Manganese Sulfide Thin Films Synthesis and Characterization

Manganese sulfide (MnS) thin films have attracted considerable attention for their semiconducting properties, thermal stability and potential in optoelectronic and energy‐conversion applications. Typical synthesis routes include chemical bath deposition, spray pyrolysis, successive ionic layer adsorption and reaction (SILAR), sputtering and pulsed‐laser deposition. Control of precursor concentration, substrate temperature and deposition time enables tuning of crystallinity, phase purity and film thickness. X‐ray diffraction studies consistently reveal a cubic (rocksalt) structure, with crystallite size and lattice strain varying according to growth parameters. Morphological features observed by scanning electron microscopy and atomic force microscopy indicate that grain size, surface roughness and porosity can be tailored for specific device architectures. Optical characterisation via ultraviolet–visible spectroscopy shows a direct band gap in the range 3.0–3.6 eV, modulated by film thickness and post‐deposition annealing. Electrical measurements of MnS films, and in particular heterostructures with n-type substrates, demonstrate diode‐like behaviour, tunable carrier concentration and controllable barrier heights. These combined properties position MnS thin films as promising candidates for photodetectors, photovoltaics, gas sensors and thin‐film transistors, emphasising the importance of reproducible synthesis and thorough structural and functional characterisation.

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Manganese Sulfide Thin Films Synthesis and Characterization publication trend

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Technical terms

Band gap: Energy difference between the valence band and the conduction band in a semiconductor, determining its optical absorption edge.

Chemical bath deposition (CBD): A solution‐based method in which substrates are immersed in a precursor bath to promote film growth at relatively low temperature.

Spray pyrolysis: A technique in which aerosolised precursors are thermally decomposed on a heated substrate to form thin films.

Heterojunction: An interface between two different semiconductor materials, often yielding rectifying behaviour when appropriately doped.

I–V characteristics: Current–voltage measurements used to determine conductivity, carrier transport mechanisms and device rectification.

C–V characteristics: Capacitance–voltage profiling employed to assess impurity distributions, depletion widths and barrier heights in semiconductor interfaces.

Cubic phase: A crystal structure in which atoms arrange in a face-centred cubic lattice, common to the rocksalt form of MnS.

Atomic force microscopy (AFM): A high-resolution imaging technique that maps surface topography by measuring forces between a sharp probe and the sample.

References

1. Synthesis and Characterization of Manganese Sulphide Thin Films by Chemical Bath Deposition Method. Acta Physica Polonica A (2017).
2. Electrical properties of heterostructures MnS/n-CdZnTe obtained by spray pyrolysis. Materials Research Express (2021).
3. Effect of Boric Acid Content on the Structural and Optical Properties of MnS Films Prepared by Spray Pyrolysis Technique. Acta Physica Polonica A (2014).