Facile Synthesis of Highly Efficient and Thermally Stable BaAl4Sb2O12:Eu2+ Phosphor in Air

Despite many Eu2+-doped phosphors having been synthesized by different methods, a simple synthetic strategy for Eu2+-doped high-performance phosphors remains one of the significant challenges for phosphor-conversion white light-emitting diodes. Herein, a novel broad-band excitation yellow phosphor Ba0.985Al4Sb2O12:0.015Eu(2+) (BASO:Eu2+) with high thermal stability (423 K, 94%) and internal quantum efficiency (96.7%) are reported. More importantly, the novel phosphor is synthesized by solid-state reaction at high temperatures in air. Structural and spectral analyses show that the Eu2+ ions in BASO preferably occupy [BaO8] hexahedra, forming a single luminescence center. This study provides a reliable direction for the facile synthesis of high-performance Eu2+-doped phosphors in air.

Automated summary

A novel broad-band excitation yellow phosphor Ba0.985Al4Sb2O12:0.015Eu(2+) (BASO:Eu2+) with high thermal stability (423 K, 94%) and internal quantum efficiency (96.7%) was synthesized by solid-state reaction at high temperatures in air. Structural and spectral analyses revealed that the Eu2+ ions in BASO occupied [BaO8] hexahedra, forming a single luminescence center. This study provides a reliable direction for the facile synthesis of high-performance Eu2+-doped phosphors in air.