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Fig. 1
(A) WLEDs; (B) its parameters; (C) illustration of triple-layer remote phosphor configuration; (D) the simulation of WLEDs; (E) the measured spectra of the yellow-emitting YAG:Ce3+ phosphor; (F) the measured spectra of the red-emitting CaMoO4:Eu3+ phosphor. WLEDs, white light-emitting diodes
Fig. 2
Color rendering index of triple-layer remote phosphor structure as a function of red-emitting CaMoO4:Eu3+ and green-emitting CaAl2O4:Mn2+ phosphors
Fig. 3
CQS of triple-layer remote phosphor structure as a function of red-emitting CaMoO4:Eu3+ and green-emitting CaAl2O4:Mn2+ phosphors. CQS, color quality scale
Fig. 4
Lumen output of triple-layer remote phosphor structure as a function of red-emitting CaMoO4:Eu3+ and green-emitting CaAl2O4:Mn2+ phosphors
Fig. 5
The emission spectra of WLEDs under varying conditions of the triple-layer structure. WLEDs, white light-emitting diodes
Composition of red-emitting CaMoO4:Eu3+ phosphor
Ingredient
Mole (%)
By weight (g)
CaCO3
90
90
Eu2O3
5 (of Eu)
8.8
NaHCO3
5
4.2
MoO3
105
151
Composition of yellow-green-emitting CaAl2O4:Mn2+ phosphor