Luminescence enhancement of CaZnGe2O6:Tb3+ afterglow phosphors synthesized using ZnO nanopowders

Boon Kuan Woo, Zhiping Luo, Yang Li, Surinder P. Singh, Alan G. Joly, Marius Hossu, Zhongxin Liu, Wei Chen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


CaZnGe2O6:Tb3+ afterglow phosphors were prepared by solid state reaction using organic coated ZnO nanopowders and their photoluminescence, X-ray luminescence and afterglow properties were investigated. The CaZnGe2O6:Tb3+ samples emit a green luminescence at 548 nm attributed to the 5D4- 7F5 transition of Tb3+. It was observed that the replacement of bulk ZnO by ZnO nanopowder in the sample synthesis increases the luminescence intensity. By adjusting the mass ratio of bulk ZnO to nanopowder ZnO, the photoluminescence intensity, X-ray luminescence intensity, and afterglow efficiency are improved. The optimized sample made with a 0.71 ratio of nano ZnO to bulk ZnO has a factor of four enhancement in X-ray luminescence, photoluminescence and afterglow intensities in comparison with the sample made with 100% bulk ZnO.

Original languageEnglish
Pages (from-to)1283-1290
Number of pages8
JournalOptical Materials
Issue number8
Publication statusPublished - Jun 2011
Externally publishedYes


  • Afterglow
  • Enhancement
  • Photoluminescence
  • X-ray luminescence
  • Zno nanoparticles


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