Luminescence properties of Eu3+-doped new scheelite-type compounds
来源期刊：JOURNAL OF RARE EARTHS2015年第12期
论文作者：王娇 张志军 赵景泰
文章页码：1241 - 1245
摘 要：The efficient new red emitting scheelite-type compounds,Eu3+-doped（5 mol.%） Y(Zr0.5W0.5)O4,Lu(Zr0.5W0.5)O4 and Y(Y1/3W2/3)O4,were successfully prepared.The crystal structure,photoluminescence and decay properties of the obtained phosphors were investigated.Shifts of the peaks in the XRD patterns were observed when Y3+ sites in the host were occupied by Lu3+ or Zr/W sites were occupied by Y/W.As a result of the crystallographic occupancy of Eu3+ located at the cation positions without inversion symmetry,under O→Zr/W and O→Eu3+ ligand-to-metal charge-transfer states（LMCT） excitation at 300 nm,the emission spectra of these compounds presented 5D0→7F2 transition for Eu3+ at 612 nm.The diagram of Eu3+ energy levels in these new scheelite-type compounds and the energy transfer processes were discussed.
王娇1，张志军2，赵景泰2
1. School of Information Science&Engineering,Fudan University2. School of Materials Science and Engineering,Shanghai University
摘 要：The efficient new red emitting scheelite-type compounds,Eu3+-doped（5 mol.%） Y(Zr0.5W0.5)O4,Lu(Zr0.5W0.5)O4 and Y(Y1/3W2/3)O4,were successfully prepared.The crystal structure,photoluminescence and decay properties of the obtained phosphors were investigated.Shifts of the peaks in the XRD patterns were observed when Y3+ sites in the host were occupied by Lu3+ or Zr/W sites were occupied by Y/W.As a result of the crystallographic occupancy of Eu3+ located at the cation positions without inversion symmetry,under O→Zr/W and O→Eu3+ ligand-to-metal charge-transfer states（LMCT） excitation at 300 nm,the emission spectra of these compounds presented 5D0→7F2 transition for Eu3+ at 612 nm.The diagram of Eu3+ energy levels in these new scheelite-type compounds and the energy transfer processes were discussed.
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