论文部分内容阅读
以乙二胺四乙酸(EDTA)为络合剂,应用水热法合成了Pr3+/Yb3+共掺的六方相NaYF4和四方相LiYF4微米晶体.研究了晶相和电声子相互作用对Pr3+离子荧光特性的影响.在波长为976.4nm激光的激发下,在六方相NaYF4:Yb3+/Pr3+和四方相LiYF4:Yb3+/Pr3+中分别获得了赤眼可观的上转换荧光发射.与六方相NaYF4:Yb3+/Pr3+微米晶体的荧光相比,源于四方相LiYF4:Yb3+/Pr3+微米晶体中荧光发射谱线变窄、强度变弱并发生蓝移.分析研究了荧光上转换过程、晶相结构及上转换荧光强度对Yb3+离子浓度的依赖关系.
Hexagonal phase NaYF4 and tetragonal phase LiYF4 were co-doped with Pr3 + / Yb3 + by hydrothermal method using ethylenediaminetetraacetic acid (EDTA) as complexing agent.The effects of crystal phase and electro phonon interaction on Pr3 + ion fluorescence The up-conversion fluorescence emission of the red-eye was obtained in the hexagonal NaYF4: Yb3 + / Pr3 + and the tetragonal LiYF4: Yb3 + / Pr3 + under the excitation of the laser wavelength of 976.4nm, respectively.Compared with the hexagonal NaYF4: Yb3 + / Pr3 + Pr3 + microcrystal, the fluorescence emission line from tetragonal LiYF4: Yb3 + / Pr3 + microcrystal becomes narrower, the intensity becomes weaker and the blue shift occurs.The fluorescence upconversion process, crystal phase structure and up-conversion fluorescence Intensity dependence of Yb3 + ion concentration.