Synthesis, structural and luminescence properties of $$\hbox {Dy}^{3+}$$ activated $$\hbox {GdAlO}_{3}$$ phosphors by a solid state reaction method under a $$\hbox {N}_{2}$$ atmosphere

Abstract

Dysprosium (Dy 3+) ion-doped GdAlO 3 nanophosphors were fabricated by using a high temperature solid state reaction method. X-ray diffraction measurements were used to investigate the phase and crystal size of these phosphors. The morphology of the powder was observed by scanning electron microscopy. The band structure of the phosphor was determined by recording the UV absorption spectra and Tauc plot. The optical behaviour of the phosphors was determined by measuring their photoluminescence (PL) spectra. The PL spectra show characteristic blue (489 nm) and green (567 nm) emissions corresponding to the energy level transitions of Dy 3+ .

Emerging green light emission of Er3+‐activated single phased GdAlO3 phosphors for lighting applications

“…Moreover, a wide vibration band at 3433 cm −1 (high frequency vibrations) is ascribed to the existence of non‐radiative –OH group. [ 38 ]…”

“…(high frequency vibrations) is ascribed to the existence of nonradiative -OH group. [38] T A B L E 4 Diffraction characteristics (crystallite size, microstrain, dislocation density) of fabricated GdAlO 3 (GAP) and Gd F I G U R E 7 TEM profile for the optimized Gd 0.95 AlO 3 :0.05Er 3+ nanosample.…”

Influence of the synthesis pathway upon the thermoluminescent response of gadolinium aluminate matrix phosphors

“…Besides, doping the host with low amounts of rare earth ions yielded an enhanced signal intensity [4,7]. In addition to the mentioned works, two more were made by Tamrakar R et al [8] and Tiwari S et al [9], respectively, that studied the stimulated luminescent response of the GAO matrix synthesized by solid-state reaction. They arrived at the same conclusion regarding the favorable influence of rare earth ion activation on matrix sensitization.…”