Vacuum UV excitation of luminescent materials by synchrotron radiation—electronic structure

Abstract

Excitation spectra of rare earth ions doped into LaF 3 and YF 3 were recorded in the UV and VUV energy range using synchrotron radiation. For Eu 3+, Era 3+ and Dy 3+, f-d transitions as well as charge transfer bands were localized. Transitions involving electrons of the host such as the gap energy between the valence and conduction bands were measured.