Title
Thermally Stable Luminescence Properties And Energy Transfer Of Green-emitting LiBaPO4: Tb3+, Ce3+ Phosphor
Author
Hsuan-Lin Lai, Ru-Yuan Yang, Shoou-Jinn Chang
Year
2017
Journal
Ceramics International
Abstract
Green emitting LiBa1-x-yPO4:xTb3+,yCe3+ phosphors have been synthesized by solid state reaction method and investigated by means of microstructure, photoluminescence, and temperature dependence of luminescence property. Effective energy transfer occurs from Ce3+ to Tb3+ in LiBaPO4 host due to the observed spectral overlap between the emission band of Ce3+ and the excitation band of Tb3+.We have also shown that the energy transfer from Ce3+ and Tb3+ in LiBaPO4 host was demonstrated to be resonant type via a dipole-dipole interaction mechanism with the energy transfer critical distance of 0.9077 nm. Furthermore, LiBa0.75PO4:0.2Tb3+,0.05Ce3+ phosphor shows high thermally stable luminescence comparable to commercial phosphor YAG:Ce3+. All the characteristics suggest that LiBaPO4:Tb3+,Ce3+ is a good green phosphor candidate for creating white light in phosphor-conversion WLED.
Instrument
FP-6200
Keywords
Fluorescence, Photoluminescence, Thermal stability, Materials , Optical properties, LEDs