Systematic trends in electron-hole pair trapping efficiency of rare earth doped YBO3 under vacuum ultraviolet excitation

Host-to-activator energy transfer efficiencies in rare-earth doped YBO3 under vacuum ultraviolet excitation have been estimated using excitation and reflectance spectroscopy. From these data, relative electron-hole pair (e-h) trapping rate constants have been calculated for seven different lanthanide dopants. In addition, the energies of activator electronic states relative to YBO3 band states were estimated using published empirical methods. From this, we find a correlation between e-h trapping efficiency and the energy of activator electronic states relative to YBO3 conduction and valence band energies.