Luminescence Spectra of SrAl ₁₂ O ₁₉ :Pr ³⁺ , Mn ²⁺ under VUV–UV Excitation

Abstract

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 517 nm and the excitations due to the ground to multiplets are observed at 276, 360, 386 and 426 nm. 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.