适合近紫外和蓝光激发的Sr_(2-x)ZnMoO_6:xEu^(3+)红色荧光粉的制备与发光性能

Preparation and Luminescence Properties of Red Phosphor Sr_(2-x)ZnMoO_6:xEu^(3+) Suitable for Near Ultraviolet and Blue Light Excitation

采用高温固相法制备了适合于近紫外、蓝光激发的Sr2–xZnMoO6:xEu3+红色荧光粉。研究了Eu3+掺杂量对样品发光性能的影响。XRD谱显示合成样品为纯相Sr2ZnMoO6晶体。激发光谱由一系列尖峰和电荷迁移带组成,主激发峰位于395nm和465nm处,对应于Eu3+的7F0→5L6和7F0→5D2跃迁。在395nm和466nm激发下,主发射峰分别位于597nm和624nm,对应Eu3+的5D0→7F1和5D0→7F2跃迁。随着Eu3+掺杂量的增加,发射光谱强度先增大后减小,Eu3+最佳掺杂量为0.2。研究了分别以Cl–、Li+、Na+和K+作为电荷补偿剂对发光性能的影响,结果显示Li+补偿效果最为显著。

The Sr2-xZnMoO6：xEu3＋ red phosphors were synthesized via the high temperature solid state reactions, which are suitable for nearly ultraviolet and blue light chips excited. The effect of the doping quantity of Eu3＋ activator on the luminescence properties was investigated. The X-ray diffraction patterns indicated that the sample is a pure phase of Sr2ZnMoO6：Eu3＋. The excitation spec- trum consists of a series of peaks and a charge transfer band. And the main excitation peaks are located at 395um and 465 urn, origi- nated of the 7F0→SL6 and 7F0→SD2 transition of Eu3＋ions, respectively. The main emission is located at 597 nm and 624 um under the excitation of 395 um and 466 urn, respectively, corresponding to 5Do→TF1 and 5Do→7F2 transition. The luminescent intensity firstly increased and then decreased with increasing Eu3＋ content（x）. The luminescent intensity has the superior value at Eu3＋ content x of 0.20. The effect of charge compensator of CI-, Li＋, Na＋ and K＋ ions on the luminescence properties were investigated. The results indicate the charge compensator of Li＋ can give the optimum effect.