Synthesis And Luminescence Properties Of Rare Earth Ions Activated Oxysalt Multicolor Luminescent Materials

The properties of the luminescent materials are related with their particle size and morphology. Therefore, we can control the particle size and morphology of nano/micromaterials to explore their luminescent properties and reveals their basic principle.Now it becomes a researching hotspot in field of chemical and materials subject. In this paper,we mainly synthesized a series of rare earth ions activated oxysalt luminescent materials by hydrothermal and sol-gel routes and investigated their morphology and luminescence properties in detail.Well-defined LaBO3 hierarchical architectures have been successfully synthesized by adesigned hydrothermal conversion method. La(OH)3 nanowires were prepared through a simple hydrothermal process. Subsequently, uniform LaBO3 architectures were synthesized at the expense of the La(OH)3 nanowires during a hydrothermal process. The whole process was carried out under aqueous conditions without the use of any organic solvent, surfactant, or catalyst. The as-obtained La BO3:Tb3+ product shows strong characteristic green emission under ultraviolet or low-voltage electron beam excitation, which might find potential applications in fields of fluorescent lamps, display systems, and optoelectronic devices.Uniform and well-dispersed SrMoO4:Ln3+(Ln=Tb, Eu, Dy, Sm) luminescent materials have been successfully synthesized by a simple hydrothermal route using trisodium citrate as additives. The morphology and luminescence properties of SrMoO4 samples were studied.The reaction temperature, time, and pH value have great effect on the morphology of materials. XRD results show that the SrMoO4 samples were tetragonal phase structure. SEM images show that the sample is composed of uniform and well-dispersed spherical particles.In addition, this method can provide reference for other molybdate materials.A series of GdVO4:xDy3+ and GdVO4:0.25% Dy3+,xEu3+ luminescent materials with different doping concentrations have been synthesized by sol-gel method. XRD results show that the samples exhibit good crystallinity. By tuning the doping amount of rare earth ions, the emission color can be tuned from cold white light to warm white color, and pure white lightemission can be obtained with CIE coordinate(0.34, 0.33). The as-synthesized phosphors are expected to be applied in fields of lightening and display systems.