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8528943 
Journal Article 
Effects of simultaneous change of Mg2+ and Ti4+ contents on the luminescence properties of Y2O2S:Eu3+, Mg2+, Ti4+ nanotubes 
Liu, Dan; Huang, P; Cui, C; Wang, Lei; Jiang, G; , 
2014 
1 
Ceramics International
ISSN: 0272-8842
EISSN: 1873-3956 
ELSEVIER SCI LTD 
OXFORD 
117-122 
WOS:000330820500016 
Red long-lasting phosphor Y2O2S:Eu3+, Mg2+, Ti4+ nanotubes were synthetized by the hydrothermal method. The effects of simultaneous change of Mg2+ and Ti4+ contents on the luminescence properties were investigated. The samples were characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), photoluminescence (PL), and thermoluminescence spectra (TL). XRD investigation revealed that the precursors was a pure phase of Y(OH)(3) and the sulfuretted samples was a pure phase Y2O2S. SEM observation showed that the sulfuretted phosphors inherited the tube-like shape from the precursors. Under 325 nm UV excitation, the samples exhibited the strongest red emission at 627 nm, which corresponded to the transition from D-5(0) to F-7(2) level of Eu3+ ion. When the content of (Mg2+, Ti4+) multiple-ion dopant was 3.0%, the trap depth of sample was 0.9 eV and the decay time could last for over 450 s (>= 1 mcd/m(2)) after 365 nm UV radiation for 10 min. (C) 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved.