Thermoluminescence properties of Eu‐doped and Eu/Dy‐codoped Sr₂Al₂SiO₇ phosphors

Abstract

We report the thermoluminescence properties of Sr Al SiO :Eu and Sr Al SiO :Eu Dy phosphors. These phosphors were prepared by a high-temperature solid-state reaction method. The prepared phosphors were characterized by X-ray diffraction. A 254 nm source was used for ultraviolet (UV) irradiation and a Co source was used for γ-irradiation. The effect of heating rate and UV-exposure were examined. The thermoluminescence temperature shifts to higher values with increasing heating rate and thermoluminescence intensity increases with increasing UV exposure time. The trapping parameters such as activation energy (E), order of kinetics and frequency factor (s) were calculated by peak shape method. The effect of γ- and UV-irradiation on thermoluminescence studies was also examined.

Energy Level Locations of Lanthanide Ions in Strontium-Aluminosilicate Phosphors

“…Email address: hovantuyen@gmail.com https//doi.org/ 10.25073/2588-1124/vnumap.4594 [1], steady crystalline structure [2]. In some recent studies, Eu 2+ -doped SAS materials have been synthesized to obtain green emission phosphor [3]; long persistent luminescence and thermoluminescence properties of Eu and Ln 3+ (Dy 3+ , Ce 3+ , Tm 3+ ) co-doped into SAS host materials have also reported [4][5][6][7][8]; Energy transfer between Ce 3+ and Dy 3+ , Eu 3+ ions as well as the concentration quenching of Ce 3+ in SAS materials have been studied [9][10][11]. Besides that, the fabrication method for SAS phosphors has been studied and reported in several papers [12,13] and some other studies have focused on the controllable photoluminescence or thermal stablility of the prepared materials [1,14].…”