Effect of different RE dopants on phosphorescence properties of Sr₂Al₂SiO₇:Eu²⁺ phosphors

周威¹，马欣旭¹，张曼丽¹，罗懿²，夏志国³

1. School of Science, Beijing Technology and Business University2. School of Materials Sciences and Technology, China University of Geosciences3. School of Materials Sciences and Engineering, University of Science and Technology Beijing

摘 要：Different rare earth（RE） ions dopants were added into the SrAl2SiO7:Eu2+ phosphors in order to enhance the phosphorescence properties, and the effect of the RE ions including Yb3+, Ce3+, Nd3+, Dy3+ and Tm3+, was comparatively investigated. It was found that Nd3+ addition improved the phosphorescence properties obviously among all the studied RE ions. Therefore, Sr1.96–xAl2Si O7:x Eu2+,y Nd3+ phosphors were studied in detail, and the optimum Eu2+ and Nd3+ concentrations were determined with the afterglow time of about 20 min. The phase structures, photoluminescence（PL） properties, long-lasting phosphorescence（LLP） properties, afterglow decay curves and thermo-luminescence（TL） for the selected phosphors during the corresponding study were investigated. All the phosphors exhibited green PL emission and LLP emission. There were two TL bands located at about 325 and 380 K for the studied samples, and the relationship between RE addition and phosphorescence properties was discussed.

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