Lai T.-T.Chang C.-C.Yang C.-Y.Das S.Lu C.-H.2019-05-132019-05-13201302728842https://scholars.lib.ntu.edu.tw/handle/123456789/407391SrAl 2O 4:Eu 2+ phosphors with various content of Bi 2O 3 flux were synthesized and analyzed. It was observed that the crystallinity and the particle size of the phosphors were increased with the addition of Bi 2O 3 flux. These phenomena are considered to be caused via the melting of the Bi 2O 3 flux particles during the synthesis of the phosphors. The melted Bi 2O 3 flux increased the mobility and homogeneity of solid reactants, thereby enhancing the photoluminescence intensity of the phosphors. SrAl 2O 4:Eu 2+ phosphors with Bi 2O 3 as the flux exhibited a broad green emission with a peak at 520 nm. The highest photoluminescence emission intensity was observed when 5 mol% Bi 2O 3 flux was added into the phosphors. The emission is due to 4f 65d¡÷4f 7 ( 8S 7/2) transitions of the Eu 2+ ions. Moreover, Bi 2O 3 flux extended the application of the ultraviolet excited phosphors toward the blue-light excited phosphors. Nevertheless, the influence of Bi 2O 3 on the afterglow and the emission color of SrAl 2O 4:Eu 2+ phosphors were not significant. This research indicated that Bi 2O 3 flux is effective flux for synthesizing SrAl 2O 4:Eu 2+ phosphors. ? 2012 Elsevier Ltd and Techna Group S.r.l.Bi 2O 3 fluxMorphologyPhotoluminescenceSrAl 2O 4:Eu 2+ phosphorsjournal article10.1016/j.ceramint.2012.06.0042-s2.0-84869090759https://www.scopus.com/inward/record.uri?eid=2-s2.0-84869090759&doi=10.1016%2fj.ceramint.2012.06.004&partnerID=40&md5=0eddb2bf9473ec23a8ad1e07a01fc91d