Luminescence associated with Eu3+ in two host lattices

摘要

The photoluminescence (PL) and low-temperature thermoluminescence (LTTL) of the Eu3+ ion in Sr₃Al₂O₆ and Sr₂CeO₄ phosphors, singly doped and co-doped with other trivalent rare-earth ions, are described. The phosphors were synthesised by the sol-gel technique and X-ray diffraction patterns revealed that both were of single phase. PL emission peaks for Sr₃Al₂O₆:Eu3+, RE3+ (RE3+ = Sm, Er and Tb) were observed around 580-620 nm whereas the emission of Sr₂CeO₄:Eu3+ shows peaks around 466, 490, 512, 537, 556, 585, 616 and 654 nm. The LTTL glow curves of X-ray irradiated Sr₃Al₂O₆: Eu3+, RE3+ and Sr₂CeO₄:Eu3+ phosphors were measured at temperatures ranging from 80 to 200 K. The LTTL glow curves reveal new results concerning the trapping levels in the materials doped with trivalent europium.View full textDownload full textKeywordsceramics, chemical synthesis, X-ray diffraction, luminescence, thermoluminescenceRelated var addthis_config = { ui_cobrand: "Taylor & Francis Online", services_compact: "citeulike,netvibes,twitter,technorati,delicious,linkedin,facebook,stumbleupon,digg,google,more", pubid: "ra-4dff56cd6bb1830b" }; Add to shortlist Link Permalink http://dx.doi.org/10.1080/09500839.2010.491804