Influence of Ln₂S₃ (Ln – Gd, Dy) dopant on the crystal structure and optical properties of zinc sulfide

Chem. Met. Alloys 3 (2010) 75-82

https://doi.org/10.30970/cma3.0120

V.F. ZINCHENKO, N.O. CHIVIREVA, G.I. KOCHERBA, V.Ya. MARKIV, N.M. BELYAVINA

Data on the influence of the alloying dopants gadolinium or dysprosium sulfide on the crystal structure of ZnS prepared by self-propagating high-temperature synthesis (SHS) are presented. The dopants contribute to the removal of ZnO impurity from zinc sulfide by a reaction of double exchange resulting in the appearance of lanthanide oxysulfide, Ln₂O₂S. High-temperature annealing in deep vacuum produces significant changes in the crystal structure. Products of the reduction of Ln(ІІІ) were reveled by the presence of intense absorption bands in the UV range of the spectrum. Thin-film coatings on glass substrates have the character of a composite consisting of amorphous components and nanoparticles of the cubic modification of ZnS.

Crystal structure of the polymorphic modifications ZnS–4H (a) and ZnS–2H (b) of zinc sulfide.

Keywords

Zinc sulfide / Crystal structure / Dopant / Exchange reaction