| VUV spectroscopic properties of rare-earth（RE=Eu,Tb and Dy）-doped A2Zr（PO4）2（A=Li,Na and K） phosphates |
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| 引用本文： | 林啸,冯昂,张志军,赵景泰.VUV spectroscopic properties of rare-earth（RE=Eu,Tb and Dy）-doped A2Zr（PO4）2（A=Li,Na and K） phosphates[J].中国稀土学报(英文版),2014,32(10):946-951. |
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| 作者姓名： | 林啸 冯昂 张志军 赵景泰 |
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| 作者单位： | [1]Key Laboratory of Transparent Opto-Functional Inorganic Materials of Chinese Academy of Sciences,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 200050,China; [2]Graduate University of Chinese Academy of Sciences,Beijing 100039,China; [3]School of Materials Science and Engi- neering,Shanghai University,Shanghai 200072,China |
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| 基金项目： | supported by National Natural Science Foundation of China(11104298,5033250,U1332202);Innovation Program of Shanghai Institute of Ceramics(Y34ZC130G) |
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| 摘 要： | This study fully investigated the vacuum ultraviolet excitation spectra of pure and rare-earth（RE=Eu, Tb and Dy）-doped A2Zr（PO4）2（A=Li, Na and K） phosphors. The synthesized Na and Li compounds were characterized by XRD showing two new types of phases after indexation. Although these three pure compounds had different crystal structures, they exhibited similar luminescence properties. For Eu3＋-activated samples, the broad excitation band centered at 217 nm could be attributed to the CT transition between O2–（2p6） and Eu3＋ ions. For Tb3＋-doped samples, two groups of f-d transitions were observed, where a strong broad band at 221 nm was due to the spin-allowed f-d transition. Energy transfer from O2– to Dy3＋was not observed in Dy3＋-doped phosphors, probably because it overlapped considerably with the CT transition from O2– to Zr4＋ at 187 nm.
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| 关 键 词： | 铽掺杂 铕激活 光谱特性 RE 稀土 Na VUV 磷酸盐 |
| 收稿时间： | 19 February 2014 |
VUV spectroscopic properties of rare-earth(RE=Eu,Tb and Dy)-doped A_2Zr(PO_4)_2(A=Li,Na and K) phosphates |
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| Abstract: | This study fully investigated the vacuum ultraviolet excitation spectra of pure and rare-earth (RE=Eu, Tb and Dy)-doped A2Zr(PO4)2 (A=Li, Na and K) phosphors. The synthesized Na and Li compounds were characterized by XRD showing two new types of phases after indexation. Although these three pure compounds had different crystal structures, they exhibited similar luminescence properties. For Eu3+-activated samples, the broad excitation band centered at 217 nm could be attributed to the CT transition between O2– (2p6) and Eu3+ ions. For Tb3+-doped samples, two groups of f-d transitions were observed, where a strong broad band at 221 nm was due to the spin-allowed f-d transition. Energy transfer from O2– to Dy3+ was not observed in Dy3+-doped phosphors, probably because it overlapped considerably with the CT transition from O2– to Zr4+ at 187 nm. |
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| Keywords: | rare-earth phosphates optical materials luminescence VUV spectra |
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