The trivalent dysprosium-doped yellow phosphor is an important component for realizing single-matrix white light. However, concentration quenching and thermal quenching greatly limit its application. White light phosphors, Li₃Ba₂Gd₃(WO₄)₈:Dy³⁺,Tm³⁺, with a stratified scheelite structure were prepared via a high-temperature solid-reaction. Calculated using the Kubelka–Munk model, the band gap of the host is 3.71 eV, which is suitable for near-ultraviolet white LEDs. The matrix is a highly disordered monoclinic crystal with a layered structure, which suppresses the concentration quenching effect of Dy³⁺ and achieves a relatively high doping concentration. A small amount of Tm³⁺ (3%) was co-doped with Dy³⁺ to obtain standard white light, whose CIE coordinate locates at (0.3370, 0.3213). Furthermore, the thermal quenching properties of Li₃Ba₂Gd₃(WO₄)₈:12%Dy³⁺,3%Tm³⁺ were investigated, and it was found that the intensity of the phosphor at 422 K maintains 82.52% of that at room temperature, and remained at 71.34% when the temperature increased to 472 K. The results indicate that the Li₃Ba₂Gd₃(WO₄)₈:Dy³⁺,Tm³⁺ phosphor can be a potential single-phased white-light-emitting phosphor for NUV white LEDs.

A novel and efficient F⁻ anion doping strategy is proposed for enhancing upconversion luminescence in NaGd(MoO₄)₂:Yb³⁺/Er³⁺ nanophosphors.

Morphological control, formation mechanism and tunable photoluminescence of NaGd(MoO₄)₂:Eu³⁺,Tb³⁺microcrystals synthesized by a facile hydrothermal method.

In this paper, Gd(OH)₃ microcrystals (MCs), with hierarchical dumbbell-like structures, were prepared via a one-step hydrothermal route using KOH as the alkaline source and ethylenediaminetetraacetic acid as the chelating reagent. XRD patterns and SEM images showed the typical hexagonal phase and the three-dimensional micro-dumbbell structure with an average length of 9 μm and diameter of 7 μm. The time dependent morphogenesis, the growth kinetic mechanism and the intrinsic electric field were exploited to demonstrate the formation mechanism of the Gd(OH)₃ micro-dumbbell hierarchical architectures. Gd₂O₃ hierarchical MCs and their lanthanide-doped counterparts could also be obtained via heat treatment. Gd₂O₃:Yb³⁺/Er³⁺ hierarchical MCs exhibited relatively pure visible emission under near-infrared (980 nm) and violet (379.4 nm) excitation. Besides, NIR emission from Yb^{3+ 2}F_5/2 and Er^{3+ 4}I_13/2 was also found, which may be of particular interest for telecommunications applications. The possible energy transfer mechanisms were discussed. Moreover, Gd₂O₃ samples also have considerable magnetic mass susceptibility with a value of 1.321 × 10⁻⁴ emu g⁻¹ Oe⁻¹ by magnetic property studies. This work provides another path for preparing Gd₂O₃ hierarchical MCs.