Synthesis and luminescence characteristics of Mg2Al4Si5O18:Eu2+ and nitrided Mg2Al4Si5O18:Eu2+ phosphors

Mg 2 Al 4 Si 5 O 18 :Eu 2+ and nitrided Mg 2 Al 4 Si 5 O 18 :Eu 2+ phosphors were synthesized through a high temperature sintering process. The luminescence characteristics of Mg 2 Al 4 Si 5 O 18 :Eu 2+ phosphors and influence of nitridation on their luminescence characteristics were investigated. The XRD results demonstrate that the Eu 2+ or N 3− doping does not change the phase of Mg 2 Al 4 Si 5 O 18 host. Under excitation at 365 nm, Mg 2 Al 4 Si 5 O 18 :Eu 2+ phosphors exhibit emission band locating at blue light region. The introduction of N 3− results in the reduction of Eu 2+ emission intensity and redshift of Eu 2+ emission spectrum. Meanwhile, the introduced N 3− enhances the thermal stability and prolongs lifetime of Mg 2 Al 4 Si 5 O 18 :Eu 2+ phosphors. On the basis of luminescence characteristics of Mg 2 Al 4 Si 5 O 18 :Eu 2+ and nitrided Mg 2 Al 4 Si 5 O 18 :Eu 2+ , the influence of introduced N 3− on luminescence was confirmed. • Synthesis of Mg 2 Al 4 Si 5 O 18 :Eu 2+ and nitrided Mg 2 Al 4 Si 5 O 18 :Eu 2+ phosphors. • Red shift of Eu 2+ emission band induced by introduction of N 3- . • Enhanced thermal stability of Mg 2 Al 4 Si 5 O 18 :Eu 2+ by introduction of N 3- .