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Herein, we introduce a strategy for the fabrication of a sunlight-activated green luminescent Eu2+/Dy3+ doped strontium aluminate (Sr1−x−yAl2O4:Eux2+/Dyy3+) assisted long persistent, transparent, flexible and water resistant phosphorescent layer via a customized solid state reaction-solution casting method. The XRD result of as-synthesized phosphor shows a pure monoclinic crystal structure with the space group P21. This as-synthesized phosphor exhibits green afterglow emission with a broad band peaking ∼528 nm upon a broad range of excitation wavelengths from 368–418 nm, which is ascribed to the characteristic 4f65d1 → 4f7 electronic dipole allowed transition of Eu2+ ions. Moreover, the role of Dy3+ as an auxiliary activator significantly prolongs the afterglow duration to a large extent by increasing the number of electron traps and their trap depths in the vicinity of Eu2+. Accordingly, a brighter …
Royal Society of Chemistry
Publication date: 
1 Jan 2015

Arun Kumar, Garima Kedawat, Pawan Kumar, Jaya Dwivedi, Bipin Kumar Gupta

Biblio References: 
Volume: 39 Issue: 5 Pages: 3380-3387
New Journal of Chemistry