Dy3+ emission in M5(PO4)3F (M = Ca, Ba) phosphor

Abstract

: Ultrafine M 5 (PO 4 ) 3 F:Dy 3+ (M = Ca, Ba) phosphors were prepared via combustion process using metal nitrates as precursors. The formation of crystalline phosphate was confirmed by X-ray diffraction pattern. The PL excitation spectra show the excitation peaks observed at 250 to 400 nm due to f → f transition of Dy 3+ ion, which are useful for solid-state lighting purpose (mercury free excitation). The PL emission of Dy 3+ ion by 348 nm excitation gave an emission at 489 nm (blue), 582 nm (yellow) and 675 nm (red). All the characteristics of BYR emissions like BGR indicate that Dy doped Ca 5 (PO 4 ) 3 F and Ba 5 (PO 4 ) 3 F phosphors are good candidates that can be applied in solid-state lighting phosphor (mercury free excited lamp phosphor) and white light LED.

Novel Yellow-Emitting Sr8MgLn(PO4)7:Eu2+ (Ln = Y, La) Phosphors for Applications in White LEDs with Excellent Color Rendering Index

“…The atomic percentage ratio of O concentration was slightly higher than the expected value, which was due to the environmental trace and combustible gases evolved during the reaction. 20 3.2. Photoluminescence Properties.…”

Eu2+ luminescence in SrCaP2O7 pyrophosphate phosphor

“…The decrease in emission intensity at 1 mol% concentration of europium ion occurs as a result of concentration quenching. Shinde et al reported that the 300-400 nm is Hg-free excitation and it has characteristics of solid-state lighting phosphors (33). Consequently, the entire characteristics of Eu 2+ -doped SrCaP 2 O 7 reveal that, it is a promising blue emitting single-host phosphor for solid-state lighting devices (mercury-free excited lamp phosphor), which can be used in a color converter using UV light as the primary light source.…”

Synthesis and luminescence properties of single‐component Ca5(PO4)3F:Dy3+, Eu3+ white‐emitting phosphors

“…For example, Ca 5 (PO 4 ) 3 F:Eu 2+ , Ca 5 (PO 4 ) 3 F:Tb 3+ , and other metal‐doped Ca 5 (PO 4 ) 3 F phosphors have been studied . However, there are few reports on the photoluminescence properties of Ca 5 (PO 4 ) 3 F:Dy 3+ phosphor until now, which can be used for fabricating w‐LEDs with white emission. As is known, Eu 3+ is widely used as a luminescence center in red‐emitting phosphors because of its 5 D 0 → 7 F 2 electron transition .…”