Thakur Shashi, Gathania Arvind K
Department of Physics, National Institute of Technology, Hamirpur, HP, 177005, India.
J Fluoresc. 2015 May;25(3):657-61. doi: 10.1007/s10895-015-1551-z. Epub 2015 Mar 10.
Nano phosphors have been prepared with 1 mol% and 5 mol% doping of Eu in vanadate by sol-gel method. X-ray pattern indicated that nano phosphors did not lead to phase change and has tetragonal crystal structure. Excitation spectra revealed that the band at 308 nm arises due to the charge transfer transitions among Eu(3+) and VO4 (3-) ions. The peak position of fluorescence shifted from 518 to 638 nm on varying the excitation wavelength from 257 nm to 318 nm. It is also noticed that the fluorescence intensity increases with the rise of calcination temperatures of the samples.
通过溶胶-凝胶法制备了钒酸盐中铕掺杂量为1摩尔%和5摩尔%的纳米磷光体。X射线图谱表明，纳米磷光体未导致相变，具有四方晶体结构。激发光谱显示，308nm处的能带是由于Eu(3+)和VO4 (3-)离子之间的电荷转移跃迁引起的。当激发波长从257nm变化到318nm时，荧光峰位置从518nm移动到638nm。还注意到，荧光强度随着样品煅烧温度的升高而增加。
