Photoluminescence and mechanoluminescence investigation of bluish-green afterglow SrMgAl 10 O 17 :Ce 3+ phosphor

In the present paper, we report the luminescence properties of bluish-green afterglow SrMgAl 10 O 17 :Ce 3+ phosphors prepared by combustion synthesis using urea as fuel. The phase purity, morphology and photoluminescence (PL) properties of discussed phosphor were characterized by X-ray diffraction, field emission scanning electron microscopy and PL spectra. Under ultraviolet excitation at 340 nm, the emission spectra exhibited two emission bands at 390 and 450 nm. Phosphorescence decay analysis of synthesized phosphor indicates bluish-green emission at 510 nm, which may be due to the presence of oxygen vacancies around Ce 3+ ions. Mechanoluminescence (ML) of gamma irradiated SrMgAl 10 O 17 :Ce 3+ samples with changing concentration of Ce were studied. The total ML intensity increases linearly with gamma dose up to 1770 Gy and results suggest that the phosphor SrMgAl 10 O 17 :Ce 3+ may be suitable for ML dosimetry of gamma radiation.