Optical transition and luminescence properties of Sm³⁺‐doped YNbO₄ powder phosphors

Abstract

A series of YNbO4: Sm3+ powder phosphors with different doping concentrations were synthesized by a traditional high‐temperature solid‐state reaction method. The crystal structure of the obtained samples was characterized by means of X‐ray diffraction. Concentration quenching, energy‐transfer mechanism, and luminescence thermal stability of YNbO4: Sm3+ samples were studied through the fluorescence spectra and decays. It was concluded that electric dipole‐dipole interaction was the dominant energy‐transfer mechanism between Sm3+ ions according to both Van Uitert's model and Dexter's model. Using the Arrhenius model, crossover process was proven to be responsible for the luminescence thermal quenching of Sm3+. Moreover, a novel approach for evaluating the optical transition properties of Sm3+ ion in YNbO4 powders using the diffuse‐diffraction spectrum and fluorescence decay was examined in the framework of Judd‐Ofelt (J‐O) theory. It was confirmed that the J‐O parameters Ωλ (λ = 2, 4, 6) of Sm3+ in YNbO4 powder were reliable by comparing the radiation transition rate with the measured emission results.

Effect of anionic group [SiO4]4−/[PO4]3− on the luminescence properties of Dy3+-doped tungstate structural compounds

“…Inorganic luminescent materials have historically attracted considerable attention due to their characteristics such as long decay lifetime [1], easy preparation, low toxicity, and high luminous efficiency [2][3][4]. Rare earth luminescent materials have considerable application potential because of their unique 4f orbit, which can be pumped to excited energy levels to emit colorful light under excitation [5,6].…”

“…Silicate has been widely studied as a satisfactory matrix for fluorescent materials due to its excellent optical properties, chemical stability, and structural diversity [21,22]. On the basis of these advantages, [ 3substitution on the properties of the tungstate matrix fluorescent materials and elucidate the effect of anion substitution on their crystal structures, a series of comparative experiments were conducted to evaluate the different properties after the replacement of the crystal phase and anions in the samples. The luminescence properties of the doped samples were discussed in the three modified matrices, including excitation spectrum, emission spectrum, decay time, chromaticity diagram, and luminescence mechanism of the doped ions in them.…”

Enhanced Visible Light-Driven Photocatalytic Activities and Photoluminescence Characteristics of BiOF Nanoparticles Determined via Doping Engineering

“…/ 2 , and 11 / 2 ) within 4f n configurations. 23,24 Furthermore, the BiOX (X = F, Cl, Br, or I) compounds would be the proper luminescent hosts for the Sm 3+ ions because the Bi 3+ and Sm 3+ ions possess similar ionic radii and the same charge. To date, the photoluminescence properties of the Sm 3+ -activated BiOCl and BiOBr compounds have been reported.…”

“…Thomas et al reported that the Sm 3+ -doped g-C 3 N 4 nanosheets exhibited superior photocatalytic behaviors compared to those of the undoped g-C 3 N 4 nanosheets . In comparison, the Sm 3+ ion, as a member of the rare-earth ions, has been considerably studied as a photoluminescent activator because it can emit red/orange emissions triggered by the 4 G 5/2 → 6 H J transitions ( J = 5 / 2 , 7 / 2 , 9 / 2 , and 11 / 2 ) within 4f n configurations. , Furthermore, the BiOX (X = F, Cl, Br, or I) compounds would be the proper luminescent hosts for the Sm 3+ ions because the Bi 3+ and Sm 3+ ions possess similar ionic radii and the same charge. To date, the photoluminescence properties of the Sm 3+ -activated BiOCl and BiOBr compounds have been reported. , Nevertheless, to the best of our knowledge, there is no research on the photocatalytic activity and photoluminescence characteristics of the Sm 3+ -activated BiOF compounds.…”

Effect of Anionic Group [SiO4]4-/[PO4]3- on the Luminescence Properties of Dy3+-Doped Tungstate Structural Compounds

“…Inorganic luminescent materials have historically attracted considerable attention due to their characteristics such as long decay lifetimes [1], easy preparation, low toxicity, and high luminous efficiency [2][3][4]. Rare earth luminescent materials have considerable application potential because of their unique 4f orbit, which can be pumped to excited energy levels to emit colorful light under excitation [5,6].…”