Search

The Photoluminescence (PL) analysis of rare earth Dy ion activated fluoride material base phosphor are prepared by synthesis of combustion route and characterized by X-ray diffraction (XRD), by Photoluminescence (PL) techniques & CIE coordinate with color purity properties have been reported. In the photoluminescence excitation spectrum of prepared Ba2Zn7F18: Dy phosphor shows excitation peaks from ranging 250 nm to 400 nm due to 4f → 4f transitions of Dy3+ ions. In the PL emission spectrum of Dy3+ ion under the 348 nm excitation, it gives two bands i.e. Photoluminescence emission at 482 nm (in blue region) due to its transition 4F9/2 → 6H15/2 and at 574 nm (yellow region) emission and its due to 4F9/2 → 6H13/2 transitions give blue-yellow emissions. The 300 nm to 400 nm wavelength range is commonly used in solid-state lighting phosphors as a mercury-free excitation source. Dysprosium-doped materials have been found to exhibit highly efficient photoluminescence (PL) properties, making them excellent candidates for use as white light emitting diodes (LEDs) or solid-state lighting phosphors. [ABSTRACT FROM AUTHOR]

In this study a novel TL phosphor CaMg3(SO4)4:Dy3+ was prepared by acid distillation method. The TL response of this phosphor towards y-rays and carbon ion beam was tested. Good dosimetric glow curve was observed which is stable against both the type of radiations. The CaMg3(SO4)4:Dy3+ phosphor doped with 0.2 mol% of Dy3+, irradiated with y-ray shows nearly equal sensitivity to that of commercially available CaSO4:Dy TLD phosphor whereas 3.5 times more sensitivity than CaSO4:Dy, when irradiated with carbon ion beam. The change in glow peak intensities and glow peak temperature with variation in irradiation species and energy of ion beam is discussed here. The effect of these on trapping parameters is also illustrated. [ABSTRACT FROM AUTHOR]