| Incorporation of europium (Ⅱ) nanostructures into the channels of mesoporous silicon oxy-nitride for enhanced photoluminescence |
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| 摘 要： | Divalent europium(Ⅱ)-doped mesoporous silicon oxy-nitride materials, as a novel type of nanoscopic photoluminescent material, are studied in which the optically active luminescent centers are isolated within the pores, Colorless and transparent blue emitting luminous Eu~(2+)-doped mesoporous silicon oxy-nitride materials were prepared from mesoporous silica via impregnation, nanocasting and nitrogen-assisted carbothermal reduction and nitridation method. The morphology and porosity of the silica remain unchanged during the synthesis process as revealed by SEM images and by nitrogen sorption studies. Photoluminescence studies reveal a strong blue emission band for Eu~(2+) centered at 425 nm with a quantum efficiency of 47%. The luminescent intensity is greatly influenced by the amount of co-dopant, Al~(3+) ions.
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| 收稿时间： | 2017-06-23 |
Incorporation of europium(II) nanostructures into the channels of mesoporous silicon oxy-nitride for enhanced photoluminescence |
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| D. Suresh,M. Yamashita,T. Akai. Incorporation of europium(II) nanostructures into the channels of mesoporous silicon oxy-nitride for enhanced photoluminescence[J]. Journal of Rare Earths, 2018, 36(5): 449-455. DOI: 10.1016/j.jre.2017.11.010 |
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| Authors: | D. Suresh M. Yamashita T. Akai |
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| Affiliation: | 1. National Institute for Advanced Industrial Science and Technology (AIST), Kansai Center, 1-8-31, Midorigaoka, Ikeda, Osaka, 563-8577, Japan;2. Department of Chemistry, School of Chemical and Biotechnology, SASTRA Deemed University, Thanjavur, 613 401, India |
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| Abstract: | Divalent europium(II)-doped mesoporous silicon oxy-nitride materials, as a novel type of nanoscopic photoluminescent material, are studied in which the optically active luminescent centers are isolated within the pores. Colorless and transparent blue emitting luminous Eu2+-doped mesoporous silicon oxy-nitride materials were prepared from mesoporous silica via impregnation, nanocasting and nitrogen-assisted carbothermal reduction and nitridation method. The morphology and porosity of the silica remain unchanged during the synthesis process as revealed by SEM images and by nitrogen sorption studies. Photoluminescence studies reveal a strong blue emission band for Eu2+ centered at 425 nm with a quantum efficiency of 47%. The luminescent intensity is greatly influenced by the amount of co-dopant, Al3+ ions. |
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| Keywords: | Blue luminescence Divalent europium Mesoporous silicon oxy-nitride Carbothermal reduction and nitridation (CRN) Rare earths |
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