蓝色荧光粉Sr_(3)LnM(PO4)3F∶Eu^(2+)的发光调控  

Luminescence Regulation of Blue Phosphor Sr_(3)LnM(PO_(4))_(3)F∶Eu2+

作　　者：王维昊 王延惠 叶凯文 胡一凡 WANG Weihao;WANG Yanhui;YE Kaiwen;HU Yifan(College of Chemistry and Materials Science, Guangdong University of Education, Guangzhou 510800, China)

机构地区：[1]广东第二师范学院化学与材料科学学院,广州510800

出　　处：《人工晶体学报》2022年第4期679-686,共8页Journal of Synthetic Crystals

基　　金：广东省2021年度大学生创新创业训练计划(S202114278011);广州市科技计划(202102020458);广东第二师范学院博士科研专项经费研究项目(2016ARF01)。

摘　　要：采用高温固相法合成了一系列Eu^(2+)激活的Sr_(3)LnM(PO_(4))_(3)F(Ln=Gd,La,Y;M=Na,K)荧光粉,并通过X射线衍射、扫描电子显微镜、荧光光谱等对样品的物相结构、形貌和发光特性进行了表征及分析。结果表明:成功合成了Sr_(3)LnM(PO_(4))_(3)F∶Eu^(2+)荧光粉,样品的粒径为2~10μm。荧光粉在蓝光区具有强烈的发射,归属为发光中心Eu^(2+)的4f^(6)5d→4f^(7)跃迁。当基质中的碱金属M由Na变成K时,Eu^(2+)的发光颜色由淡蓝色变成深蓝色,色纯度大幅提高,有效地调控了Eu^(2+)在氟磷灰石Sr_(3)LnM(PO_(4))_(3)F中的发光,进而发现了一种通过改变第二层配位原子来调控Eu^(2+)发光的策略。A series of Eu^(2+)-activated Sr_(3)LnM(PO_(4))_(3)F(Ln=Gd,La,Y;M=Na,K)phosphors were synthesized by high-temperature solid-phase method.The phase structure,morphology and luminescence characteristics of the samples were characterized by X-ray diffraction,scanning electron microscopy,fluorescence spectroscopy and other test methods.The experimental results demonstrate that the phosphor Sr_(3)LnM(PO_(4))_(3)F∶Eu^(2+)was successfully synthesized,and the particle size of the sample ranges from 2μm to 10μm.The phosphor has strong emission in the blue-light region,which is attributed to the 4f^(6)5d→4f^(7) transition of the luminescent center Eu^(2+).The emitting color of Eu^(2+)changes from light blue to dark blue and the color purity increases after the transformation of Na to K,which effectively regulates the luminescence of Eu^(2+)in fluorapatite Sr_(3)LnM(PO_(4))_(3)F.A new strategy by substituting of the secondary layer coordination atom is found to regulate the phosphors color of Eu^(2+).

关 键 词：稀土发光材料 蓝色荧光粉 Eu^(2+) 高温固相法 氟磷灰石 发光调控 第二层配位原子 色纯度 

分 类 号：O482.31[理学—固体物理] TQ422[理学—物理]