Y(P,V)O4:Dy3+ phosphors for white light generation: Emission dynamics and host effect

Tunable luminescence properties of the novel Tm3+- and Dy3+-codoped LiLa(MoO4)x(WO4)2−x phosphors for white light-emitting diodes

“…When Dy 3+ is located at a low symmetry site (without inversion symmetry), the 4 F 9/2 → 6 H 13/2 transition emission will dominant in the emission 25 spectra. 34 In the tetragonal scheelite structure LiLa(WO 4 ) 2 , Dy 3+ ions are expected to occupy the La 3+ sites (without an inversion center), therefore, the 574 nm emission peak corresponding to the 4 F 9/2 → 6 H 13/2 transition is much stronger than other emissions, which is consistent with the structural study. 30 The emission spectra of LiLa(WO 4 ) 2 :yDy 3+ (y=0.005, 0.01, 0.02, 0.03, 0.04, 0.05) phosphors under excitation at 390 nm are displayed in Fig.…”

Influence of Dy3+ Ions on the Optical Characteristics of Nanoscaled Y1−xDyxVO4 Phosphors

“…Under high-temperature treatment for 12 h, phosphors with a particle size around 0.5 μm could be synthesized. (12,13) Additionally, the chemical coprecipitation method is a common method to synthesize YVO 4 phosphor; it usually takes several days to complete the entire process. (14)(15)(16) In this study, the modified chemical coprecipitation method was adopted to enable the synthesis.…”

Comparative study of Y0.9Er0.1V1−xPxO4 nanophosphors with x = 0, 0.1, 0.5, 0.9 and 1 prepared by sol-gel and hydrothermal processes

“…In recent years, however, new sol-gel processes [27] and hydrothermal synthesis procedures [28][29][30] have been successfully developed with the aim of obtaining YV 1-x P x O 4 solid solutions at low temperatures, providing non-agglomerated nanoparticles with high purity and homogeneity. In general, the hydrothermal method allows to carry out reactions at lower temperatures than those used in the sol-gel process [32,33]. However, as it has been previously reported, the hydrothermal synthesis requires subsequent heating treatments in order to obtain the corresponding pure phases [28,32] or it is carried out at relatively high temperatures [29,30].…”

“…In general, the hydrothermal method allows to carry out reactions at lower temperatures than those used in the sol-gel process [32,33]. However, as it has been previously reported, the hydrothermal synthesis requires subsequent heating treatments in order to obtain the corresponding pure phases [28,32] or it is carried out at relatively high temperatures [29,30]. On the other hand, modifications introduced in the preparation method might lead to changes in the crystallinity and morphology of the resulting particles, which in turn directly affect the intensity of the luminescence emission bands [29,33,34].…”