Synthesis and photoluminescence of Eu~(2+)-Mg~(2+) co-doped γ-AlON phosphors

摘要

Eu~(2+) -Mg~(2+) co-doped AlON phosphors were prepared by a solid-state reaction route. Their structure and photoluminescence properties were studied. The substitution of Al by Mg favored the formation of pure spinel-type AlON phase and the incorporation of Eu into AlON crystal lattice. Second phase appeared in Eu containing powders. Under ultraviolet excitation at 310 nm, 3% Eu~(2+)-10% Mg~(2+) co-doped phosphors exhibited a strong broad emission band in the wavelength range of 430-620 nm with a maximum at about 490 nm assigned to the typical 4f~65d~1-4f~7 transition of the Eu~(2+) ion. Red shift of the emission peak is observed as the increase of Eu~(2+) concentration due to interaction between Eu~(2+) ions.