An investigation on luminescence and energy transfer of Ce3+ and Tb3+ in Ca3Y2Si3O12 phosphors

B. Vengala Rao, Yung Tang Nien, Weng Sing Hwang, In Gann Chen

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The present investigation aims to demonstrate the potentiality of Ca 3 Y2Si3O12 doped with Ce 3+ and Tb3+ along with Tb3+ and Ce3+ co-doped phosphors, which are prepared by a sol-gel method. Photoluminescence (PL) spectra revealed a brighter and broader violet-blue emission from the Ce3+ [5d (2D) → 2F5/2,7/2] and an intense sharp green emission (545 nm) from the Tb3+ ( 5D47F5) doped phosphors. For Tb3+ and Ce3+ co-doped phosphors, a strong green emission (5D47F5) was observed upon excitation with a UV wavelength (242 nm). An energy transfer phenomenon from Ce3+ to Tb3+ was observed in these co-doped nanocrystalline phosphors. It was also observed that their PL intensity depends on the doping concentration of Ce3+, while the concentration of Tb3+ is fixed. The mechanism involved in the energy transfer between Ce3+ and Tb3+ was explained with an energy level diagram. For these phosphors, X-ray diffraction and transmission electron microscopy were carried out to understand their structural properties.

Original languageEnglish
Pages (from-to)J338-J341
JournalJournal of the Electrochemical Society
Issue number11
Publication statusPublished - 2009 Oct 13

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

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