Preparation and luminescence properties of Eu2O3 doped glass-ceramics containing NaY(MoO4)2 |
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| Affiliation: | 1. Department of Chemistry and Centre of Advanced Studies in Chemistry, Panjab University, Chandigarh 160014, India;2. Department of Environment Studies, Panjab University, Chandigarh 160014, India.;3. Centre for Nanobiotechnology, VIT University, Vellore 632014, India.;4. Department of Chemistry, College of Science and Arts, Najran University, Najran 11001, Saudi Arabia;5. Promising Centre for Sensors and Electronic Devices (PCSED), Najran University, Najran 11001, Saudi Arabia |
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| Abstract: | Eu2O3 doped transparent glass-ceramics containing NaY(MoO4)2 crystalline phase were prepared via melting-crystallization. The optimum heat treatment condition (660℃/3h) was determined by DSC, XRD, SEM and transmittance curves. The transmittance of glass-ceramic can reach 80 % in the visible region. The emission spectra of Eu2O3 doped glass-ceramics consist of Eu3+ ions characteristic emission peaks at 591nm (5D0→7F1) and 614nm (5D0→7F2). The optimal doping concentration of Eu2O3 in the glass-ceramics is 0.9 mol%, and fluorescence lifetime is 1.37042ms. The change of the ratio of red emission intensity to orange emission intensity leads to the shift of chromaticity coordinates from orange to red region, and the chromaticity coordinate (0.6337, 0.3635) of 0.9 mol% Eu2O3 doped glass-ceramic is closest to the standard red light coordinate. The results show that this kind of glass-ceramic is expected to be good red emission material. |
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| Keywords: | Glass-ceramics Luminescence properties |
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