Using copper acetate (Cu₂(CH₃COO)₄) and thiourea (CH₄N₂S) as precursors, copper sulphide thin films were synthesized on glass substrates by the spin coating method followed by annealing in the nitrogen gas. X-Ray Diffraction patterns show that the as-deposited film is amorphous. Annealing at 350°C is observed to result in the conversion to the cubic chalcocite Cu2S phase, which is confirmed by the EDX spectrum. The analysis of the UV-vis spectra reveals a transmittance of around 65% for the as-deposited film, which increases to 85% by annealing. The optical band gap is found to decrease from 2.70 to 2.55 eV by annealing.
No takes yet. Share an insight, caveat, or question.
Elmourabit et al. (2024) studied this question.