The effects of re-firing process under oxidizing atmosphere and temperatures on the properties of strontium aluminate phosphors

Atomic layer deposition (ALD) of nanoscale coatings on SrAl2O4‐based phosphor powders to prevent aqueous degradation

“…In general, all powders still show a broad excitation spectrum between 275‐475 nm and an emission maximum at about 530 nm. The broad emission band is attributed to a typical 4f 6 5d 1 → 4f 7 transition of Eu 2+ ions . Changes to the excitation spectra like the ones observed after ALD have been attributed to changes in crystal field splitting for the Eu 2+ ion due to crystalline quality and powder size .…”

“…The broad emission band is attributed to a typical 4f 6 5d 1 → 4f 7 transition of Eu 2+ ions. 1,4,10,24 Changes to the excitation spectra like the ones observed after ALD have been attributed to changes in crystal field splitting for the Eu 2+ ion due to crystalline quality and powder size. [25][26][27] Such changes to the electronic state of Eu 2+ lead to variability in the intensities of the excitation spectra at 322 and 360 nm as seen here.…”

Effect of Sr on the luminescence properties of Eu3+ activated xZnO-(1-x) SrO-Al2O3 phosphors

“…Since ZnAl 2 O 4 is an earth-abundant host lattice, its usage as lanthanide emitter can reduce the cost of the material [8]. Researchers prefer alkaline earth aluminates than sulphides as ideal host material due to their chemical stability [12]. RE metal ions, when doped in the strontium aluminate based host material, results in intense luminescence in the blue to the green region having superior stability, efficiency and afterglow [13].…”

“…RE metal ions, when doped in the strontium aluminate based host material, results in intense luminescence in the blue to the green region having superior stability, efficiency and afterglow [13]. Strontium aluminates doped with europium are capable of producing significant phosphorescence and emission in the visible region [12]. Modification in luminescence properties of phosphors to obtain better and stable emissions are the current field of experimentation.…”

Luminescence properties of M2TiO4:Eu3+, Li+ (M:Mg, Ca) and MgAl2O4:RE3+ (RE3+:Ho3+, Sm3+, and Yb3+)

“…Therefore, these materials include both phosphorescent materials, which show a slow decay in brightness ([1 ms) and longer luminescence property, and fluorescent materials, where the emission decay takes place over tens of nanoseconds. Phosphor materials are widely applied in lighting, displays, lasers, and scintillators, and additionally it is necessary that the phosphor host structure should exhibit good optical, mechanical, and thermal properties [1,2].…”