Sol–gel synthesis and photoluminescent characteristics of -doped nanophosphors

Abstract: The sol–gel method using and was used to prepare -doped nanopowders with particle sizes ranging from 50 to 200nm. This preparation was followed by a calcination process at . The effects which the Eu/Gd composition ratio and calcination temperature had on the phosphor structure and its luminescent properties were then investigated. Phosphor structure was examined by X-ray diffraction, field emission scanning electron microscopy, and transmission electron microscopy. The results confirm that the material consists of particles exhibiting good crystallinity. Photoluminescence and cathodoluminescence measurements of the particles show red emission at the 612nm () wavelength. The optimal molar concentration for obtaining the highest PL intensity for was 7% of (calcinated at for 2h). [Copyright &y& Elsevier]