Abstract
In this paper, first time we report the precursor solution concentration with EDTA induced change in physical properties of MnS thin films deposited by a simple and facile approach called nebulized spray pyrolysis technique. X-ray diffraction results are revealed the presence of both β-MnS (cubic) and γ-MnS (hexagonal) structures in the deposited films. The crack-free, uniform, and homogeneously distributed particles with netted surface was realized from the HRSEM study. It is evident from the XPS data that the existence of Mn2+ and S2− in the deposited films. The optical band gap value of MnS films varies from 2.83eV to 3.25eV, which attributes the absorption edge shifts toward lower energy region with an increase of carrier density. Photoluminescence study shows the presence of strong band edge emission at 422nm, which indicates the high optical quality of deposited films. The Raman spectra show two peaks at 367cm−1 and 647cm−1 which corresponds to the Mn-S vibrations.
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