Luminescence Performance of Mn4+ Activated BaLa2Al2O7 Phosphors

Mn 4+ doped BaLa 2 Al 2 O 7 phosphors were developed after a sintering process at 1400 °C for 3 h. The phase and luminescence performance of them were researched. The XRD patterns confirm single phase of the Mn 4+ doped BaLa 2 Al 2 O 7 phosphors. Upon the UV light excitation, the Mn 4+ doped BaLa 2 Al 2 O 7 phosphors emit strong deep-red emission. The concentration-dependence emission spectra demonstrate that the critical concentration for Mn 4+ ion in BaLa 2 Al 2 O 7 host is 0.006. On the basis of the temperature-dependence emission spectra, the activation energy for Mn 4+ has been calculated as 0.292 eV, which suggests excellent thermostability of the Mn 4+ activated BaLa 2 Al 2 O 7 phosphors.