Ca_3(PO_4)_2:RE^(3+) (RE=Eu,Dy,Ce,Tb)荧光粉的制备及其发光特性

Preparation and luminescence properties of Ca_3(PO_4)_2:RE^(3+) (RE=Eu,Dy,Ce,Tb) phosphors

采用高温固相法合成了Ca_3(PO_4)_2:RE^(3+)(RE=Eu,Dy,Ce,Tb)系列发光材料,研究了其发光性质。研究表明Ca_3(PO_4)_2:RE^(3+)在紫外区域均能有效被激发,有很强的荧光发射,且发光范围覆盖蓝到红光波段,是一类可以紫外激发实现白光LED用的潜在荧光粉。在0.005～0.03 mol浓度范围内,Eu,Dy和Ce掺杂的荧光粉的发光都发生了浓度淬灭,分别对应于0.025 mol,0.025 mol和0.02 mol,而Tb^(3+)掺杂样品表现出高的发光淬灭浓度。

A series of phosphors Ca3（PO4）2：RE^3＋（RE=Eu,Dy,Ce,Tb） were prepared by a high temperature solid-state reaction method. Their luminescence properties were investigated. The results indicated that all samples can be effectively excited by ultraviolet light with fluerescence range from blue to red light, and they are the potential phosphors to obtain white LED excited by ultraviolet light. In the range of 0.005-0.03 tool, photoluminescence quenching concentration of Eu3＋, Dy3＋, and Ce3＋-doped are 0.025 mol, 0.025 mol and 0.02 tool, respectively, and Tb3＋-doped samples has high quenching concentration.