Site occupation engineering of activator in a green phosphor Sr8CaLu(PO4)7: Eu2+ with high quantum yield for solid state lighting

Tuning Eu2+ luminescence in Sr8CaLu (PO4)7via Na+-induced local structure engineering for violet-chip-excitable full-spectrum lighting

“…5a-d. Consistent with previous study, 42 Lu 3+ and P 5+ cations in SCLP are surrounded by six and four oxygen atoms to form LuO 6 and PO 6 tetrahedra, respectively, while Sr ions are located in different coordination environments to form SrO 9 , SrO 8 and SrO 6 polyhedra (Fig. 5a).…”

A novel bright cyan emitting phosphor of Eu2+activated Ba6BO3Cl9with robust thermal stability for full-spectrum WLED applications

“…It is generally found that there is a sizable energy difference (4.2 eV) between the 5d and 4f electron orbitals of Eu 2+ ions. 47,48 According to ESI Note 1, † the calculated optical bandgap for BBC is 5.98 eV based on the Kubelka-Munk absorption spectrum (Fig. 3b), which is sufficient to create the emitting levels of Eu 2+ .…”

Dazzling Ca2LuScAl2Si2O12:Ce3+ green-emitting garnet-type phosphors for blue-chip-pumped white light-emitting diodes: broad emission band, high quantum efficiency and excellent thermal stability

“…This excellent IQE value is higher than those of many other green phosphors, such as CaSr 2 Al 2 O 6 :Ce 3+ (IQE = 31%), 38 Ca 2 LaHf 2 GaAl 2 O 12 :Ce 3+ (IQE = 40.7%), 62 and Sr 8 CaLu(PO 4 ) 7 :Eu 2+ (IQE = 77%). 63…”

“…This excellent IQE value is higher than those of many other green phosphors, such as CaSr 2 Al 2 O 6 :Ce 3+ (IQE = 31%), 38 Ca 2 LaHf 2 GaAl 2 O 12 :Ce 3+ (IQE = 40.7%), 62 and Sr 8 -CaLu(PO 4 ) 7 :Eu 2+ (IQE = 77%). 63 The thermal stability of phosphors is another important parameter for evaluating LED phosphors. For this purpose, we have studied the luminous stability of the CLSAS:4% Ce 3+ phosphor at different testing temperatures.…”