Color-tunable properties of Eu3+- and Dy3+-codoped Y2O3 phosphor particles

Abstract

Rare-earth phosphors are commonly used in display panels, security printing, and fluorescent lamps, and have potential applications in lasers and bioimaging. In the present study, Eu3+- and Dy3+-codoped uniform-shaped Y2O3 submicron particles were prepared using the urea homogeneous precipitation method. The structure and morphology of the resulting particles were characterized by X-ray diffraction, field emission scanning electron microscope, and field emission transmission electron microscope, whereas their optical properties were monitored by photoluminescence spectroscopy. The room-temperature luminescence color emission of the synthesized particles can be tuned from red to yellow by switching the excitation wavelength from 254 to 350 nm. The luminescence intensities of red and yellow emissions could be altered by varying the dopant concentration. Strong quenching was observed at high Eu3+ and Dy3+ concentrations in the Y2O3 host lattice.

Emission properties of Ln (Eu, Tb, Dy, Er)-doped Y2O3 nanoparticles synthesized by surfactant-assembly and their applications in visible color-tuning

“…3a, it can be seen that the dominant emission bands for Dy@YNP appear at 484 nm and 577 nm, where the intensity of the latter is about 3 times that of the former. Such a trend in the emission intensity is also reported for Dy 3+ -Eu 3+ co-doped Y 2 O 3 particles [23]. Similar trends were found for Er@YNP [24] and Tb@YNP [25].…”

Unconventional Production of Bright White Light Emission by Nd-Doped and Nominally Un-Doped <inline-formula> <tex-math notation="TeX">$\hbox{Y}_{2}\hbox{O}_{3}$</tex-math></inline-formula> Nano-Powders

“…A number of workers have found anti-Stokes wide band emission by exciting nano-crystals of compounds in which Nd 3þ was one of the dopants [10] or a full stoichiometric part of the system [8], [11], [12].…”

Fabrication of bifunctional core-shell Fe3O4 particles coated with ultrathin phosphor layer

“…Spherical magnetic Fe 3 O 4 particles were prepared using a solvothermal method according to reported protocols [15,16]. Core-shell Fe 3 O 4 @Y 2 O 3 :Tb 3+ particles were further prepared using a facile urea-based homogeneous precipitation method [17-19]. In a typical process, rare-earth nitrates (0.0005 mol, Y/Tb = 99:1 mol%) were added to 40 ml of deionized (DI) water.…”