Luminescence Performance of Mn⁴⁺ Activated BaLa₂Al₂O₇ Phosphors

Abstract

Mn4+-doped BaLa2Al2O7 phosphors were developed after a sintering process at 1400ºC for 3 h. The phase and luminescence performance of them were researched. X-ray diffraction patterns confirm single phase of the Mn4+-doped BaLa2Al2O7 phosphors. Upon UV light excitation, the Mn4+-doped BaLa2Al2O7 phosphors emit strong deep-red emission. The concentration-dependence emission spectra demonstrate the critical concentration for Mn4+ ion in BaLa2Al2O7 host is 0.006. On the basis of the temperature-dependence emission spectra, the activation energy for Mn4+ has been calculated as 0.292 eV, which suggests excellent thermostability of the Mn4+-activated BaLa2Al2O7 phosphors.