title: Self-Activated Photostimulated Luminescence Properties and Stable Storage Capacity of Un-Doped Sr3Al2O5Cl2 Material for Potential Applications in Optical Storage.
abstract: Un-doped Sr3Al2OCl2 material is synthesized by conventional solid state method in reducing atmosphere. It shows intense photostimulated luminescence and the emission band of spectrum covers in 420-800 nm under infrared laser (980 nm) stimulation. Both the emission centers and traps are related to oxygen-deficient defects. Moreover, thermoluminescence indicates that there are at least five types of traps levels in this material. The weak long lasting phosphorescence (30 s) implies the lack of the shallow traps. The deep traps are rich and their storage capacity can be influenced by the releasing progress of the shallow traps. When the shallow traps are completely emptied after 6 h, the stable storage capacity of deep traps is still as large as 51.5%. Also, this material show good photostimulated luminescence under irradiation by infrared laser. Therefore, the un-doped Sr3Al2O5Cl2 material synthesized in reducing atmosphere can be considered as a potential photostimulated material for optical storage. Accordingly, the influence mechanism of traps on photostimulated luminescence is proposed.
authors.forename: Zehua
authors.initials: Z
authors.lastname: Zou
authors.forename: Mingxiao
authors.initials: M
authors.lastname: Duan
authors.forename: Huihui
authors.initials: H
authors.lastname: Li
authors.forename: Jiachi
authors.initials: J
authors.lastname: Zhang
authors.forename: Yuhua
authors.initials: Y
authors.lastname: Wang