Investigation of structural, optical and electrical properties of MnS thin films obtained using Tri sodyum citrate in different concentrations

In this study, γ-MnS thin films were obtained on glass substrates by Chemical Bath Deposition (CBD) method using 0.5 M, 1 M, 1.5 M Tri-Sodium Citrate at 40 0C. The structural, optical and electrical properties of the films obtained depending on the Tri-Sodium Citrate concentration were examined. Optical transmittance values of γ-MnS thin films at room temperature were measured in the range of 300-1100 nm using UV-visible spectrophotometer. Accordingly, the average transmission were measured as 71%, 64% and 61% depending on the concentration of 0.5, 1, 1.5 M TSS in the visible region (400-700 nm). In addition, reflection value (R) and optical constants such as absorption coefficient (α), extinction coefficient (k), refractive index (n), real (ε1) and imaginary (ε2) part of the dielectric constant and energy band gap (Eg) of films were calculated. Structural characterization of films was performed using X-ray Diffraction (XRD), Scanning Electron Microscope (FE-SEM), Energy Dispersive X-ray (EDAX) and electrical characterization using Hall Measurement System. It was observed that the film obtained by using 0.5 M TSS was formed in amorphous structure, and the crystallinity of the films that crystallized in hexagonal structure along the c axis in the (002) plane increased due to the increase in TSS concentration. The films showed n-type properties and their electrical resistivity was measured as 10.03x105, 9.6x105 and 4.1x105 (Ωcm) depending on the increase in TSS concentration. KeyWords:Chemical Bath Deposition, MnS Thin Film, Tri Sodium Citrate, Optical Properties, Structural Properties, Electrical Properties