Insight into the optical absorption and luminescent properties due to the presence of Pr4+ in Pr-doped Y2O3

Revisiting the Charge Transfer State in Tetravalent Lanthanide Doped Oxides: Up to Date Phenomenological Description

“…Surprisingly, no other significant efforts in order to get additional insight into these experimental observations have been presented since then, until recently in a research work carried out by our group. 9 Nowadays, with the advent of more robust phenomenological models, formulated in the past two decades, [10][11][12][13] have finally provided a framework allowing to revisit this issue. Next, it is briefly described the rationalization of the prototypical ligand-tometal charge transfer (LMCT) state O 2−/− → Eu 3+/2+ in Eu-doped oxides under this phenomenological approach.…”