Bath Temperature Effects On Optical Measurement Of Silver Sulfide Thin Films Synthesized By Chemical Bath Deposition Technique

Abstract

Silver sulfide (Ag₂S) thin films were deposited on glass substrates by chemical bath deposition technique. The depositions were carried out at two different temperatures 300K and 373K. The films were characterized for optical properties using the spectrophotometer. The optical absorption spectra show that all the films exhibited a high transmittance in the visible and near infrared regions of electromagnetic spectrum and, as a result can be used as window coating for the people living in the cold part of the world. The deposited Ag₂S films exhibited the direct band gap energy of 1.10eV and 1.52eV. The band gap energy decreases as the bath temperature increases. This range of band gap values makes the Ag₂S films suitable for solar fabrication.