【摘要】 利用水热法成功合成了近红外量子剪裁荧光粉LuBO3∶15%Tb3+,x%Yb3+(x=0,1,2,4,8,12)。通过X射线衍射(XRD)、光致发光谱(PL)、激发谱(PLE)和荧光寿命测试了合成物质的物相结构与发光性质。在286 nm(Tb3+:7F6→5D)紫外光激发下,观察到了Tb3+:5D4→7FJ(J=6,5,4,3)可见波段特征发射光和Yb3+:2F5/2→2F7/2的近红外光。研究了Yb3+浓度与激发发射光谱和荧光寿命之间的关系,表明Tb3+和Yb3+之间存在能量传递。当Tb3+和Yb3+掺杂摩尔浓度分别为15%和2%时,近红外发射最强。计算得知,其最大下转换量子效率为160.74%。更多还原

【Abstract】 Near-infrared( NIR) quantum cutting LuBO3∶ 15% Tb3 +,x% Yb3 +( x = 0,1,2,4,8,12)phosphors were synthesized by hydrothermal method with further heat treatment. The phase constitution were analyzed systemically with the aid of X-ray diffraction( XRD). The optical properties of the Lu BO3∶ Tb3 +, Yb3 +were characterized by photoluminescence( PL), excitation spectrum( PLE) and fluorescence lifetime. The emission from5D4→7FJ( J = 6,5,4,3) of Tb3 +was observed under excitation of 286 nm,in which the dominant emission was at 543 nm. The NIR emission at around 950-1100 nm from Yb3 +:2F5 /2→2F7 /2was observed under the same excitationg. This paper studies the relationship between the Yb3 +concentration and the excitation and emission spectra and the fluorescence lifetime.The results show that the energy transfer exists between Tb3 +and Yb3 +. When doping concentration of15% for Tb3 +,2% for Yb3 +,near infrared luminescence was the strongest. The maximum quantum efficiency approaches 160. 74%.更多还原