Structural and Luminescent Characteristics of Divalent Europium Activated Barium Aluminate with the Tridymite Structure Synthesized by the Sol-Gel Technique

Abstract

Abstract: In this study, alkaline earth aluminates were investigated as potential hosts for new blue luminescent materials with nanoparticles. Ba_1-xEu_xAl₂O₄ with the stuffed tridymite hexagonal structure was successfully synthesized at 900 °C under controlled sol-gel conditions. Divalent europium was effectively used to activate this host material, producing a brilliant blue-emitting phosphor. Its spectral photoluminescence at 408 nm appears to be in a region close to the laser blue region, with chromaticity coordinate values suitable for the standard blue of the PAL TV system.