Luminescence and microstructures of Eu-doped in triple phosphate Ca8MgR(PO4)7 (R = La, Gd, Y) with whitlockite structure |
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Authors: | Yanlin Huang Yonggang Cao Hyo Jin Seo |
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Affiliation: | a College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China b Department of Physics, Pukyong National University, Daeyeon 3-Dong 599-1, Namgu, Busan 608-737, Republic of Korea |
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Abstract: | Eu3+-doped triple phosphate Ca8MgR(PO4)7 (R = La, Gd, Y) was synthesized by the general high temperature solid-state reaction. This phosphor was characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) and emission spectra. XRD and FT-IR analysis indicated that Ca8MgR(PO4)7 (R = La, Gd, Y) crystallized in single-phase component with whitlockite-like structure (space group R3c) of β-Ca3(PO4)2. Under the excitation of UV light, the phosphors show bright red emission assigned to the transition (5D0 → 7F2) at 612 nm. The crystallographic sites of Eu3+ ions in Ca8MgR(PO4)7 (R = La, Gd, Y) host were discussed on the base of site-selective excitation and emission spectra, luminescence decay and its host crystal structure. |
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Keywords: | 81 40 Wx 81 10 Jt 78 55 Hx |
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