Epitaxial growth, photoluminescence and scintillation properties of Gd(3+) co-doped YAlO(3):Ce(3+) films
2019
Abstrakt
In this study, the Gd(3+)-substituted yttrium aluminum perovskite epitaxial films activated by Ce(3+) ions, (YGd)AlO(3):Ce(3+) with Gd content 0-44%, were prepared by liquid phase epitaxy technique and their optical, luminescence, and scintillation properties were studied. The results showed that films with Gd content below 20% had greater photoluminescence and radioluminescence intensities.
For higher Gd concentrations, the Ce(3+) emission gradually decreased and the Ce(3+) decays were accelerated. The model of bidirectional non-radiative energy transfer between Gd(3+) and Ce(3+) ions and energy migration over the Gd(3+) sublattice is suggested and the processes responsible for the observed effects are discussed.