Spectroscopic studies of noble metal incorporated lanthanide vanadates and YF 3:Tb 3+ nanoclusters encapsulated in hybrid hydrogels

摘要

AbstractExtensive analysis of europium doped yttrium vanadate (YVO4: Eu3+) and terbium doped yttrium fluoride (YF3:Tb3+) has been evaluated by means of powder X-ray diffractions, scanning electron microscope and luminescence spectroscopy techniques. The results demonstrate noticeable difference in emission spectra for the sample of YVO4: Eu3+in the presence of Gd3+. As for the influence of the nanocrystal surface, the incorporation of silver content will also affect the intensity of the europium(III) luminescence. In addition, a hydrolytic sol-gel approach and a soft support matter (polyacrylic acid) were employed for the fabrication of YF3:Tb3+activated hydrogel. The emission spectra gave rise to the intensive green emissions centered at 545?nm due to5D4→7F5transition of Tb3+. Temperature elevation experiments were performed and could partially recover the green emissions.Highlights?Silver content will decide the europium(III) luminescence.?Soft material was employed for the gel host.?Temperature increase will enhance green emissions.]]>