Influence of Ln2S3 (Ln – Gd, Dy) dopant on the crystal structure and optical properties of zinc sulfide
Chem. Met. Alloys 3 (2010) 75-82
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(²²²) 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.
Zinc sulfide / Crystal structure / Dopant / Exchange reaction