采用水热微乳液法合成了SrWO4：Dy3+,Gd3+系列发光材料。利用XRD、SEM和荧光测试对热处理后样品的结构、形貌和发光性能进行了表征。 XRD结果表明：SrWO4：Dy3+,Gd3+的结构属四方晶系。以365nm紫外光为激发源,测得SrWO4：0．05Dy3+,0．05Gd3+的发光光谱主要发光峰位于487nm、575nm处,分别对应于Dy3+的4 F9/2→6 H15/2、6 H13/2跃迁,Gd3+可以增强Dy3+发光强度；当Gd3+掺杂的摩尔分数大于2%时,出现了浓度猝灭现象。色坐标分析显示：荧光粉的色坐标随着掺杂离子Gd3+的浓度加入量改变而发生变化。 x(Gd3+)为1%的样品的色坐标为(0．332,0．311),位于标准白光点的色坐标范围内。
SrWO4:Dy3+,Gd3+phosphors were prepared by hydrothermal microemulsion,precipation and hydro-thermal method. The structure, morphology and luminescence properties of the samples after heat treatment were characterized by XRD,SEM and luminescence spectroscopy. According to measurements with X-ray diffraction,this material belongs to tetragonal system. The main and second emission peaks are located at 575 nm and 487 nm under 365nm UV light excitation,which corresponds to the 4 F9/2→6 H13/2 and the 4 F9/2→6 H15/2 transitions of Dy3+ ions,re-spectively. It is suggested that Dy3+ ion is sensitized strongly by Gd3+ ion. The concentration quenching happens when the concentration of Gd3+ is 2%. The chromaticity coordinate of the phosphors change with the doping con-centration. When x(Gd3+)is 1%,the chromaticity coordinate of the phosphor is(0. 332,0. 311)which locates with-in the scope of the chromaticity coordinate of the standard white point.
参考文献
| [1] | Pan, H.;Hojamberdiev, M.;Zhu, G. .Hydrothermal synthesis of quasi-monodisperse AWO _4 (A = Ca, Sr, and Ba) microspheres[J].Journal of Materials Science,2012(2):746-753. |
| [2] | 娄志东,衣兰杰,滕枫,杨盛谊.喷雾热解法制备的SrWO4膜的阴极射线发光[J].发光学报,2007(03):402-406. |
| [3] | 翟永清,冯仕华,李艳威,安然.新型黄绿色发光材料Sr2MgSi3O9：Ce3+,Tb3+的合成及光谱分析[J].功能材料,2009(07):1068-1070,1073. |
| [4] | 杨志平,王少丽,杨广伟,田晶,李盼来,李旭.Sr2SiO4：Sm3+红色荧光粉的发光特性[J].硅酸盐学报,2007(12):1587-1589. |
| [5] | 李盼来,杨志平,王志军,郭庆林.Sr2SiO4：Dy3+ 材料制备及发光特性[J].高等学校化学学报,2008(03):457-460. |
| [6] | 连景宝,王秉新,李晓东,孙旭东.Gd2O2SO4：Dy3+纳米粉体的共沉淀法合成及光致发光研究[J].功能材料,2010(12):2091-2093,2097. |
| [7] | Wancong Lu;Han Zhou;Guitang Chen .Photoluminescence Properties of Neat and Dy~(3+)-Doped Gd3Ga5O_(12) Nanocrystals[J].The journal of physical chemistry, C. Nanomaterials and interfaces,2009(9):3844-3849. |
| [8] | 龚慧,林林,丘志海,黄兴勇,郑志强.适用于近紫外LED芯片的白光荧光粉Y2（MoO4）3∶DY3+的发光特性[J].人工晶体学报,2011(06):1467-1470,1488. |
| [9] | 胡正发,孟涛,张伟,崔跃鹏,罗莉,王银海.Dy3+离子掺杂的全色荧光粉Ca9La（PO4）7的制备及发光特性[J].物理化学学报,2013(10):2271-2275. |
| [10] | Huang, C.-H.;Chen, T.-M.;Cheng, B.-M. .Luminescence investigation on ultraviolet-emitting rare-earth-doped phosphors using synchrotron radiation[J].Inorganic Chemistry: A Research Journal that Includes Bioinorganic, Catalytic, Organometallic, Solid-State, and Synthetic Chemistry and Reaction Dynamics,2011(14):6552-6556. |
| [11] | Oflet G S .Intensities of crystal spectra of rare-earth ions[J].Journal of Chemical Physics,1962,37(03):511-520. |
| [12] | 林琼斐,夏海平,王金浩,张约品,张勤远.Ga2O3组分对Tm 3+掺杂GeO2-Ga2O3-Li2O-BaO-La2O3玻璃的光谱性能影响[J].物理学报,2008(04):2554-2561. |
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