کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1495142 | 992927 | 2013 | 6 صفحه PDF | دانلود رایگان |
The Lu0.8Sc0.2BO3 polycrystalline powders doped with 1 at%Ce3+ and co-doped with Ca2+, Mg2+, or Sr2+ with varying concentration were fabricated by conventional solid-state reaction method. We applied X-ray diffraction, optical diffuse reflectance spectrum, luminescent spectra under UV and X-ray excitation, fluorescence decay time and X-ray absorption near edge spectroscopy to study the effects of divalent ions co-doping on the Lu0.8Sc0.2BO3:Ce scintillation materials. Through experiments, the influence of divalent ions co-doping strategy on scintillation efficiency and the action mechanism were revealed.
► No positive contribution of the Me2+ ions on the scintillation efficiency was found.
► Parasite emission located around 380–400 nm for certain Me2+ co-doping ions.
► The Ce3+-distorted luminescence center formed after Me2+ co-doping.
► Point defects and Ce4+ concentration increasing were responsible for the deterioration.
Journal: Optical Materials - Volume 35, Issue 3, January 2013, Pages 520–525