SYNTHESIS OF YVO4: EU NANOPARTICLES IN SALT MELTS AND THEIR LUMINESCENT PROPERTIES
Nanoparticles of yttrium vanadate have been prepared by decomposition of citrate gel into inert salt melts. Crystallinity, morphology and luminescent properties have been investigated. It has been found that salt melt is useful for obtaining nanoparticles of yttrium vanadate slow agglomerated than using the standard Pechini method. The size and morphology of nanoparticles both depend on temperature and duration of thermal treatment in salt melt. Nanoparicles are characterized by luminescent properties close to the ones for microparticles. The concentration dependence of the luminescence intensity has been investigated. Optimal europium content for (Y100-xEux)0.01VO4 has been found equal to x=8. Emission and excitation spectra of nanoparticles have been measured. The position of the most intensive luminescence bands has been determined.