Multicolored and white-light phosphors based on doped GdF3 nanoparticles and their potential bio-applications

Synthesis and luminescence properties of transparent nanocrystalline GdF3:Tb glass-ceramic scintillator

“…It shows an exponential decay and the estimated decay time at 1/e relative intensity is found to be 2.85ms at 543nm, which is slower than the 0.47 ms decay time of conventional Gd 2 O 2 S:Tb X-ray phosphor. xix Sayed et al reported a 2.95ms decay time from GdF 3 :15mol%Tb nanoparticles prepared by colloidal synthesis, xx which is close to the result from our samples.…”

Morphology control of uniform CaMoO4microarchitectures and development of white light emitting phosphors by Ln doping (Ln = Dy3+, Eu3+)

“…The fitting parameters are presented in Table 5, along with the average life-time values, <τ>, calculated as: where t f represents the time required for the luminescence signal to reach the background. The biexponential decay observed for our sample is in agreement with previous reports on this phosphor, 13,21,40,41 according to which, the short component (τ = 390 ± 17 µs) is due to Eu 3+ ions located close the nanoparticles surface and are influenced by OH-species or surface defects which act as luminescence quenchers, 42,43 whereas the long component (τ = 739 ± 37 µs) is ascribed to the Eu 3+ ions located in the inner part of the particles, where surface effects are not present. It should be noted that the <τ> value obtained for our sample (600 ± 30 µs) is very close to the that reported for this kind of phosphor having the same Eu 3+ content (662 µs).…”

Luminescent Rare-earth-based Nanoparticles: A Summarized Overview of their Synthesis, Functionalization, and Applications

“…Because of their unique optical properties, lanthanide-doped materials are also widely used for optoelectronic applications, which include laser sources [89], fiber-optic communication [90], light-emitting diodes and solid-state lighthening [91][92], and color display devices [93]. These properties have been extensively studied in bulk materials since the last century, and nowadays the design and the study of the properties and applications of the nanostructured materials attracts [96], and Dy 3+ , Tb 3+ , Eu 3+doped GdVO4 [46].…”