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<p>Tin selenide (SnSe) thin films were co-electrodeposited onto ITO/glass substrates from an aqueous solution containing tin(II) dichloride (SnCl<sub>2</sub>) and selenium dioxide (SeO<sub>2</sub>) as precursors, with ethylene diamine tetra-acetic acid (EDTA) as a complexing agent at 50&#xa0;°C. The electrochemical behavior and co-deposition potentials of Sn, Se, and SnSe were analyzed using cyclic voltammetry. The influence of deposition potential on the structural, morphological, compositional, and optical properties of SnSe films was examined through X-ray diffraction, Raman spectroscopy, scanning electron microscopy, energy-dispersive X-ray spectroscopy, diffuse reflectance spectroscopy, and UV-Vis-NIR spectroscopy. The films consist of randomly arranged nanosheets and exhibit an absorption coefficient exceeding 10<sup>4</sup> cm<sup>− 1</sup> in the visible range, and an optical band gap between 1.2 and 1.45&#xa0;eV. The optimal sample showed the highest purity of the SnSe phase and the most desirable stoichiometric composition among all the prepared samples.</p>

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Electrodeposition of SnSe nanosheets: Effect of deposition potential on structural, morphological, and optical properties

  • 期刊论文

  • 发表日期：

    2025年11月10日

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  • Abdessamad El Kanouny,
  • Rkia Elotmani,
  • Ahmed El Manouni,
  • Outman El Khouja,
  • Ilhame Assahsahi,
  • Abdelmajid Almaggoussi,
  • Aurelian Catalin Galca

摘要

Tin selenide (SnSe) thin films were co-electrodeposited onto ITO/glass substrates from an aqueous solution containing tin(II) dichloride (SnCl2) and selenium dioxide (SeO2) as precursors, with ethylene diamine tetra-acetic acid (EDTA) as a complexing agent at 50 °C. The electrochemical behavior and co-deposition potentials of Sn, Se, and SnSe were analyzed using cyclic voltammetry. The influence of deposition potential on the structural, morphological, compositional, and optical properties of SnSe films was examined through X-ray diffraction, Raman spectroscopy, scanning electron microscopy, energy-dispersive X-ray spectroscopy, diffuse reflectance spectroscopy, and UV-Vis-NIR spectroscopy. The films consist of randomly arranged nanosheets and exhibit an absorption coefficient exceeding 104 cm− 1 in the visible range, and an optical band gap between 1.2 and 1.45 eV. The optimal sample showed the highest purity of the SnSe phase and the most desirable stoichiometric composition among all the prepared samples.