Radioluminescence of SrAl2O4:Ln3+ (Ln = Eu, Sm, Dy) phosphor ceramic

Phosphors for radiation detection require efficient energy transfer from the ionization track to the luminescent centers. In this work, the radioluminescence (RL) spectra of SrAl2O4 phosphor ceramics doped with individual trivalent rare earth element (REE) ions (Sm, Eu and Dy) are reported at the room temperature. Although there is some intrinsic UV/blue emission from the host lattice, the dominant signals are from the rare-earth sites, with signals characteristic of the REE2+ and REE3+ states. The shapes of the emission bands are different for each dopant. The sharp emission properties show that the SrAl2O4 is a suitable host for rare-earth ion doped phosphor material.

► Radioluminescence spectra of SrAl2O4 phosphors.
► Different emission bands for each rare earth dopant.
► SrAl2O4 is suitable host for rare-earth ion doped phosphor material.
► RL could potentially alter some of the components of the defect complexes.