YAl_3(BO_3)_4∶Dy^(3+)荧光粉的制备及发光性能

Preparation and Luminescence Properties of YAl_3(BO_3)_4∶Dy^(3+) Phosphors

利用溶胶-凝胶法制备了Dy3+掺杂的YAl3(BO3)4荧光粉。通过X射线衍射仪(XRD)、荧光(FL)光谱仪对所合成样品的结构和发光性能进行表征。研究了Dy3+离子掺杂浓度和焙烧温度对YAl3(BO3)4∶Dy3+荧光粉的结构和发光性能的影响。结果表明:Y1-xAl3(BO3)4∶Dy3x+在Dy掺杂摩尔分数为x=0.05,焙烧温度为1 100℃时的发光强度最大。Y0.95Al3(BO3)4∶Dy30.+05荧光粉在774 nm波长光激发下,最强发射峰位于575nm。该荧光粉可将700～900 nm和290～450 nm范围内的光转换为染料敏化电池吸收的575 nm附近可见光。

Dy3＋ ions doped YAl3（BO3）4 phosphors were prepared by sol-gel method.Their structure and luminescence properties were characterized by X-ray diffraction（XRD） analysis and fluorescence spectrometry（FL）.The preparation conditions of the precursor synthesis,including the Dy3＋ concentration and crystallization temperature were investigated.The results showed that the luminescence intensity of YAl3（BO3）4∶Dy3＋ is the biggest at the calcination temperature of 1 100 ℃.The optimum doping mole fraction of Dy3＋ ions was x=0.05.The main emission peak was about 575 nm excited at 774 nm.The YAl3（BO3）4∶Dy3＋ phosphors can convert spectra band from 700 to 900 nm and from 290 to 490 nm into visible light around 575 nm which is absorbed strongly by the dye sensitized solar cells.