Luminescent properties of Eu2+-activated SrLaGa3S6O phosphor

Photoluminescence properties of a new Eu2+-activated CaLaGa3S7 yellowish-green phosphor for white LED applications

“…Consequently, the absorption of the 4f-5d transitions may extend to the visible region of the spectrum (400-500 nm). In this regard, blue-emitting BaAl 2 S 4 :Eu 2 þ [13], green-emitting SrGa 2 SeS 3 :Eu 2 þ [14] or Ca 1À x Zn x Ga 2 S 4 :Eu 2 þ phosphors [15] as well as yellowish-orange-emitting Sr 8 CaLaGa 3 S 6 O:Ce 3 þ , Tb 3 þ phosphors were first reported by our group, see for example [20][21][22]. In these studies, a portion of oxygen in (Sr,Ca)LaGa 3 O 7 was replaced by sulfur.…”

Enhanced luminescent properties of Ca3−Tb ZrSi2O9+/2 phosphors by Al3+ doping into the Zr4+ site in the host lattice

“…Since the concentration quenching is caused by energy transfer from one activator to another until an energy sink in the lattice is reached, there should be a critical energy transfer distance between Tb 3 þ ions in Ca 3 À x Tb x Zr 1 À y Al y Si 2 O 9 þ (x-y)/2 that yields the highest emission intensity. The critical energy-transfer distance (R c ) in the Ca 3 À x Tb x Zr 1 À y Al y Si 2 O 9 þ (x-y)/2 phosphors, in which the Tb 3 þ ion is introduced solely into the Ca 2 þ ion sites in the present case, can be estimated approximately using the following equation [32,33]:…”

Down‐Shifting and Up‐Conversion Spectroscopic Properties of (Ca,Mg)3(VO4)2:Yb3+,Eu3+ Phosphors

“…. Nevertheless, the q–q interaction was found to be responsible for Gd 3+ → Eu 3+ energy transfer in Gd 2 SiO 5 by Mori et al ., Tb 3+ → Eu 3+ energy transfer in zinc silicate glasses by Liang et al ., Pr 3+ → Eu 3+ energy transfer in K 5 Li 2 GdF 10 by Solarz, Nd 3+ → Nd 3+ energy transfer in (1,2‐dimethoxyethane) 2 Nd(SC 6 F 5 ) 3 by Kumar et al ., Sm 3+ → Sm 3+ energy transfer in oxyfluoroborate glasses by Mahato et al ., Eu 2+ → Eu 2+ energy transfer in SrLaGa 3 S 6 O by Zhang et al ., Dy 3+ → Dy 3+ energy transfer in YPO 4 , CaMoO 4 , and oxyfluoroborate glasses by Faoro et al ., Cavalli et al . , and Mahato et al ., respectively, Eu 3+ → Eu 3+ energy transfer in sol–gel derived silica glasses treated at 600°C, calcium diborate glasses and Ca 10 Na(PO 4 ) 7 by Martín et al ., Lavín et al .…”