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+ ( 5D4 →7F5) doped phosphors. For Tb3+ and Ce3+ co-doped phosphors, a strong green emission (5D4→7F5) 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.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Renewable Energy, Sustainability and the Environment
- Surfaces, Coatings and Films
- Materials Chemistry