

Suggested Citation

  • Soumia Belhamri & Nasr-Eddine Hamdadou, 2018. "IMPROVED PROPERTIES OF SnO2 THIN FILMS OBTAINED VIA SPIN COATING METHOD BY VARYING THE SOLUTION CONCENTRATION," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 25(04), pages 1-9, June.
    • Handle: RePEc:wsi:srlxxx:v:25:y:2018:i:04:n:s0218625x18500920
    DOI: 10.1142/S0218625X18500920
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    Keywords

    Thin films; SnO2; spin coating; XRD; AFM; optical properties;
    All these keywords.

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