Luminescence Spectra of SrAl₁₂O₁₉:Pr³⁺, Mn²⁺ under VUV--UV Excitation

Luminescence spectra of SrAl₁₂O₁₉:Pr³⁺,Mn²⁺ under VUV--UV excitation are investigated. The characteristic emissions between 4f levels and the excitation of 5d for Pr³⁺ are observed. The emission of Mn²⁺ peaks at 517nm and the excitations due to the ground to multiplets are observed at 276, 360, 386 and 426nm. However, the spectral overlap between the emission of Pr³⁺ and excitation of Mn²⁺ is absent, suggesting that the quantum splitting cannot be achieved via a Pr³⁺--Mn²⁺ ion pair in the host SrAl₁₂O₁₉.