Effect of 100 MeV swift Si⁸⁺ions on structural and thermoluminescence properties of Y₂O₃:Dy³⁺nanophosphor

Abstract

Nanoparticles of Y 2 O 3 :Dy 3+ were prepared by the solution combustion method. The X-ray diffraction pattern of the 900°C annealed sample shows a cubic structure and the average crystallite size was found to be 31.49 nm. The field emission scanning electron microscopy image of the 900°C annealed sample shows wellseparated spherical shape particles and the average particle size is found to be in a range 40 nm. Pellets of Y 2 O 3 :Dy 3+ were irradiated with 100 MeV swift Si 8+ ions for the fluence range of 3 × 10 11_ 3 × 10 13 ions cm −2 . Pristine Y 2 O 3 :Dy 3+ shows seven Raman modes with peaks at 129, 160, 330, 376, 434, 467 and 590 cm −1 . The intensity of these modes decreases with an increase in ion fluence. A well-resolved thermoluminescence glow with peaks at ∼ 414 K (T m1 ) and ∼ 614 K (T m2 ) were observed in Si 8+ ion-irradiated samples. It is found that glow peak intensity at 414 K increases with an increase in the dopant concentration up to 0.6 mol% and then decreases with an increase in dopant concentration. The high-temperature glow peak (614 K) intensity linearly increases with an increase in ion fluence. The broad TL glow curves were deconvoluted using the glow curve deconvoluted method and kinetic parameters were calculated using the general order kinetic equation. ARTICLE HISTORY