Y2O3: Eu,Dy的制备与红色长余辉发光性能研究

采用高温固相法合成发光样品Y₂O₃：Eu³⁺_0.01和Y₂O₃：Eu³⁺_0.01，Dy³⁺_0.01.X射线衍射分析(XRD)表明样品保持Y₂O₃晶格结构，掺入的Eu³⁺和Dy³⁺对Y_{2关键词： 长余辉 2}O₃')" href="#">Y₂O₃ 稀土掺杂 陷阱

Preparation and red long-afterglow luminescence of Y2O3:Eu,Dy

The rare-earth doped phosphors Y₂O₃：Eu³⁺_0.01and Y₂O₃：Eu³⁺_0.01, Dy³⁺_0.01 were synthesized by a high temperature solid-state reaction method. The phase structures of the phosphors were characterized by X-ray diffraction. The Eu³⁺and Dy³⁺doping does not change the crystal sructure of Y₂O₃, the Eu³⁺and Dy³⁺ ions enter into the host crystal lattice . The emission spectra due to ⁵D₀→⁷F_Jof Eu³⁺show that Eu³⁺is the only luminescence center. There is no glow peak from Dy³⁺. The decay characteristics of phosphors Y₂O₃：Eu³⁺_0.01, Dy³⁺_0.01 follows the Double exponential distribution. The measurement of thermoluminescence reveals that the trap is generated by Eu³⁺. The Dy³⁺doping doesn’t change the trap depth, and helps the electrons escape from the trap, which induces long-afterglow luminescence.