白光LED用Sr_3Gd(PO_4)_3:Dy^(3+)荧光粉的光谱性能

Synthesis and Spectral Characteristics of Dy^(3+) -doped Sr_3Gd(PO_4)_3 -based Fluorescent Materials

以碳酸锶、氧化钆、磷酸氢二铵、氧化镝为原料,使用人工智能箱式炉在空气气氛中1300℃下反应11h,合成了Sr_3Gd(PO_4)_3:Dy^(3+)荧光粉。采用X射线衍射、扫描电子显微镜、荧光光谱仪对样品进行了表征。结果表明,Sr_3Gd(PO_4)_3基体中含有少量Sr_3(PO_4)_2杂质相时有利于提高荧光粉的发光强度。在365 nm紫外光激发下,Sr_3Gd(PO_4)_3:Dy^(3+)系列样品可以通过单一基质获得白光,在白光LED领域具有潜在的应用前景。

In this work,Sr_3Gd(PO_4)_3: Dy^(3+)phosphors were synthesized by solid-state reaction method. SrCO_3,(NH_4)_2HPO_4 and rare earth oxides( Gd_2O_3,Dy_2O_3) were used as raw materials. The artificial intelligent box furnace KLS-1400 X was used to fire the starting materials in air atmosphere at 1300 ℃ for 11 hours and then cooled to room temperature. All the samples were characterized by X-ray diffraction and scanning electron microscopy. The results of UV spectroscopy and color coordinate analysis show that the presence of impurity phase Sr_3(PO_4)_2 in matrix material can improve the luminescence strength. Under 365 nm excitation,series samples Sr_3Gd(PO_4)_3: Dy^(3+)emitted white light,suggesting a type of practical white light-emitting diode phosphor in promising application.