Abstract

The compound Cu2Ni0.75Co0.25SnS4 (CNCTS) was synthesized using the spin-coating technique. Analysis via X-ray diffraction and Raman spectroscopy revealed the formation of a cubic structure at 350 °C, with a lattice parameter of 5.40 Å and a crystallite size of 51 A°, with no secondary phase detected. Scanning electron microscopy and energy dispersive spectroscopy examination showed that the annealed CNCTS sample at 350 °C for 1 h displayed surface morphologies that were nearly uniform, dense, and rough, with a composition close to stoichiometric. UV–Visible–Near infrared analysis indicated that the bandgap energy of the annealed CNCTS at 350 °C is 1.39 eV, rendering it highly suitable for low-cost photovoltaic applications.

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