Structural and Optical Properties of BaMgAl₁₀O₁₇:Eu²⁺ Phosphor.

Abstract

with AlF 3 as a flux (1400-1420°C, 1 h). Neutron diffraction and powder XRD, and luminescence and XANES spectroscopy reveal its structural and optical properties as a function of Eu concentration. The phosphor crystallizes in the space group P6 3 /mmc. BaMgAl 10 O 17 :Eu 2+ exhibits a strong emission band around 450 nm (254 nm excitation). The critical Eu concentration is estimated from the concentration dependencies of the absolute quantum efficiency and the intensity of the photoluminescence. The intensity of the blue luminescence reaches a maximum at 11.6 mol% Eu. The phosphor is of great interest for use in plasma display panels.

Ultra‐narrow band blue emission of Eu2+ in halogenated (Alumino)borate systems based on high lattice symmetry

“…Especially, the high pure blue phosphor is necessary for backlit display. However, the commercially available blue phosphor such as BaMgAl 10 O 17 :Eu 2+ (BAM:Eu 2+ ) could not completely meet the color purity requirement of backlit display due to the broad fwhm . Another reported blue emitting phosphors have either unsuitable excitation position or broad emission band, which are also not extensively applied in backlit display.…”

Synthesis and Luminescence Properties of Blue‐Emitting Phosphor Eu2+‐Doped Zinc Fluoro‐Phosphate Zn2[PO4]F

“…The photoluminescence absolute QE, i.e., internal QE, of Zn 2 PO 4 F:Eu 2+ phosphor was measured to be 61% at the excitation of 365 nm light at 300 K. This QE value is still lower than blue‐emitting BAM:Eu 2+ phosphors such as BaMgAl 10 O 17 :Eu 2+ 11.6 mol% (λ ex = 254 nm, λ em = 450 nm, QE = 92.4%) and BaMgAl 10 O 17 :Eu 2+ 2 mol% (λ ex =254 nm, λ em = 450 nm, QE = 70%) . But the QE value of Zn 2 PO 4 F:Eu 2+ phosphor is bigger than Eu 2+ ‐doped sulfides such as CaSrS:Eu 2+ 1 mol% (λ ex = 350 nm, λ em = 663 nm, QE = 53.4%) .…”

Preparation and luminescent properties of Eu-doped BaTiO3 thin films by sol–gel process

“…7 F j transition of Eu 3þ ions. Europium is known to have valence states both 2 þ and 3 þ , and many Eu-doped phosphor materials, such as europium silicate [22,23], Eudoped BaMgAl 10 O 17 [24,25], barium aluminum oxynitride [26], have been reported to experience a reduction of europium from trivalent state to divalent state during sintering. Different from the luminescence spectrum of Eu 3þ ion, luminescence of Eu 2þ ion involves an electricdipole allowed transition 4f 6 5d 1 !…”