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橙红色荧光粉NaBa1?xPO4: xEu3+中Eu3+的占位情况及光谱性质
作者:陈永杰1 左修源1 肖林久1 耿秀娟1  英1 张中秋2  秋1  爽1 
单位:(1. 辽宁省稀土化学及应用重点实验室 沈阳化工大学 沈阳 110142 2. 广东省食品药品职业技术学校 广州 510663) 
关键词:磷酸钠钡 橙红色荧光粉 铕离子掺杂 占位 光谱性质 
分类号:O482.31;P578.92
出版年,卷(期):页码:2019,47(4):0-0
DOI:
摘要:

 采用高温固相法合成了NaBa1?xPO4:xEu3+系列橙红色荧光粉。用X射线衍射、扫描电子显微镜、荧光光谱以及色坐标等手段对荧光粉的晶体结构和发光性能进行表征;考察了Eu3+的掺杂摩尔量对荧光粉的晶体结构和发光性能的影响。结果表明:Eu3+的掺杂并没有改变荧光粉的晶体类型,但是导致了晶格收缩,其基质主相是六方晶系的NaBaPO4。在393 nm近紫外光激发下,最强发射峰和次强发射峰分别位于红光616 nm和橙光591 nm附近,分别属于Eu3+ 的5D0→7F2和5D0→7F1特征跃迁。Eu3+的掺杂量为0.20 mol时荧光粉的发射峰强度最大。Eu3+的光谱性质及其占据基质晶格中Ba(Ⅱ)和Ba(Ⅰ)位点的比例随 Eu3+ 掺杂量的变化而变化,改变Eu3+的掺杂量可以有效调节荧光粉发射光谱中的红、橙光比例。其中荧光粉 NaBa0.80PO4:0.20Eu3+的性能优异,适合与近紫外LED芯片相匹配发光。

 A series of orange-red light-emitting phosphors NaBa1?xPO4:xEu3+ were synthesized by a high-temperature solid-state method. The crystal structure and luminescence properties of phosphors were characterized by X-ray diffractometer, scanning electron microscope, fluorescence spectrophotometer and chromaticity coordinates. The effect of Eu3+ doping content on the crystal structure and luminescence properties of the phosphors was investigated. The results show that doped Eu3+ has liitle effect on the crystal form of phosphors, but leads to contraction of the lattice. The main phase is NaBaPO4, and the crystal form belongs to a hexagonal crystal system. The maximum emission peak and the sub-maximal emission peak are located in red light at 616 nm and orange light at 591 nm under the excitation of near-ultraviolet light at 393 nm, belonging to 5D0→7F2 and 5D0→7F1 transition of Eu3+, respectively. The emission peak intensity of phosphors is most intense when the doping content of Eu3+ is 0.20 mol. The spectral properties and the ratio of Eu3+ occupying Ba(Ⅱ) and Ba(Ⅰ) sites of matrix crystal are affected by doped Eu3+ content. Changing the doping concentration of Eu3+ can effectively regulate the ratio of red and orange light in the emission spectrum of phosphors. The phosphor NaBa0.80PO4:0.20 Eu3+ has the superior performance and is suitable for matching with the near ultraviolet (UV) LED chip.

基金项目:
辽宁省科技厅自然科学基金项目(LS 201102174)。
作者简介:
参考文献:

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