| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Powder Materials Processing and Fundamental Understanding
|
| Presentation Title |
Eu-doped Ca<sub>4-<i>x</i>-<i>y</i></sub>(Sr,Ba)<sub><i>x</i></sub>Eu<sub><i>y</i></sub>LaO(BO<sub>3</sub>)<sub>3</sub> Compounds for Efficient White-light Illumination |
| Author(s) |
Senam Tamakloe, Mahdi Amachraa, Jakoah Brgoch, Shyue Ping Ong, Olivia A. Graeve |
| On-Site Speaker (Planned) |
Senam Tamakloe |
| Abstract Scope |
White light-emitting diodes produce high luminous brightness with low energy consumption. However, their low correlated color temperature and low color rendering index limit their white light quality caused by a deficiency in the red-light component. In this study, we report on the synthesis and photoluminescent properties of a red-emitting oxyborate phosphor Ca<sub>4-<i>x</i>-<i>y</i></sub>(Sr,Ba)<sub><i>x</i></sub>Eu<sub><i>y</i></sub>LaO(BO<sub>3</sub>)<sub>3</sub> (M = Sr, Ba where x = 0, 0.5, … 4; y = 0.05) for solid-state white-lighting applications. The powders were made by solution combustion synthesis with subsequent calcination steps. For our work, the red-shifted emissions were detected in the orange-red regions (580 to 720 nm) using a fluorescence spectrophotometer. The Sr/Ba substitution at Ca sites in the Ca<sub>4</sub>Eu<sub>0.05</sub>LaO(BO<sub>3</sub>)<sub>3</sub> lattice can enhance the photoluminescence response and quality of the phosphor by increasing internal quantum efficiency. In general, our results indicate that our oxyborate phosphor can help produce warmer white light and improve white-light technologies. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Ceramics, Electronic Materials, Powder Materials |