Preparation of Eu³⁺ doped Y₂O₃ and core-shell Y₂O₃:Eu-Y₂O₃ nanoparticles: Photoluminescence study

Abstract

<smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="PlaceType" downloadurl="http://www.5iantlavalamp.com/"><smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="PlaceName" downloadurl="http://www.5iantlavalamp.com/"><smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="place" downloadurl="http://www.5iantlavalamp.com/"> Nanocrystalline of Y₂O₃ doped with Eu³⁺ at different concentrations and also core-shell of Y₂O₃ is prepared by wet chemical method using urea hydrolysis at low temperatures. XRD, TEM and FTIR are used to characterize the prepared nanoparticles. The sizes determined by XRD are well in agreement with TEM results. As-prepared samples show luminescence peak of Eu³⁺ transition ⁵D₀ → ⁷F₂ at 615 nm but annealed samples at 610 nm. Core-shell study of the nanoparticles show reduction in the luminescence intensity compared to the core particles. </smarttagtype></smarttagtype></smarttagtype>