Photoconversion from yellow-to-green in vanadium doped zinc silicate nanophosphor material

Abstract

We report a novel synthesis process of V doped β-Zn2SiO4 green nanophosphors based on sol–gel method. After the incorporation of ZnO:V nanoparticles in a silica monolith using a sol–gel method with supercritical drying of ethyl alcohol in two steps, it is heated in air at 1500°C for 2h. X-ray diffraction (XRD) and transmission electron microscopy (TEM) are used to characterize the phase purity, particle size and morphology. In addition, photoluminescence (PL) is used for optical studies. XRD results indicate that pure phase of β-Zn2SiO4 with triclinic structure was obtained after thermal treatment at 1500°C. The PL shows an new intensive luminescence band in the visible range centered at about 526nm, attributed to vanadium in the interfaces between the Zn2SiO4 nanoparticles and the SiO2 host matrix.