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<p>In the past decade, tin disulfide (SnS<sub>2</sub>) has gained significant attention due to its diverse applications, including solar cells, optoelectronic devices, and UV photodetectors. In this study, SnS<sub>2</sub> thin films were deposited on glass substrates via spray pyrolysis with 300°C as the substrate temperature. This work investigates the physical properties and photoconductive response of the obtained film. X-ray diffraction revealed a hexagonal polycrystalline structure with an average crystallite size of approximately 15&#xa0;nm. Morphological study revealed that the film surface appears irregular, with significant porosity, with a grain size around 10&#xa0;<i>μ</i>m. Chemical analysis via energy-dispersive spectroscopy confirmed the presence of both tin and sulfur with an atomic ratio close to 0.73. UV-visible and NIR spectroscopy measurements indicated that the optical transmittance exceeded 75% in the visible and near-IR regions, with a band gap of 3.18&#xa0;eV and a refractive index of 2.6, making the films suitable for solar cell applications. Additionally, photoconductivity studies showed that photocurrent versus light intensity follows a power law, while polarization follows a linear trend. The responsivity ranged from 0.005&#xa0;<i>μ</i>AW<sup>−1</sup>&#xa0;cm<sup>−2</sup> under white light to 0.76&#xa0;<i>μ</i>AW<sup>−1</sup>&#xa0;cm<sup>−2</sup> under UV illumination, with detectivity increasing from 2 10<sup>6</sup> to 2.14 10<sup>8</sup> johns. These findings suggest that SnS<sub>2</sub> layers are promising candidates for UV photodetectors.</p>

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Spray-Pyrolyzed Tin Disulfide (SnS2) Thin Film: A Promising Approach for both Visible and UV Detection Applications

  • 期刊论文

  • 发表日期：

    2025年5月6日

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  • M. Louhichi,
  • R. Souissi,
  • A. Alaya,
  • M. Toumi,
  • B. Tiss,
  • A. Ben Haj Amara,
  • N. Bouguila,
  • S. Alaya

摘要

In the past decade, tin disulfide (SnS2) has gained significant attention due to its diverse applications, including solar cells, optoelectronic devices, and UV photodetectors. In this study, SnS2 thin films were deposited on glass substrates via spray pyrolysis with 300°C as the substrate temperature. This work investigates the physical properties and photoconductive response of the obtained film. X-ray diffraction revealed a hexagonal polycrystalline structure with an average crystallite size of approximately 15 nm. Morphological study revealed that the film surface appears irregular, with significant porosity, with a grain size around 10 μm. Chemical analysis via energy-dispersive spectroscopy confirmed the presence of both tin and sulfur with an atomic ratio close to 0.73. UV-visible and NIR spectroscopy measurements indicated that the optical transmittance exceeded 75% in the visible and near-IR regions, with a band gap of 3.18 eV and a refractive index of 2.6, making the films suitable for solar cell applications. Additionally, photoconductivity studies showed that photocurrent versus light intensity follows a power law, while polarization follows a linear trend. The responsivity ranged from 0.005 μAW−1 cm−2 under white light to 0.76 μAW−1 cm−2 under UV illumination, with detectivity increasing from 2 106 to 2.14 108 johns. These findings suggest that SnS2 layers are promising candidates for UV photodetectors.