Materials Research (Apr 2024)
Wet Chemical Synthesis and Optical Properties of Co2+-Doped Magnesium Stannate Ceramics
Abstract
Magnesium stannate (Mg2SnO4) samples with 0.003, 0.004, 0.03, 0.05, 0.08, 0.1, 0.2, 0.3, 0.5, 1, 2, and 5 at. mol% of Co2+ were prepared by wet chemical method. The samples were investigated using X-Ray diffraction and photoluminescence techniques at room temperature. The results indicate that Co2+ occupies tetrahedral sites in the inverse spinel structure of Mg2SnO4, replacing Mg2+. The material exhibited a red-infrared luminescence associated with Co2+ spin-allowed transitions. Crystal field parameters were calculated using Tanabe-Sugano theory for d7 systems in tetrahedral environment. In the range studied, optimum divalent cobalt concentration for emission applications was found to be 0.08 at. mol%.
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