Abstract
Manganese sulphide (MnS) thin films have been deposited onto glass substrate by a low cost spray-pyrolysis technique at 220 degrees C. The as-deposited MnS thin films have been characterized using scanning electron microscopy (SEM), energy dispersive X-ray (EDX) spectroscopy, atomic force microscopy (AFM), X-ray diffraction, UV visible spectroscopy and photo electrochemical (PEC) measurement. The SEM and AFM images showed that the MnS thin films were well covered onto the substrate surface. The as-deposited raw thin film was found to be amorphous in nature and perfectly crystalline phase after annealing the sample. Optical band gap of the MnS thin films was found to vary from 3.1 to 3.21 eV and the band gap decreases with the increase in film thickness. Optical constants such as refractive index, extinction coefficient have been evaluated using reflectance and absorbance data. (C) 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim