Pr_(3+)掺杂Sr_(3)Y_(2)TeO_(9)红色荧光粉性能分析

A Study on the Luminescent Properties of Pr_(3+)Doped Sr_(3)Y_(2)TeO_(9)Red Phosphors

通过高温固相法合成Pr_(3+)掺杂Sr_(3)Y_(2)TeO_(9)红色荧光材料,并分析样品的物相与形貌、发光性能、浓度猝灭规律以及荧光衰减寿命等性能。结果表明:合成获得的单一相的Pr_(3+)掺杂Sr_(3)Y_(2)TeO_(9)样品,能够被450~490 nm左右的波长有效激发,发射出波长为612 nm的红光;不同物质量浓度的Pr_(3+)掺杂会影响荧光强度,最佳Pr_(3+)掺杂浓度为x=0.003;Pr_(3+)之间的电偶极-电偶极作用是导致荧光浓度猝灭发生的原因;x=0.003 Pr_(3+)掺杂Sr_(3)Y_(2)TeO_(9)的衰减寿命约为7.676μs。因此Pr_(3+)掺杂的Sr_(3)Y_(2)TeO_(9)红色荧光粉有望用于白光LED。

Pr_(3+)-doped Sr_(3)Y_(2)TeO_(9)red phosphors were synthesized via the method of high temperature solid-state,and their phase structure,fluorescence properties,concentration quenching and decay lifetime of these samples were investigated.The results imply that the synthesized samples are single phase,which can be excited at the wavelength of 450-490 nm to emit red light around 612 nm;the optimal doped concentration is x=0.003 based on the effect analyzed of different material concentrations of Pr_(3+)doping on the fluorescence intensity;the fluorescence concentration quenching of Pr_(3+)-doped Sr_(3)Y_(2)TeO_(9)is attributed to the electric dipole-electric dipole interaction of energy transfer between Pr_(3+)ions;and the decay lifetime of x=0.003 Pr_(3+)-doped Sr_(3)Y_(2)TeO_(9)is about 7.676μs.Therefore,Pr_(3+)-doped Sr_(3)Y_(2)TeO_(9)red phosphors has the potential application in white LEDs.