Abstract
Cu–Fe–Sn–S have been electrodeposited on indium tin oxide coated glass (ITO/glass) substrates, varying only the deposition time, followed by sulfurization in argon atmosphere at a temperature of 500 °C. X-ray diffraction patterns confirmed the formation of polycrystalline CFTS and other secondary phases. The Raman spectroscopy results confirm the formation of stannite phase, by the existence of the most intense peak at 330 cm−1 corresponding to A-symmetry vibrational mode, while the SnS2 surface phase reduces upon increasing deposition time. The inferred bandgaps by specular transmission are in 1.4–1.7 eV range, influenced by the detected orthorhombic Cu4SnS4 and rhodostannite secondary phases. The electrical measurements confirm the p-type nature of the films, while density of free carriers is relatively high (~ 1019 cm−3), leading to extremely low resistivity in the Ω cm range.
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Acknowledgements
O.E.K. acknowledges the receipt of the OEA grant AF-15/20-01 from the Abdus Salam International Centre for Theoretical Physics, Trieste, Italy. All authors acknowledge the funding from Moroccan Ministry of Higher Education and Research and Centre National pour la Recherche Scientifique et Technique in the framework of PPR/37/2015 project, and from Romanian Ministry of Research, Innovation and Digitalization trough the Core Program PN19-03 (contract no. 21 N/ 08.02.2019) and PN-III-P4-ID-PCE-2020-0827 (Contract no. PCE74 09/02/2021) project.
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El Khouja, O., Galca, A.C., Zaki, M.Y. et al. Secondary phases and their influence on optical and electrical properties of electrodeposited Cu2FeSnS4 films. Appl. Phys. A 127, 887 (2021). https://doi.org/10.1007/s00339-021-05038-y
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DOI: https://doi.org/10.1007/s00339-021-05038-y