About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Glasses and Optical Materials: Challenges, Advances, and Applications
|
| Presentation Title |
A comparative study of europium doped materials for white light generation |
| Author(s) |
Yannik Noah Palmer-Tesema |
| On-Site Speaker (Planned) |
Yannik Noah Palmer-Tesema |
| Abstract Scope |
Now-a-days there is a great demand for LED bulbs which are replacing incandescent light bulbs. LED bulbs are compact, rugged, and free from pollution. Diodes emit a single wavelength. However, phosphor coated diodes generate white light on exposure to blue or violet light. Global research is ongoing to design phosphor coatings which emit high intensity in a broad spectral wavelength region. We are also investigating different phosphor materials to address this issue. We are investigating the suitability of europium doped crystals and glasses for this purpose.The glass samples were then polished with sandpapers of different grades. Detailed spectroscopy measurements were performed to characterize the materials. Emission was stimulated from the samples by exposing them to blue diode lasers. A compact spectrometer was used for fluorescence spectral measurements. Emission spectral data and lifetime measurements are used for spectroscopic assignments. From the emission spectral measurements, color coordinates and color temperature were derived. |