Abstract
Sulfosalt Sn2Sb2S5 thin films could be used as a potential candidate in many technological applications such as photovoltaic solar cells due to its near ideal band gap, high absorption coefficient. Sn2Sb2S5 thin films were deposited on heated glass substrates by the thermal vacuum evaporation technique. Here we investigate the effect of both substrate temperature (T-s) and annealing process on the structural, morphological and optical properties of these thin films. As the substrate temperature increases and after annealing under air atmosphere the average grain size increases from 103 to 212 angstrom. Atomic force microscopy study of such films shows a low surface roughness of about 2 nm. Absorption coefficients higher than 10(4) cm(-1) were found.