Abstract
The present work investigates the structural and optical properties of Cu2ZnSnS4 (CZTS) thin films deposited at room temperature with different thicknesses onto glass substrates, using thermal evaporation method. All CZTS layers were annealed in a furnace in sulfur atmosphere at a temperature of 375 °C during 40 min, so as to optimize the kesterite CZTS phase. The influence of film thickness and sulfurization step on the structural and optical properties of Cu2ZnSnS4 thin layers was developed. XRD investigations exhibit amorphous phase for all samples, except the thicker layer, however, after sulfurization step, all films indicate polycrystalline phase of CZTS, except the thinner one. It is interest to note that the fabricated CZTS layers, show good optical absorption higher than 105 cm−1 in the visible range. We found also that the band gap energy may be monitored and is completely close to the ideal value of about 1.5 eV for solar cell application. This behavior accented after annealing.
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A.L.: Conceptualization, Methodology, Writing Original Draft. H.D: Conceptualization, Methodology, Correction, Discussion. M.K. Conceptualization, Methodology and Supervision.
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Larbi, A., Dahman, H. & Kanzari, M. Structural and optical investigations at room temperature of sulfurized thermal evaporated Cu2ZnSnS4. J Mater Sci: Mater Electron 33, 22053–22067 (2022). https://doi.org/10.1007/s10854-022-08936-w
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DOI: https://doi.org/10.1007/s10854-022-08936-w