Optimizing the luminescence efficiency of an europium (Eu³⁺) doped SrY₂O₄ phosphor for flexible display and lighting applications

Abstract

This research paper reports the synthesis and luminescence study of an Eu3+ activated SrY2O4 phosphor prepared by a modified solid-state reaction method with varying concentrations of Eu3+ ions (0.1–2.5 mol%).

Decomposition of Luminescent Hydroxyapatite Scaffolds in Simulated Body Fluid

“…HAp:Ce, under excitation at 265 nm, shows a broad band at 360 nm, attributed to the transitions 2 D 3/2 → 2 F 5/2 and 2 D 3/2 → 2 F 7/2 (labeled A and B). − The emission spectrum for HAp:Tb, under excitation at 228 nm, exhibits four peaks centered at 493, 547, 591, and 626 nm (labeled C, D, E, and F) and corresponds to the transitions 5 D 4 → 7 F 6 , 5 D 4 → 7 F 5 , 5 D 4 → 7 F 4 , and 5 D 4 → 7 F 3 , respectively . The emission bands marked G, H, I, and J for HAp:Eu correspond to the transitions 5 D 0 → 7 F 1 , 5 D 0 → 7 F 2 , 5 D 0 → 7 F 3 , and 5 D 0 → 7 F 4 with centers at 594, 617, 655, and 698 nm, respectively …”

“…46 The emission bands marked G, H, I, and J for HAp:Eu correspond to the transitions 5 F 1 , 5 D 0 → 7 F 2 , 5 D 0 → 7 F 3 , and 5 D 0 → 7 F 4 with centers at 594, 617, 655, and 698 nm, respectively. 47 Table 1 summarizes the EDS results of the scaffolds before and after immersion during the 4 weeks of testing in SBF. The Ca/P ratios for all samples are below the stoichiometric value of 1.67 for HAp, indicating that the materials correspond to Ca-deficient HAp.…”

Photoluminescence properties of europium-activated double layered perovskite Sr3Ti2O7 for high-quality lighting applications

“…The quantum yield ( η ) quantifies the proportion of emitted photons ( N emi ) relative to the absorbed photons ( N abs ) in a specimen. 38,39 The subsequent equation has been employed for computing the value of ‘ η ’:…”

Influence of Eu3+ Doping on Physiochemical Properties and Neuroprotective Potential of Polyacrylic Acid Functionalized Cerium Oxide Nanoparticles

“…Characteristic emission with an intense and most prominent red emission (610 nm), which is credited to the 7 F0 → 5 D2 transition, can be observed in the luminescence spectra [21]. The luminescent transition between the 4f levels of rare earth ions is mainly due to the electric and magnetic dipole interactions [22], whereas the emission peak at 590 nm corresponds to the 7 F0 → 5 D1 transition of Eu 3+ [23,24]. These results indicate that the Eu 3+ ions act as luminescence centers in the CeO matrix.…”