Characterization of host-lattice emission and energy transfer in BaMgAl10O17:Eu2+

The photoluminescence properties of Ba0.95−M B8O13:Eu3+ (M = Ca, Sr, 0 ≤x≤ 0.1) in 100–400 nm regions

“…The excitation spectra had a broad in the region of 180-260 nm which should be the two bands overlapped because of the non-symmetry shape of the excitation band in the spectrum. The one would be attributed to the Ba-O absorption because the many former reports about BAM:Eu 2+ have identified that Ba-O absorption band is about 180 nm [31][32][33]. Except the BAM, the absorption band of Ba-O was also reported in the Ba 2 SnO 4 :Eu 3+ [17].…”

Optical properties of Ba0.75Al11O17.25–BaMgAl10O17:Mn solid solution

“…Nevertheless, Pike and Diaz reported that undoped BAL and BAM have host lattice emissions at 285 and 263 nm responsible for the exciton recombination at Ba-O groups [2], in which the former's is much weaker than that of the latter. Moreover, the host emission of BAM at 263 nm overlaps very well with the direct excitation in Eu 2+ [2,23], but cannot be reused by Mn 2+ [15]. Hence the energy transfer from mirror layer to Mn 2+ and the exciton recombination at Ba-O groups form a competitive relationship.…”

Combustion synthesis of phosphors for plasma display panels

“…Excitation at wavelengths shorter than 150 nm takes place via the spinel blocks, while excitation between 150 and 190 nm occurs in BaO groups. The efficient host-to-activator energy transfer makes BaMgAl 10 O 17 :Eu 2+ a good PDP phosphor [11]. How- ever, BaMgAl 10 O 17 :Eu 2+ performance is marred by degradation.…”

“…The degradation of BAM sample decreases emission efficiency, shifts emission peaks, increases FWHM and shifts chromaticity coordinates. The mechanism of degradation has been discussed frequently [11][12][13][14]. Part of decrease in intensity is due to precipitation as EuMgAl 11 O 19 [7].…”

“…BaMgAl 10 O 17 :Eu degrades fast. Precipitation of Eu as EuMgAl 11 O 19 is one of the factors affecting the stability of this compound [7]. In order to improve the performance of PDP devices, novel phosphors with high luminescent efficiency and stability have been searched.…”