Preparation of nano-structured SnS thin films by chemical bath deposition method and investigating complexing agent on its properties

In this study, nanostructured SnS thin films were prepared using two complexing agents of ammonium acetate and hexamethylenetetramine (HMTA) by chemical bath deposition method on the glass andpolyethylene terephthalate (PET) substrate. The effect of complexing agents on surface morphology, structure, optical properties and particle size of the films were investigated by various techniques. The FE-SEM images of the samples showed that the SnS nanoparticles were coated as dense and homogenous on the substrate. The XRD results indicated that the SnS thin films well-crystallized and had orthorhombic crystal structure. The energy gap values of the films varied from 1.06 to 1.07 eV. The results of ultraviolet-visible spectrum of the samples showed that the SnS films had low transmittance values in the visible region, therefore they can be used as an absorber layer in the solar cells.