Abstract
Ca15(PO4)2(SiO4) 6:Eu2+,Ce3+ phosphor was synthesized by a solid-state reaction. Doping of Ce3+ into the Ca2+ site of the Ca15(PO4)2(SiO4) 6:Eu2+ phosphor enhanced the Eu2+ emission greatly, as observed by measuring the photoluminescence properties and the quantum efficiency levels. The mechanism of the enhancement of the Eu 2+ emission by Ce3+ doping was investigated by comparing the normalized photoluminescence (PL) spectra with the normalized photoluminescence excitation (PLE) spectra and analyzing the absorbance and the fluorescence lifetime of the Ca15(PO4) 2(SiO4)6:Eu2+,Ce3+ phosphors. Furthermore, the thermoluminescence properties were measured to confirm the thermal stability of the synthesized phosphor when exposed to the high junction temperature of recent high-power LED chips, showing a thermal activation energy barrier of 0.213 eV.
Original language | English |
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Pages (from-to) | 9791-9795 |
Number of pages | 5 |
Journal | Ceramics International |
Volume | 39 |
Issue number | 8 |
DOIs | |
Publication status | Published - 2013 Dec |
Externally published | Yes |
Keywords
- A. Powders: solid state reaction
- C. Optical properties
- D. Silicate
- E. Functional applications
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Process Chemistry and Technology
- Surfaces, Coatings and Films
- Materials Chemistry