776nm近红外光激发下NaY(WO_4)_2:Dy^(3+),Ho^(3+)上转换发光粒子的光学特性  

Upconversion luminesce particles of NaY(WO_4)_2: Dy^(3+),Ho^(3+) at 776 nm laser excitation

作　　者：王雅静[1] 史忠祥 肖林久[1] 谢颖[1] 李娟娟[1] 魏蕾[1] 

机构地区：[1]沈阳化工大学应用化学学院,辽宁沈阳110142

出　　处：《中南大学学报（自然科学版）》2016年第8期2608-2613,共6页Journal of Central South University:Science and Technology

基　　金：辽宁省教育厅资助项目(L2013166)~~

摘　　要：采用水热法制备出NaY(WO+4)+2:Dy^(3+),Ho^(3+)上转换荧光材料。通过X线粉末衍射、扫描电子显微镜、激发光谱以及发射光谱对该材料特性进行表征。研究Dy^(3+)与Ho^(3+)的掺杂比例及退火温度对上转换发光效果的影响,并确定了最佳反应条件。探讨Dy^(3+)与Ho^(3+)的能量传递过程及上转换发光机制。研究结果表明:通过776 nm近红外光激发NaY(WO+4)+2:Dy^(3+),Ho^(3+),观察到Dy^(3+)的480 nm处蓝光发射峰以及577 nm处的黄光发射峰。其中蓝光主要来自于Dy^(3+)的~4F_(9/2)→~6H_(15/2)跃迁,黄光由Dy^(3+)的~4F_(9/2)→~6H_(13/2)跃迁产生。Trivalent dysprosium and trivalent holmium ions doped NaY（WO_4）_2 upconversion luminescence materials were prepared by hydrothermal method.The properties of the resulting materials were characterized by X-ray diffraction, scanning electron microscopy, excitation spectra and emission spectra.The effects of ratio of concentration of dysprosium and holmium ions and temperature annealed were studied.The optimum reaction conditions for NaY（WO_4）_2： Dy（3＋）, Ho（3＋）were obtained. The upconversion mechanisms and the energy transfer between Dy（3＋） and Ho（3＋） were discussed. The results show that at 776 nm excitation NaY（WO_4）_2： Dy（3＋）, Ho（3＋） can observe the 480 nm blue emission peak and yellow emission peak at 577 nm.The blue emitting light results from the transition of 4F_（9/2）→6H_（15/2） of Dy（3＋）, and yellow emitting light from the transition of 4F_（9/2）→6H_（13/2） of Dy（3＋）.

关 键 词：上转换 NaY(WO4)2:Dy3+ Ho3+ 能量传递 

分 类 号：TQ422[化学工程]