摘要
利用电沉积方法制备了Er^(3+)/Yb^(3+)共掺杂的Y_2O_3上转换荧光薄膜,采用X-射线衍射,扫描电子显微镜等技术对纳米颗粒进行表征.结果显示,Y_2O_3∶Er^(3+)/Yb^(3+)薄膜由均匀纳米薄片组成,纳米片厚度为30 nm左右.在980 nm激光激发Y_2O_3∶Er^(3+)/Yb^(3+)共掺纳米体系时,观测到了因此而产生的上转换荧光辐射.应用激光光谱学的方法,分析了Er^(3+)/Yb^(3+)共掺杂Y_2O_3荧光光谱的性质,研究了离子浓度对上转换辐射荧光的跃迁强度和弛豫速率的影响,通过对相关能级的分析阐明了上转换辐射荧光产生的机理.
Er3＋ and Yb3＋ co-doped upeonversion fluorescence film is prepared by electrical deposition way in solution of 0. 01 mol/L Y（ NO3 ） 3, 0. 001 mol/L Er（ NO3 ） 3 and 0.001 mol/L Yb（ NO3 ） 3 under current density of 2.0 mA/cm2 at 70℃ for 120 min, followed annealing at 500~C for 4 h. The XRD patterns show that the Y203is cubic structure and can be well indexed with JCPDF card （ la-3 （206） ）. SEM show that the thickness of （ Er2~ Yb^s ~ Y78~ ） 2 03 Nanoflakes is about 30 nm. Using 980 nm laser to excit- ed the sample, we observed the upconversion luminescence from Er3＋ was observed. The influence of the concentration of Er3＋ and Yb3＋ on the upconversion intensity and relaxation rate were investigated with spectroscopy. Finally, the mechanism of the upconve- rsion were ensured with energy level and transition.
出处
《宁夏师范学院学报》
2015年第6期41-46,59,共7页
Journal of Ningxia Normal University
基金
运城学院院级项目(YQ-2010013)
