Sm3+-activated Y2O2S red phosphors were prepared by the combustion method and microemulsion method at the first time.X-ray characterization and electron difraction show that,Y2O2S:Sm3+,Ti4+,Mg2+samples prepared by these two methods are pure hexagonal crystals in structure with a trivial change due to dopants.Scanning electron microscopy(SEM)results show that the product presents an almond-like sheet in uniform size.Under the excitation of 269 nm ultraviolet light,Y2O2S:Sm3+samples fabricated by these two methods exhibit three main groups of red emission lines located at 564,604,and 656 nm,respectively,which are attributed to the transitions of 4G5/2→6H5/2,4G5/2→6H7/2,4G5/2→6H9/2,respectively.The samples prepared by microemulsion are seven times higher in fluorescent emission intensity and half time longer in afterglow time than that prepared by combustion. Sm3 + -activated Y2O2S red phosphors were prepared by the combustion method and microemulsion method at the first time. X- ray characterization and electron difraction show that, Y2O2S: Sm3 +, Ti4 +, Mg2 + samples prepared by these two methods are pure hexagonal crystals in structure with a trivial change due to dopants. Scanning electron microscopy (SEM) results show that the product presents an almond-like sheet in uniform size. Under the excitation of 269 nm ultraviolet light, Y2O2S: Sm3 + samples fabricated by these two methods exhibit three main groups of red emission lines located at 564,604, and 656 nm, respectively, which are attributed to the transitions of 4G5 / 2 → 6H5 / 2,4G5 / 2 → 6H7 / 2,4G5 / 2 → 6H9 / 2, samples prepared by microemulsion are seven times higher in fluorescent emission intensity and half time longer in afterglow time than that prepared by combustion.