| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1494097 | Optical Materials | 2014 | 5 Pages |
•Persistent luminescence of Sr3Al2O5Cl2:Tb3+ were investigated for first time.•The filling of traps was investigated by changing the irradiation time.•The thermoluminescence properties for Sr3Al2O5Cl2:Tb3+ was investigated in detail.
The Tb3+ doped Sr3Al2O5Cl2 phosphors have been synthesized via high temperature solid state reaction and their photoluminescence properties have been investigated. The Sr3Al2O5Cl2:Tb3+ samples emit a green luminescence from 5D4 to 7Fj (j = 6, 5, 4, 3) transition of Tb3+. The phosphorescence can be observed clearly by the naked eyes (0.32 mcd/m2) in the dark for over 1 h after 254 nm irradiation for the 5 min. Thermoluminescence (TL) measurements indicated that the TL glow curve was composed of the peaks located at 62, 142, 250 °C. The filling of traps was investigated by changing the irradiation time. Furthermore, the origin of long persistent luminescence has also been discussed.
