Abstract
In this work, beta-SnS2 thin films have been prepared on glass substrates by the spray pyrolysis technique using an alcohol solution which contains tin chloride (SnCl4) and thiourea (SC(NH2)(2)) as precursors. The structural study shows that beta-SnS2. thin film prepared using optimal experimental conditions: substrate temperature T-s = 280 degrees C and the concentration ratio of sulfur and tin elements in the spray solution x = [S]/[Sn] = 2.5, crystallizes in the hexagonal phase with a strong(0 0 1) X-ray diffraction line. In the same way, microprobe analyses (EPMA) as well as X-ray photoelectron spectroscopy (XPS) show the presence of undiserable phase of SnO2. From the transmission and reflectance spectra, the band gap energy is 2.65 eV. On the other hand, the photothermal properties of such films have been studied, the thermal conductivity was K-c = 0.85 Wm(-1) K-1 and the thermal diffusivity was D-c = 14.5 x 10(-6) m(2) s(-1). The analysis of beta-SnS2 thin films via the photodeflection spectroscopy including the effect of the inhomogeneity at the surface (roughness) and in the bulk (air inclusion, secondary phase of SnO2) have been discussed for future investigations. (C) 2008 Elsevier B.V. All rights reserved.