Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7839975 | Journal of Luminescence | 2018 | 5 Pages |
Abstract
Two kinds of warm-toned (yellow/orange-emitting) long-lasting phosphorescent composites, namely, SiO2/red-emitting color converter@SrAl2O4:Eu2+, Dy3+ (SiO2/RECC@SAOED) and PMMA/red-emitting color converter@SrAl2O4:Eu2+, Dy3+ (PMMA/RECC@SAOED), were prepared in this study. Their morphological and luminescent properties were compared with those of the uncoated SAOED phosphor and analyzed in detail. SiO2/RECC@SAOED and PMMA/RECC@SAOED particles presented a coarse surface with an increased diameter of 12â¯Âµm. In addition to the first emission peak at 525â¯nm similar to that of the uncoated SAOED, an emission peak occurred in the emission spectra of SiO2/RECC@SAOED and PMMA/RECC@SAOED at 610 and 612â¯nm, respectively. The chromaticity coordinates of SiO2/RECC@SAOED and PMMA/RECC@SAOED moved to the yellow (xâ¯=â¯0.3769, yâ¯=â¯0.5006) and orange (xâ¯=â¯0.4647, yâ¯=â¯0.4671) areas compared with those of the uncoated SAOED in the green area (xâ¯=â¯0.2781, yâ¯=â¯0.5777). The afterglow decay curve revealed that the afterglow property of SiO2/RECC@SAOED was better than that of PMMA/RECC@SAOED.
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Authors
Zhi Chen, Ya'nan Zhu, Xuefeng Guo, Mengjuan Li, Mingqiao Ge,