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Luminescence properties of Ce3+ and Eu2+ doped M3MgSi2O8 (M = Ca, Sr) phosphors for potential detecting applications
摘要： A series of phosphors M3–xLnxMgSi2O8 (M = Ca, Sr; Ln = Ce, Eu; x = 0.005, 0.01, 0.03, 0.05, 0.07, 0.10, 0.15) were synthesized. The luminescence properties in the vacuum ultraviolet-ultraviolet visible spectral range and the X-ray excited radioluminescence were investigated in detail. The results reveal that the M3–xLnxMgSi2O8 (M = Ca, Sr; Ln = Ce, Eu) phosphors exhibit typical broad excitation and emission bands, which are ascribed to the 4f–5d transitions of the Ce3+ and Eu2+ ions. Finally, X-ray excited luminescence (XEL) spectra were measured to evaluate the possibility of Sr3MgSi2O8:Ce3+ and Sr3MgSi2O8:Eu2+ as scintillation materials.
关键词： Scintillation materials,M3MgSi2O8,Luminescence properties
更新于2025-09-11 14:15:04
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Temperature Gradient Designing and Optical Properties of SrI2 and SrI2:Eu Crystals Grown by Edge-Defined Film-Fed Growth (EFG) Method
摘要： In this work, SrI2 and SrI2:Eu5% single crystals with size of ?10 9 60 mm3 and ?10 9 30 mm3 were successfully grown by edge-de?ned ?lm-fed growth (EFG) method. In the crystal growth process, the crack and turbidity of the crystal were solved by designing a temperature ?eld, thereby optimizing crystal quality and obtaining crack-free crystals. X-ray diffraction analysis was performed on the grown crystals, and the optical properties of these crystals have been investigated at room temperature. Under the excitation of ultraviolet (UV) light, the crystals exhibit a single luminescence peak centered at 435 nm (kex = 350 nm), and the photoluminescence (PL) decay time is 0.594 ls. In addition, the designed temperature ?eld also provides a reference value for other crystals grown by EFG method.
关键词： Crystal growth,temperature ?eld,scintillation materials,optical properties
更新于2025-09-10 09:29:36