Proceedings of International Conference on Applied Innovation in IT
2025/06/27, Volume 13, Issue 2, pp.427-435
Physical Properties and Sensing Properties of Iron (II) Ion-Doped Zinc Sulfide Nanostructured Thin Films Deposited via Chemical Spray Pyrolysis
Zainab Al-Ramadhan, Raghad Hamdan Mohsin, Abeer Ghalib Hadi, Shaymaa A. Hussein, Sami Salman Chiad, Nadir Fadhil Habubi and Yassin Hasan Kadhim Abstract: Nanostructured thin films of Iron (Fe)-doped Zinc Sulfide (ZnS) were deposit via Chemical Spray Pyrolysis (CSP) technique, with varying concentrations of Iron incorporated into the ZnS matrix. XRD analysis assure that all films maintained a zinc blende cubic structure. The average crystallite size was calculated to be 13.25 nm for pure ZnS and increased slightly to 14.8 nm upon Fe doping. The structural analysis also explored the effect of Iron incorporation on lattice parameters, microstrain, and dislocation density, revealing noticeable changes in crystal quality. AFM) was employed to assess surface topography, indicating a relatively uniform morphology. Optical properties were investigated using UV-Visible spectroscopy, showing modifications in band gap energies with increasing Fe concentration, suggesting Fe ions successfully substituted Zn sites. Gas sensing performance toward NO₂ at 125°C revealed that Fe doping reduced sensitivity, although thinner films demonstrated enhanced responsiveness due to increased surface-to-volume ratio and active interaction sites.
Keywords: ZnS, Fe, Thin Films, XRD, AFM, Optical Properties, Bandgap.
DOI: 10.25673/120514
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