Microstructure and opto-electrical properties of SnO₂:In₂O₃ alloys thin films prepared by ultrasonic spray
by Fayssal Ynineb; Abdelkader Hafdallah; Nadhir Attaf; Mohammed Salah Aida; Jamal Bougdira; Hervé Rinnert
International Journal of Nanoparticles (IJNP), Vol. 6, No. 2/3, 2013

Abstract: In this work, we study the effect of indium weight ratio in solution: R = [In/Sn] on the properties of SnO₂:In₂O₃ thin films prepared by ultrasonic spray method at fixed temperature of 300°C. The used precursors are tin chloride dehydrate and indium trichloride dissolved in methanol. To prepare hybrid SnO₂:In₂O₃ thin films with different concentrations, the ratio R is varied in the range of 10-95 wt%. The resulting films were characterised by X-ray diffraction, scanning electron microscopy analysis, UV-visible spectrophotometer and conductivity measurement. The XRD results indicate segregation between SnO₂ and In₂O₃ phases in all films. The optical transmittance is in the range of [75-85]%. The conductivity values of pure oxides are very low [∼10⁻³ (Φ.cm)⁻¹] and it is increased with R ratio until a maximum value of 1.2 × 102 (Φ.cm)⁻¹ obtained at R = 95 wt%. Consequently, the higher figure of merit (Fm = σ.T.d) is obtained at this later ratio.

Online publication date: Mon, 31-Mar-2014

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