The influence of solution temperature of SnS thin films grown by successive ionic layer adsorption and reaction (SILAR) method

Abstract

Tin sulfide is a promising optoelectronic material, which has a particular interest due to its absorption coefficient, direct (indirect) bandgap and its non-toxic components. SnS thin films were deposited on glass substrates by SILAR (Successive Ionic Layer Adsorption and Reaction) method at different solutions temperatureand it is rarely developed by this parameter. The cationic (SnCl2.2H2O) and anionic (Na2S.9H2O) solutions were used as precursors materials. The structure, films composition, morphology, and optical properties were investigated by using X-ray diffraction, Raman spectroscopy, energy dispersive X-ray analysis, Scanning electron microscopy (SEM) and spectrophotometer. X-ray diffraction (XRD) patterns indicated that the deposited SnS thin films have an orthorhombic crystal structure. Raman spectroscopy confirmed the presence of the SnS phase. Uniform deposition of the material over the entire glass substrate was showed by Scanning electron microscopy (SEM). The optical band gap energy was found between 1.6 and 1.85 eV.