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Nd3+/Yb3+/Tm3+共掺杂NaY(WO4)2 纳米晶的制备及其上转换发光性能
作者:史忠祥 王晶 关昕 
单位:大连交通大学 辽宁省无机超细粉体制备及应用重点实验室 辽宁 大连 116028 
关键词:上转换发光 钨酸钇钠 稀土离子掺杂 聚乙二醇 能量传递 
分类号:TB321
出版年,卷(期):页码:2018,46(1):0-0
DOI:
摘要:

 采用水热法合成出Nd3+/Yb3+/Tm3+共掺杂NaY(WO4)2 纳米晶。通过X 射线衍射、扫描电子显微镜、红外光谱、荧光光谱等,对合成样品的晶体结构、形貌和上转换发光性能进行表征。结果表明:合成的样品均为纯四方相的NaY(WO4)2,粒径在50~55 nm 之间。利用聚乙二醇(PEG-2000)作为表面活性剂制得的上转换纳米粒子,尺寸小、分散性好并且具有一定的水溶性。在808 nm 近红外光激发下,观察到469 nm 处的蓝光发射峰以及539 nm 处的绿光发射峰,其中蓝光来自Tm3+的1G4?3H6 能级跃迁,绿光由Tm3+的1D2?3H5 跃迁产生。并研究了共掺杂体系中Nd3+?Yb3+?Tm3+的能量传递过程及其上转换发光机理。

 Nd3+/Yb3+/Tm3+ co-doped NaY(WO4)2 nanocrystals were prepared by a hydrothermal method. The crystal structure,morphology and up-conversion luminescent properties of samples were characterized by X-ray diffraction, scanning electronmicroscopy, Fourier transform infrared spectroscopy and luminescence spectroscopy, respectively. The results indicate that all thesynthesized samples are a pure tetragonal phase of NaY(WO4)2, and the particle sizes are 50–55 nm. The up-conversion nanoparticleshave a small size,well-dispersive property and water solubility by adding polyethylene glycol (i.e., PEG-2000) as a surfactant. ForNaY(WO4)2:Nd3+/Yb3+/Tm3+, a blue emission peak at 469 nm and a green emission peak at 539 nm appear under 808-nm excitation.The blue emitting light results from the energy level transition of 1G4?3H6 of Tm3+, green emitting light is from the transition of1D2?3H5 of Tm3+. In addition, the energy transfer process and the up-conversion luminescence mechanism of Nd3+? Yb3+?Tm3+ inco-doped system were also investigated.

 
基金项目:
国家重点研发计划项目(2017YFB0310300);国家自然科学基金(51274052);辽宁省自然科学基金 (201602134);辽宁省教育厅(JDL2016002) 资助项目。
作者简介:
史忠祥(1989—),男,博士研究生。
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