en گروه فیزیکی و عملیات حرارتی Characterization of Physical and Thermal Properties of Materials Research Paper Research Paper <div style="text-align: justify;">Thin films of SnS₂ were prepared, as the absorber layer in solar cells, using an aqueous solution of SnCl₄ and thiourea by spray pyrolysis technique. Effect of the Substrate temperature on the properties of these thin films was studied. Investigation via XRD showed the formation of polycrystalline SnS₂ along (001) in all layers; there was no sign of other unwanted phases. With increasing of substrate temperature from 325 to 400 ⁰C, the crystallinity of the sample was improved, after that, it deteriorated the crystallinity. Layers had granular morphology and Valley- Hills topography. UV-VIS spectra revealed that the transmittance of all layers was lower than 40% in the visible region and the band gap reduced from 2.8 to 2.55 eV with increment in temperature from 350 to 400 ⁰C. Photoluminescence spectra of the prepared film, which was formed at 400 ⁰C showed a dominant peak at 530 nm, caused recombination of excitons. The least electrical resistivity of the SnS₂ thin film prepared at 400 ⁰C in dark and light environment were 4.6 &times;10 ^-3&Omega;cm and 0.65&times;10 ^-3&Omega;cm, respectively; which demonstrated 400 ⁰C was the optimum temperature in point of optoelectrical properties in the SnS₂ thin film.<br> &nbsp;</div> Spray pyrolysis, Chalcogenide, Thin films, Tin disulfide 43 52 http://ijmse.iust.ac.ir/browse.php?a_code=A-10-1548-1&slc_lang=en&sid=1 M. Taleblou m.i.taleblou@gmail.com 1800319475328460010339 1800319475328460010339 No Semnan University E. Borhani e.borhani@semnan.ac.ir 1800319475328460010340 1800319475328460010340 Yes Semnan University B. Yarmand byarmand@merc.ac.ir 1800319475328460010341 1800319475328460010341 No Materials and Energy Research Center A. Kolahi arkolahi@yahoo.com 1800319475328460010342 1800319475328460010342 No Materials and Energy Research Center