Tang, JinkeZhou, WenliYang, JieWang, JingLi, YeKuang, XiaojunLiang, Hongbin2024-02-122024-02-122012-07-02https://wyoscholar.uwyo.edu/handle/internal/6201https://doi.org/10.15786/wyoscholar/9629The effects of the 5d energy locations of Ce3+ centers on the NIR quantum cutting process were studied in Y2SiO5 with two different substitutional Y3+ lattice sites for Ce3+ and Yb3+. Powder XRD and Rietveld refinement were used to characterize phase purity, crystal structure, lattice parameters and occupation fractions of Y2-x-yCexYbySiO5 (x = 0.002 and 0.3, y = 0-0.2). PLE and PL spectra show that both kinds of Ce3+ centers in Y2-xy CexYbySiO5 can cooperatively transfer energy to Yb3+-Yb3+ ions pair. The dependence of the integrated emission intensities of Ce3+ and Yb3+, decay lifetime (τ) of Ce3+, nonradiative energy transfer rate (KCe→Yb), cooperative energy transfer efficiency (ηCET) and quantum efficiency (ηQE) on the concentration of Yb3+ ions were studied in details. More importantly, these results demonstrate that the 5d energy locations of Ce3+ ions have a great influence on NIR quantum cutting process in Ce3+-Yb3+ system: the closer they are to twice the absorption energy (~20000 cm−1) of Yb3+, the higher the cooperative energy transfer efficiency from the lowest 5d excited state of Ce3+ to the Yb3+ Yb3+ ions pair.enghttps://creativecommons.org/licenses/by/4.0/Physical Sciences and Mathematicsjournal contribution10.1364/OE.20.00A510