橙红色荧光粉NaBa_(1-x)PO_4:xEu^(3+)中Eu^(3+)的占位情况及光谱性质  

Location and Spectral Properties of Eu^(3+) in Orange-red Light-emitting Phosphors NaBa_(1-x)PO_4:xEu^(3+)

作　　者：陈永杰[1] 左修源 肖林久[1] 耿秀娟[1] 杨英[1] 张中秋 申秋[1] 曹爽[1] CHEN Yongjie;ZUO Xiuvuan;XIAO Linjiu;GENG Xiujuan;YANG Ying;ZHANG Zhongqiu;SHEN Qiu;CAO Shuang(Key Laboratory of Rare Earth Chemistry and Application of Liaoning Province,Shenyang University of Chemical Technology,Shenyang 110142,China;Guangdong Food and Drug Vocational-technical School,Guangzhou 510663,China)

机构地区：[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

出　　处：《硅酸盐学报》2019年第4期494-500,共7页Journal of The Chinese Ceramic Society

基　　金：辽宁省科技厅自然科学基金项目(LS 201102174)

摘　　要：采用高温固相法合成了NaBa_(1-x)PO_4:xEu^(3+)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Eu^(3+)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:Eu^(3+)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NaBaPO_4。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Eu^(3+)的~5D_0→~7F_2和~5D_0→~7F_1特征跃迁。Eu^(3+)的掺杂量为0.20 mol时荧光粉的发射峰强度最大。Eu^(3+)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Eu^(3+)掺杂量的变化而变化,改变Eu^(3+)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NaBa_(0.80)PO_4:0.20Eu^(3+)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:xEu^3+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 Eu^3+doping content on the crystal structure and luminescence properties of the phosphors was investigated.The results show that doped Eu^3+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 Eu^3+,respectively.The emission peak intensity of phosphors is most intense when the doping content of Eu^3+is 0.20 mol.The spectral properties and the ratio of Eu^3+occupying Ba(Ⅱ)and Ba(Ⅰ)sites of matrix crystal are affected by doped Eu^3+content.Changing the doping concentration of Eu^3+can effectively regulate the ratio of red and orange light in the emission spectrum of phosphors.The phosphor NaBa0.80PO4:0.20Eu^3+has the superior performance and is suitable for matching with the near ultraviolet(UV)LED chip.

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[理学—固体物理] P578.92[理学—物理]