Observation of green emission from Ce3-doped gadolinium oxide nanoparticles

Boon Kuan Woo, Alan G. Joly, Wei Chen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


Green emission at around 500 nm is observed in Gd2O 3:Ce3 nanoparticles and the intensity is highly dependent on the concentration of Ce3 in the nanoparticles. The luminescence of this emission displays both picosecond (ps) and millisecond (ms) lifetimes. The ms lifetime is over four orders of magnitude longer than typical luminescence lifetimes (1040 ns) of Ce3 in traditional Ce3 doped phosphors and therefore likely originates from defect states. The picosecond lifetime is shorter than the typical Ce3 value and is also likely due to defect or surface states. When the samples are annealed at 700 °C, this emission disappears possibly due to changes in the defect moieties or concentration. In addition, a blue emission at around 430 nm is observed in freshly prepared Gd2O3 undoped nanoparticles, which is attributed to the stabilizer, polyethylene glycol biscarboxymethyl ether. On aging, the undoped particles show similar emission to the doped particles with similar luminescence lifetimes. When Eu3 ions are co-doped in Gd 2O3:Ce nanoparticles, both the green emission and the emission at 612 nm from Eu3 are observed.

Original languageEnglish
Pages (from-to)49-53
Number of pages5
JournalJournal of Luminescence
Issue number1
Publication statusPublished - Jan 2011
Externally publishedYes


  • Defects
  • GdO:Ce
  • Green emission
  • Luminescence
  • Nanoparticles


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