Reduction of Eu3+ to Eu2+ in MAl2Si2O8 (M=Ca, Sr, Ba) in air condition

Dependence of Eu3+ luminescence dynamics on the structure of the combustion synthesized Sr5(PO4)3F host

“…A best fit with probability 2 ≈ 1.1 was obtained for decay time values of 1 = 1.5 and 2 = 3.9 ms which are consistent with the lifetime values reported in the literature [23]. The presence of larger 2 values suggests that two components are responsible for the decay time.…”

Synthesis of phosphorescent ceramic pigment BaAl1.7B0.3O4 doped with Eu2+ and Dy3+

“…The visual analysis indicated that samples with this formulation had the best luminescent properties and the highest emissions. Previous studies have reported that phosphor emission for this material is related to oxygen vacancies [16,18]. Specifically, BaAl 2 O 4 doped with Eu 2 þ causes no detectable decrease in O 2 À vacancies by H 2 (g), samples do not exhibit luminescence and the graph generated by Raman has an intensity line close to zero [19].…”

Luminescent Characteristics of Blue Phosphor CaAl2Si2O8:Eu2+in White LED Applications by Solid State Method

“…Much attention has been paid towards the luminescent properties of Eu 2+ ions activated compounds and the reduction processes of Eu 3+ to Eu 2+ in phosphor preparations. The Eu 2+ ion shows broad emission bands excited by ultraviolet (UV) light (320 -400 nm), arising from interconfigurational 4f 6 5d 1 (excitation state) -4f 7 (ground state) allowed transition [9][10]. This transition is strongly dependent on the crystal fields of the host lattices since 5d orbitals are more sensitive to the ligand field.…”