| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5400138 | Journal of Luminescence | 2014 | 6 Pages |
Abstract
A series of new luminescent emission-tunable phosphors La6Ba4(SiO4)6F2:Ce3+,Tb3+ with apatite structure have been synthesized by a high temperature solid-state reaction. X-ray diffraction, photoluminescence (PL) emission and excitation spectra, lifetime, as well as the effect of Tb3+ concentration were employed to characterize the resulting samples. The PL spectrum of La6Ba4(SiO4)6F2:Ce3+,Tb3+ phosphor contains both the asymmetric broad-band blue emission (Ce3+ ion) and the line-type green emission (Tb3+ ion). The increased Tb3+ concentration induced the emitting colors to shift from blue to green region by the naked eye. Meanwhile, the energy transfer between Ce3+ and Tb3+ is thoroughly investigated, and the energy-transfer efficiency from Ce3+ to Tb3+ ion is also calculated. The results indicated that these phosphors could be considered as double emission phosphors for n-UV excited white light-emitting diodes.
Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Qingfeng Guo, Libing Liao, Zhiguo Xia,