Luminescence properties of Eu3+-doped new scheelite-type compounds

作者：Wang Jiao; Zhang Zhijun; Zhao Jingtai^*

来源：Journal of Rare Earths, 2015, 33(12): 1241-1245.

DOI：10.1016/S1002-0721(14)60551-2

• Eu3+ red luminescence
• scheelite-type
• rare earths

The efficient new red emitting scheelite-type compounds, Eu3+-doped (5 mol.%) Y(Zr0.5W0.5)O-4, Lu(Zr0.5W0.5)O-4 and Y(Y1/3W2/3)O-4, 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 D-5(0)-> F-7(2) 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.

• 出版日期2015-12
• 单位上海大学; 复旦大学