Spherical particles of rare-earth doped LaF3are synthesized through refluxing in glycerol/water media. The low-voltage cathodoluminescence of LaF3:Eu due to5D0→7F1and5D0→7F2transitions was found to be sensitive to the site that Eu3+ ions occupied. The luminous efficiency of LaF3: Ce3+, Tb3+with green emission is improved from 1.53 to 2.02 lm/W compared with LaF3: Tb3+, due to the energy transfer processes from Ce3+to Tb3+ions. Our results suggest that the obtained spherical particles of rare-earth doped LaF3are promising as highly efficient low-voltage cathodoluminescent phosphors, which have received considerably less attention.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)