Effect of B2O3 on Long-Last Phosphorescence of SrAl2O4:Eu2+,Dy3+

Yu Hua Wang; Xin Yu Song; Shui He Zhang

doi:10.4028/www.scientific.net/MSF.610-613.403

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HomeMaterials Science ForumMaterials Science Forum Vols. 610-613Effect of B2O3 on Long-Last Phosphorescence of...

Effect of B₂O₃ on Long-Last Phosphorescence of SrAl₂O₄:Eu²⁺,Dy³⁺

Abstract:

A series of Sr0.95Al2O4:Eu2+0.02, Dy3+ 0.03•nB2O3 (0≤n≤0.30) were prepared by a solid state reaction. The role of B2O3 on the photoluminescence (PL) properties of Sr0.95Al2O4:Eu2+0.02, Dy3+0.03 were evaluated with UV emission spectra and decay curves. B2O3 significantly improved the emission intensity and persistent luminescence time. The crystal environment and defects induced by B3+ doping were detected with IR spectra, thermoluminescence and positron annihilation (PA) methods. Some Al3+ were substituted by B3+ and a kind of defect complex cluster responsible for the long decay time was formed when the substitution of Al3+ by B3+ occurs.