Abstract
Tin disulfide beta-SnS2 thin films have been prepared on pyrex substrates by the spray pyrolysis technique using tin tetrachloride and thiourea as starting materials. The depositions were carried out in the range of substrate temperatures from 240 to 400 degrees C. Highly c-axis oriented beta-SnS2 films, having a strong (001) X-ray diffraction line are obtained at temperature 280 degrees C and using concentration ratio in solution R = [S]/[Sn] = 2.5. Films surfaces were analyzed by contact Atomic Force Microscopy (AFM) and by Scanning Electron Microscopy (SEM) in order to understand the effect of the deposited temperature on the surface structure. On the other hand, from transmission and reflection spectra, the band gap energy determined is about 2.71 eV. Finally using the photodeflection spectroscopy technique, the thermal conductivity K-c and diffusivity D-c were obtained. Their values are 10 Wm(-1)K(-1) and 10(-5) m(2)s(-1) respectively.