Electron–vibrational interaction in 5d state of Ce3+ ion in (LiMg/Li2Na/Li3)BF6 phosphors

Yellow-green luminescence and extreme thermal quenching in the Sr6M2Al4O15:Eu2+ (M = Y, Lu, Sc) phosphor series

“…This parameter is related to the offset, ΔR, of the equilibrium position of the excited state potential energy surface following = ½ ω ΔR2, where M is the reduced mass of the system. [40] In a strongly coupled (large ΔR) system S > 5, intermediate coupling tends to fall in the range 1 < S < 5, and weak coupling (small ΔR) is when S<1. Using the previous description of the relationship between ΔR and the thermal quenching temperature it follows that the most thermally robust system should arise in weakly coupled system.…”

Analysis of electron–vibrational interaction in interconfigurational 5d➔4f transition of Eu2+ ions in Na5Ca4(PO4)4F

“…The validity of the results is checked by modeling the emission band shape and comparing it with the experimental curve. EVI studies have been carried out for many materials in the past (14)(15)(16)(17)(18)(19).…”

Synthesis and characterization of novel Na15(SO4)5F4Cl:Ce3+halosulfate phosphors

“…Ce 3+ exhibits host‐dependent 4f–5d absorption and 5d–4f emission due to the strong interaction between its 5d states and the crystal lattice. The ground 4f 1 electronic configuration of Ce 3+ is split by a spin–orbit interaction into two sublevels, 2 F 5/2 and 2 F 7/2 , with an energy interval of ~ 2000 cm −1 . The 4f–5d transitions are electric‐dipole‐allowed transitions and, because there is only one single electron in the 5d configuration, repulsion between 5d electrons is absent .…”