Emission enhancement of Sr3YP3O12:R (R = Dy3+ and Eu3+) phosphors for light-emitting diodes by adding H3BO3 flux

CaAl2Si2O8:Dy3+, Eu3+: synthesis, luminescence properties, energy transfer, and tunable emission

“…PLE peaks lie at ∼298, 324, 336, 350, 365, 385, 425, 455, and 475 nm owing to the 6 H 15/2 → 4 K 11/2 , 6 H 15/2 → 6 P 3/2 , 4 M 17/2 , 6 H 15/2 → 4 I 9/2 , 6 H 15/2 → 6 P 7/2 , 6 H 15/2 → 4 I 11/2 , 6 P 5/2 , 6 H 15/2 → 4 I 13/2 , 4 F 7/2 , 6 H 15/2 → 4 G 11/2 , 6 H 15/2 → 4 I 15/2 , and 6 H 15/2 → 4 F 9/2 transitions of Dy 3+ ions, respectively. 42,43 With the excitation at 350 nm, CaAl 2 Si 2 O 8 :6 mol%Dy 3+ showed yellow emission with chromaticity coordinates (0.4616, 0.5366) (see Fig. 3).…”

“…The excitation and emission spectra of CaAl 2 Si 2 O 8 :6 mol%Dy 3+ at 300 K (l em = 575 nm and l ex = 350 nm) are displayed in Fig. 3 42,43 With the excitation at 350 nm, CaAl 2 Si 2 O 8 :6 mol%Dy 3+ showed yellow emission with chromaticity coordinates (0.4616, 0.5366) (see Fig. 3).…”