Synthesis and luminescence behavior of Eu3+-doped CaF2 nanoparticles

摘要

Luminescent Ca1-xF2+x:Eu-x nanoparticles were synthesized by a chemical co-precipitation method in an ethanol solution. The Ca1-xF2+x:Eu-x nanoparticles exhibit a sphere-like morphology with particle diameter of about 15-20 nm. With increasing concentration of Eu3+ ion the intensity of XRD diffraction peaks decreased significantly and full width at half-maximum of the peaks increased gradually, which indicated that more Eu3+ ions resulted in the increase of structural defects. The emission spectrum of Ca1-xF2+x:Eu-x nanoparticles consisted of a few narrow, sharp lines corresponding to Eu3+ ions. The luminescence intensity of Ca1-xF2+x:Eu-x nanoparticles increased with increasing concentration of Eu3+ ion and reached a maximum at approximately 15 mol%. (c) 2005 Elsevier Ltd. All rights reserved.