![]() ![]() It is also shown that surface loss processes are the reason of the degradation of energy transfer efficiency from the host lattice to Eu 3+ under high-energy excitations in vacuum ultraviolet spectral range. The resulted YVO4:Eu3+SiO2 core-shell phosphors were characterized by. and mesoporous coreshellstructured nanocomposites as drug carriers. The surface defects of YVO4: Eu<3+> nano-luminescent granule can be minimized so that the luminous efficiency is improved by 5 to 30 percent compared with the luminous efficiency of simple YVO4: Eu<3+> nano-powder. Fabrication, patterning, and optical properties of nanocrystalline YVO4 : A (A.YPO4 is the same with YVO4 in structure with close lattice parameters. Multi-layer core-shell nanoparticles (YVO4:Nd3+/mSiO2/SiO2) consisting of silica cores (SiO2), mesoporous silica (mSiO2) intermediate layers, and Neodymium. It is demonstrated that the Eu 3+ luminescence recovery is achieved at the expense of the suppression of the intrinsic emission but not due to the passivation of surface loss centers in core-shelled nanocrystals. The core/crust structure phosphor powder is achieved by coating YPO4 on the surface of YVO4: Eu<3+>.A YF 3 core-shell layer around YVO 4:Eu nanoparticles partially recovers the intensity of the Eu 3+ emission. The results show noticeable differences between bulk and nanocrystalline YVO 4:Eu in photoluminescence experimental data, which explains by influence of the nanocrystal surface. Nanocrystalline YVO 4:Eu samples – both as-prepared and YF 3 core-shelled – have been synthesized by means of a microwave-assisted synthesis in ionic liquids, which allows to obtain 10–12nm nanoparticles with high crystallinity. Characterizations by means of X-ray diffraction, transmission electron microscopy, and X-ray. Comparing the luminescence processes of YVO4:Eu and core-shell YVO4YF3 nanocrystals with bulk-YVO4:Eu Shirmane, L. They were readily formed by hydrothermal epitaxial growth of YPO4 onto YVO4:Eu3+nanocrystals because YPO4 and YVO4 have the same crystal structure and similar lattice parameters. #YVO4 YVO4 CORE SHELL PDF#Comparative analysis of bulk, non-coated and core-shelled nanocrystalline YVO 4:Eu was performed by means of time-resolved luminescence and VUV excitation luminescence spectroscopy techniques. Novel YVO4:Eu3+YPO4 core/shell heteronanostructures with enhanced photoluminescence (PL) are proposed in this paper. Request PDF On Jun 1, 2015, Dini Xie and others published Improved luminescence in YVO4:Eu3+YVO4 coreshell nanoparticles through surface-confined thermal diffusion of Eu3+ Find, read and. ![]()
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