Synthesis of nanocrystalline YVO4:Eu red emission phosphor with high fluorescence intensity by hydrothermal method using original vanadium–peroxo-citrate complex
نویسندگان
چکیده
Vanadium peroxo-citrate complex was used for the first time for synthesis of YVO4:Eu red emission phosphor material by hydrothermal method. It was found that particles size can be efficiently controlled in the range of 60–400 nm by changing concentration of the solution utilized for the hydrothermal process. The nanocrystalline powders of YVO4:Eu prepared at 200°C for 2 h with post-synthesis heat treatment at 1000°C exhibited high fluorescence intensity comparable or better than one of the best commercially available YVO4:Eu phosphor synthesized by conventional solid state reaction method and having much larger grain size. ©2009 The Ceramic Society of Japan. All rights reserved.
منابع مشابه
Controlled Hydrothermal Synthesis and Photoluminescence of Nanocrystalline ZnGa2O4:Cr3+ Monospheres
The hydrothermal synthesis of nanocrystalline ZnGa2O4:Cr3+ (ZGC) red phosphor monospheres was accomplished in this work, and the effects of system pH, reactant content, reaction time, and citrate anions (Cit3-) on the phase and morphology evolution of the product were systematically studied. Under the optimized conditions of Cit3-/M = 1.0 molar ratio (M = total cations), pH = 5.0, and 0.2 mmol ...
متن کاملSynthesis and luminescence properties of YVO4:Eu ,Bi phosphor with enhanced photoluminescence by Bi doping
YVO4:Eu ,Bi phosphors have been prepared by the high-temperature solid-state (HT) method and the Pechini-type sol–gel (SG) method. Spherical SiO2 particles have been further coated with YVO4:Eu ,Bi phosphor layers by the Pechini-type SG process, and it leads to the formation of core–shell structured SiO2/YVO4:Eu ,Bi phosphors. Therefore, the phase formations, structures, morphologies, and photo...
متن کاملPhotoluminescence characteristics of Bi-sensitized YVO4:Eu phosphor
A possibility of YVO4:Eu phosphor as a red phosphor for the application to ultraviolet (UV) light emitting diodes (LEDs) was investigated. Bi was used as a sensitizer for Eu to improve photoluminescence (PL) intensity in the longer wavelengths region than 350 nm and Bi-sensitized YVO4:Eu phosphor was characterized in terms of crystal structure, and PL excitation/emission spectra. Addition of Bi...
متن کاملHydrothermal synthesis and characterization of YVO 4 - based phosphors doped with Eu 3 + ion
Nanocrystalline yttrium orthovanadate (YVO4): Eu powders with different morphologies were synthesized in basic media by surfactant-assisted hydrothermal process. The structures and optical properties of products were investigated using the X-ray powder diffraction, transmission electron microscopy, and photoluminescence spectroscopy. Results showed that pH value played a key role in the formati...
متن کاملLigand-functionalization of BPEI-coated YVO4:Bi3+,Eu3+ nanophosphors for tumor-cell-targeted imaging applications.
In this study, surface-functionalized, branched polyethylenimine (BPEI)-modified YVO4:Bi(3+),Eu(3+) nanocrystals (NCs) were successfully synthesized by a simple, rapid, solvent-free hydrothermal method. The BPEI-coated YVO4:Bi(3+),Eu(3+) NCs with high crystallinity show broad-band excitation in the λ=250 to 400 nm near-ultraviolet (NUV) region and exhibit a sharp-line emission band centered at ...
متن کامل