Preparation and photoluminescence properties of novel orange-red La3Ga5SiO14:Sm3+ phosphors

Red-emitting Cs2NaScCl6:Sm flexible films for high-resolution X-ray imaging

“…When doped with Sm 3+ , three characteristic orange-red peaks around 550–700 nm are observed, corresponding to the 4G 5/2 → 6H 5/2 (566 nm), 4G 5/2 → 6H 7/2 (604 nm), and 4G 5/2 → 6H 9/2 (652 nm) energy level transitions of Sm 3+ , which are presented as the Sm 3+ ion of 4f–4f characteristic luminescence. 26 With increasing Sm 3+ doping concentration, the X-ray luminescence intensity of the intrinsic Cs 2 NaScCl 6 host peak gradually decreases. Meanwhile, the X-ray luminescence intensity of the characteristic Sm 3+ peaks increases gradually with increasing doping concentrations, reaching a maximum of 7% Sm 3+ doping.…”

Efficient and zero thermal quenching Sm3+-activated Li2LaTiTaO7 phosphor for white LEDs

“…The biexponential curves are due to the electron relaxation in the luminescence process of agglomerated materials although there is only one emission center, which is similar to other reported Sm 3+ -doped phosphors, such as Ca 2 LaNbO 6 :Sm 3+ , La 3 Ga 5 SiO 14 :Sm 3+ , Ca 5 (PO 4 ) 2 SiO 4 :Sm 3+ , and Ba 3 Lu(PO 4 ) 3 :Sm 3+ phosphors. 27,41–43 The decay lifetime decreases with the increasing Sm 3+ concentration due to the effect of non-radiative transition (shown in Fig. 6(b)).…”