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首页> 中文期刊> 《材料导报》 >Ba2+共掺杂YPO4∶Tb3+荧光材料的水热合成与荧光性能

Ba2+共掺杂YPO4∶Tb3+荧光材料的水热合成与荧光性能

         
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摘要

Ba2+ co-doped YPO4 ∶ Tb3+ phosphors were successfully synthesized by hydrothermal method.The crystal structure and optical properties of the as-synthesized samples were investigated by X-ray diffraction (XRD),scanning electron microscopy (SEM),photoluminescence (PL).The influences of Ba2+ co-doping concentration and precursor solution pH on the phase structure and luminescence properties of the as-products were investigated.The results show that the pH and Ba2+ co-doping concentration play the key role in the structure and luminescence properties of the as-synthesized samples.A small amount of Ba2+ (no more than 10 at0％) co-doped YPO4 ∶ 1 at0Tb3+ samples are single-phase crystals with tetragonal xenotime structure,and Ba3 (PO4)2 impurity phase can be observed in the sample co-doped with a large amount of Ba2+.The pure and high crystallinity Ba2+,Tb3+ co-doped YPO4 samples can be obtained at pH 6 condition.The results of excitation and emission spectra show that the YPO4 ∶ 1 at％Tb3+,x at％Ba2+ samples can be excited by 225 nm UV light and emit the characteristic yellow-green light of Tb3+.An appropriate amount of Ba2+ co-doped YPO4∶1 at％Tb3+ samples display enhanced luminescence,and a large amount of Ba2+ (more than 10 at％) co-doping in the YPO4 ∶ 1 at％Tb3+ samples can quench the Tb3+ emission.The optimized doping content of Ba2+ is 10 at％.The intensity of emission peak located at 545 nm of YPO4 ∶1 at％Tb3+,10 at％ Ba2+ sample are 1.8 times as many of the YPO4 ∶1 at％Tb3+ sample.%采用水热法合成Ba2+共掺杂YPO4∶Tb3+荧光材料,并通过X射线衍射(XRD)、扫描电子显微镜(SEM)和荧光分光光度计等研究了合成样品的物相组成和荧光性能,并分析了Ba2+掺杂量和反应体系pH值等对合成样品的物相结构及荧光性能的影响.结果表明,反应体系pH值和Ba2+掺杂量直接影响所制备样品的结构与性能.少量Ba2+(≤10％,原子分数,下同)共掺杂YPO4∶1％Tb3+样品均为纯相四方晶系磷钇矿结构晶体,过量Ba2+掺杂导致Ba3(PO4)2杂质相的出现;pH值为6的水热环境下可获得高结晶度的单一相Ba2+、Tb3+共掺杂YPO4样品.激发和发射光谱测试结果表明,所制备的YPO4∶1％Tb3,x％Ba2+样品可被225 nm的紫外光有效地激发而发射出强烈的Tb3+特征的黄绿色光.一定量的Ba2+共掺杂可以有效地提高YPO4∶1％Tb3+样品的荧光性能,但过量(高于10％)的Ba2+掺杂又会导致Tb3+的荧光猝灭现象出现,最佳的Ba2+共掺杂量为10％.所制备的YPO4∶1％Tb3+,10％Ba2+样品在225 nm紫外光激发下位于545 nm处的发射带强度是YPO4∶1％Tb3+样品的1.8倍.

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  • 来源
    《材料导报》 |2017年第18期|16-20|共5页
  • 作者

    付兵; 欧娅; 刘欢; 顾曼琦; 陈卓; 杨锦瑜;

  • 作者单位

    贵州师范大学化学与材料科学学院,贵阳550001;

    贵州省功能材料化学重点实验室,贵阳550001;

    贵州师范大学化学与材料科学学院,贵阳550001;

    贵州省功能材料化学重点实验室,贵阳550001;

    贵州师范大学化学与材料科学学院,贵阳550001;

    贵州省功能材料化学重点实验室,贵阳550001;

    贵州师范大学化学与材料科学学院,贵阳550001;

    贵州师范大学化学与材料科学学院,贵阳550001;

    贵州省功能材料化学重点实验室,贵阳550001;

    贵州师范大学化学与材料科学学院,贵阳550001;

    贵州省功能材料化学重点实验室,贵阳550001;

  • 原文格式 PDF
  • 正文语种 chi
  • 中图分类 光化学物质;
  • 关键词

    YPO4∶Tb3+/Ba2+共掺杂; 水热法; 荧光; 稀土发光材料;

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