Effect of Alumina Nanocoating on Thermal Stability of Y3Al5O12: Ce Phosphor

Abstract

Al₂O₃ film was successfully coated on the surface of YAG: Ce phosphor. The microscopic structure and thermal stability of Al₂O₃-coated phosphor were investigated. The results show that a smooth and uniform alumina nanocoating was formed on the surface of YAG: Ce phosphor particles, which revealed the formation of YAG: Ce-Al₂O₃ core-shell structure. The optical properties of Al₂O₃coated phosphor have shown that the luminescent intensity of Al₂O₃-coated YAG: Ce phosphor decreases slightly. But the thermal stability became better and the resistant light decay has been improved ca. 20 %.