Effect of oxygen vacancies on the red phosphorescence of Sr_2SnO_4:Sm^3+ phosphor Xu, Xuhui ; Wang, Yuhua ; Gong, Yu ; Zeng, Wei ; Li, Yanqin Abstract Publication: Optics Express Pub Date: August 2010 DOI: 10.1364/OE.18.016989 Bibcode: 2010OExpr..1816989X