Photocurable silica hybrid organic–inorganic films for photonic applications |
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Authors: | Stefano Costacurta Luca Malfatti Paolo Falcaro Plinio Innocenzi |
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Institution: | (1) School of Materials Science and Engineering, Key Laboratory for Advanced Ceramics and Machining Technology of Ministry of Education, Tianjin University, Tianjin, 300072, China;(2) School of Electronic and Information Engineering, Tianjin University, Tianjin, 300072, China;(3) Hebei University of Technology, Tianjin, 300130, China |
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Abstract: | This paper reports the detailed preparation process of Eu2+ activated Sr3Al2O6 by a sol-gel method in the reducing atmosphere. The effect of the calcining temperature on the microstructure, crystalline
particle morphology and luminescence properties of Sr3Al2O6:Eu2+ is systematically discussed. X-ray diffraction (XRD), thermogravimetry-differential thermal analysis (TG-DTA), scanning electron
microscopy (SEM) and fluorescence spectrophotometer were employed to characterize the phosphor. The Sr3Al2O6:Eu2+ phosphor powders calcined at 1200 °C for 2 h possessed a Sr3Al2O6 single cubic phase. The Sr3Al2O6:Eu2+ crystallites showed flower-like morphology. The Sr3Al2O6:Eu2+ phosphor powders exhibited a red broad emission band with emission peak at 612 nm under 472 nm excitation. Especially the
Sr3Al2O6:Eu2+ phosphor powders prepared at 1200 °C showed the strongest luminescence intensity, due to the pure phase and higher crystallinity
of Sr3Al2O6. |
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Keywords: | Sr3Al2O6 phosphors Red luminescence Sol– gel method Flower-like crystallite |
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