Effect of pH enhancer on Some Physical Properties of CB Deposited MNS Thin Films

Abstract

Physical and optical properties of chemical bath deposited MnS thin films were studied. The physical properties such as variation of thickness, variation of transmittance and variation of optical band gap have been investigated. The concentration of pH enhancer of the precursor effectively tuned the physical and optical properties of the deposited MnS thin films. The film prepared using 12 ml of 7M (NH3OH) exhibits maximum band gap 3.75 eV. Thickness of the MnS films was observed decreased with increasing concentration of 7M (NH3OH). It was found that increasing pH enhancer concentration the blue shifting of absorption edge increased.
Key Words: Chemical bath deposition; MnS thin films; Optical Properties