Speaker
Description
SrAl2O4:Eu2+ is a well-known phosphor due to its strong green emission. The intense green emission makes SrAl2O4:Eu2+ an extremely interesting material for a broad range of applications, including emergency and safety lighting, anti-counterfeiting labels, roadway markings, and phosphor-coated bricks. This study investigates Eu2+-doped SrAl2O4 phosphors synthesized via the solid-state reaction method and characterized using X-ray powder diffraction (XRPD), photoluminescence (PL), and UV–Vis spectroscopy. XRPD analysis confirmed the formation of monoclinic SrAl2O4 after annealing at 1600°C. Residual SrCO3 observed at lower temperatures indicates incomplete phase formation, emphasizing the importance of high-temperature annealing to achieve phase purity and enhanced crystallinity. The effect of Eu2+ doping revealed concentration-dependent structural modifications. UV–Vis spectroscopy supported these findings, showing characteristic Eu2+ (4f–5d) absorption bands. PL results demonstrated enhanced emission intensity for samples synthesized through a two-step calcination and annealing process in a reducing Ar–5%H2 atmosphere, ensuring effective reduction of Eu3+ to Eu2+. These results highlight the importance of controlled synthesis in optimizing luminescent properties.
| Apply for student award at which level: | MSc |
|---|---|
| Consent on use of personal information: Abstract Submission | Yes, I ACCEPT |