Green and red luminescence in Tb3+ and Eu3+:Zn2SiO4 powders

S. Buddhudu*, H. X. Zhang, C. H. Kam, S. L. Ng, B. S. Ooi, Y. L. Lam, Y. C. Chan, Y. Zhou, W. X. Que, K. S. Wong

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review


We report the preparation and photoluminescence spectral analysis of Tb3+ and Eu3+ doped Zn2SiO4 powders in sol-gel sol-gel process. On exposure to an UV source, these rare earth ions doped zinc silicate materials have shown prominent luminescent green and red colors, due to the electronic transitions of 5D47F5 (Tb3+) and 5D07F2 (Eu3+) respectively. The green emitting transition of Tb3+ material has been a magnetic dipole in nature and the red emitting transition of Eu3+ material has been due to an electric dipole in nature with a hypersensivity in its luminescence. Systematic characterization has been carried out to understand the fluorescence efficiency of these two materials by measuring their excitation, photoluminescence, time-resolved luminescence spectra and lifetimes of the emission transitions (5D07F0,1,2,3,4&5) of Eu3+ at two different excitation wavelengths of 226 nm and 395 nm. However, for the emission transitions (5D47F6,5,4,3,2&1) of Tb3+ doped material, one excitation wavelength of 229 nm was used. Structural characterization of these materials was carried out with an XRD and TEM measurements. The computed color coordinates suggest that both the phosphors have all desirable features for CRT screen applications.

Original languageEnglish (US)
Pages (from-to)68-74
Number of pages7
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 2000
Externally publishedYes
EventRare-Earth-Doped Materials and Devices IV - San Jose, CA, USA
Duration: Jan 26 2000Jan 27 2000

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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