Investigation of thermoluminescence and photoluminescence properties of Tb³⁺, Eu³⁺, and Dy³⁺ doped NaYF₄ phosphors for dosimetric applications

Abstract

Hexagonal phase sodium yttrium fluoride activated with lanthanide ions; Tb3+, Eu3+ and Dy3+ doped NaYF4 phosphors were synthesized via simplistic hydrothermal method. The photoluminescence studies demonstrated green, red and blue...

Zinc silicate phosphor: Insights of X‐ray induced and temperature enabled luminescence

“…A high‐temperature peak shift and higher peak intensity were observed in the Zn 2 SiO 4 phosphor calcinated at 900°C due to the defect maintained in the Zn 2 SiO 4 crystal lattice. The highly intense TL glow peak at high temperatures retained the deeper trap, with better stability, a slower rate of fading, and superior storage phosphors [44]. Conversely, a low intense TL peak at low temperatures was observed, which was likely to fade faster due to the shallower traps.…”

“…As seen in Figure 8, the Zn 2 SiO 4 sample calcinated at 900°C produced two highly intense peaks at 282°C and 354°C. Furthermore, peaks 1 and 2 exhibited a peak shift towards higher temperatures, suggesting the presence of deep traps in the prepared sample, and thus showing enhanced dosimetric behaviour [44].…”

“…The Zn 2 SiO 4 phosphor calcinated at 900°C was irradiated with various X‐ray doses to evaluate the TL glow curve [44]. The linear response of the TL glow curve was observed for various radiation doses, as shown in Figure 9.…”

“…The value of the geometric form factor can be used to predict the order of kinetics for the TL glow peak. The following equation determines the value of [44]: …”

“…The number indicates general order kinetics if it lies within the 0.42–0.52 range. The form factor value in this work was estimated to be 0.49 for peak 1 and 0.46 for peak 2, indicating that the TL glow peak kinetic order was between 1 and 2, which is regarded as a general order of kinetics [44, 52].…”