Speaker
Description
In this work, the Li3Ba2La3(MoO4)8:(Eu3+, Tb3+) phosphor was investigated due to its excellent luminescence emission properties in the red spectral range (615~620 nm) under excitation with a blue LED (Light Emitting Diode). The phosphors were synthesized by the combustion and sol gel methods, at different Eu and Tb concentrations, in order to find the optimal luminescence conditions and nanostructural characteristics. Its physicochemical properties were studied by different analysis techniques. Subsequently, the optimized red material was mixed with a commercial YAG:Ce3+ phosphor at different concentrations to obtain white light. Then, a white light lamp was manufactured using a commercial blue LED as the excitation source for the combined luminescent powders. Finally, the emission spectra and the Color Rendering Index (CRI) of the lamp were reported. The proposed phosphor is a promising candidate for its application as a red-emitting component in lighting systems based on solid-state devices, particularly blue LEDs.
This work was supported by
DGAPA-UNAM and CONACyT
Reference
- Böhnisch, D., Baur, F., and Jüstel, T. (2017). "Photoluminescence and energy transfer behavior of narrow band red light emitting Li3Ba2Tb3(MoO4)8:Eu3+". Dalton Transactions, 47(5), 1520–1529.
| Keywords | europium, terbium, energy transfer, LED |
|---|---|
| Author approval | I confirm |
| Author will attend | I confirm |
