摘要
用水热法制备了Dy3+单掺及Dy3+,Er3+双掺GdVO4纳米荧光粉,通过X射线衍射(XRD)、扫描电子显微镜(SEM)、红外光谱仪(FTIR)和荧光(FL)光谱对合成样品的结构、形貌和发光性能进行表征;探讨了Dy3+掺杂浓度、络合剂对GdVO4:Dy3+纳米晶的结构、形貌和发光性能的影响;考察了不同波长的近红外光和紫外光激发的GdVO4:Dy3+,Er3+,得到不同颜色的上转换和下转换荧光光谱。以760~830 nm近红外光和210~380 nm紫外光激发GdVO4:Dy3+纳米晶,可获得Dy3+蓝绿色双模发光;其中蓝光来自于Dy3+离子的4F9/2→6H15/2跃迁,绿光由Dy3+离子4F9/2→6H13/2跃迁产生。
The Dy^3＋doped and Dy^3＋,Er^3＋codoped GdVO4luminescence nanoparticles were synthesis by hydrothermal method. The X-ray diffraction（ XRD） analyzed samples＇ crystal structure,the scanning electron microscope（ SEM）,infrared spectrometer（ FT-IR） and the fluorescence（ FL） spectrum were applied to determine sturcture, morphology and luminescent properties of the synthesized samples. The effect of the concentration of Dy^3＋and com-plexing agent to GdVO4： Dy^3＋nanocrystalline on the crystal structure,morphology and luminescence properties was investigated. The different wavelength light of the near-infrared and ultraviolet excitation GdVO4： Dy^3＋,Er^3＋ produced different colour up-conversion and down-conversion fluorescent emission. Under near-infrared 760 ～ 830 nm and near-ultraviolet 210 ～ 380 nm excitation,the GdVO4： Dy^3＋nanocrystalline could obtain two-mode Dy^3＋bluegreen emission. The blue emitting light resulted from the transition of ^4F9 /2→^6H15 /2of Dy^3＋,green emitting light was from the transition of ^4F9 /2→^6H13 /2of Dy^3＋.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2014年第3期289-296,共8页
Journal of the Chinese Society of Rare Earths
基金
辽宁省教育厅资助项目(L2013166)
