《Tab.1 The values ofτ1, τ2andτ*for decay curves ofα-Ba3Y1-x (BO3) 3∶x Dy3+.》

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《α-Ba_3Y(BO_3)_3∶Dy~(3+)荧光粉的合成及其发光性能（英文）》

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τ*=（A1τ12+A2τ22）/（A1τ1+A2τ2），（3） parametersτ1，τ2andτ*for decay curves ofα-Ba3Y1-x（BO3）3∶x Dy3+are demonstrated in Tab.1.The average distance between two Dy3+ions decreases with the increasing Dy3+concentration，which enhances the energy migration or cross-relaxation between different Dy3+ions via the dipole-dipole interaction or exchange interaction and decreases the luminescence lifetime from 0.808 ms to 0.360ms[20，27-28].The second-order exponential curves generate from the presence of two luminescence centers formed by Dy3+taking both Y1/Y2（CN:6）and Ba3/Ba4 sites（CN:9）；the experimental behavior ofα-Ba3Y1-x（BO3）3∶x Dy3+can be ascribed to a linear superposition of DyⅠ3+and DyⅡ3+.