Résumé
Thin zinc sulfide (ZnS) layers were synthesized by spray pyrolysis at 300°C on ZnS nucleation layers pre-deposited on glass substrate at 200°C. With the aim of the process optimization, the ZnS nucleation layer deposition time varies from 15 to 75 s. The layers properties were investigated by using X-ray diffraction (XRD), Profilometry, energy dispersive spectroscopy (EDS) and photoluminescence (PL) measurements. An optimal value of 30 s was obtained for the ZnS nucleation layer deposition duration. We have shown that using the ZnS nucleation layer makes it possible to improve the quality of ZnS thin films and eliminate the defects responsible of red emission.