Luminescence, lifetime and quantum yield studies of YVO4:Ln3+ (Ln3+= Dy3+, Eu3+) nanoparticles: Concentration and annealing effects

Hydrothermal synthesis and luminescence properties of GdVO4:Ln3+ (Ln=Eu, Sm, Dy) phosphors

“…8a-c, respectively. It can be seen that the PL intensities of Ln 3+ doped GdVO 4 increase with the increase of rare earth ions doping concentrations, then decrease with further increase of doping concentrations due to the concentration quenching effect [3,5,26,33,35]. Optimal doping appears at a specific concentration.…”

“…With the increase of annealing temperatures, the emission intensity ( 5 D 0 → 7 F 2 ) increased, which can be ascribed to the following two reasons. Firstly, the calcination progress can improve the crystallization of the sample and decrease the concentration of defect [3,5,9,15,17,[33][34][35]. Secondly, the absorbed water or hydroxyl groups on the surface of the as-prepared samples can be removed through the calcination progress [23,34].…”

Energy transfer and colorimetric properties of Eu3+/Dy3+ co-doped Gd2(MoO4)3 phosphors

“…Recently, luminescent materials containing rare earth ions have attracted great interest since they can be potential candidates for many applications in white LED, fluorescent lamps, display devices, solid-state laser, biological labeling and so on [1,2]. Especially, rare earth doped phosphors have played an important role in realizing white LEDs.…”

“…Especially, rare earth doped phosphors have played an important role in realizing white LEDs. Up to now, many host materials such as molybdates [3,4], tungstates [5,6], vanadates [7,2] and aluminates [8,9], etc. were widely studied due to their long longevity, low cost, and excellent chemical and stabilities.…”

Rare earth based nanostructured materials: synthesis, functionalization, properties and bioimaging and biosensing applications

“…This quenching mechanism is connected with the concentration of the active luminescence cations, and it is therefore known as concentration quenching. It is influenced by the nature of the material, the nature of the dopant and its distribution and by the NP morphology [196,197]. An optimization of the doping level is therefore required in order to obtain the nanophosphor with the highest emission intensity.…”