Abstract
In this paper, Dy3+ single-doped, Dy3+-Sm3+ double-doped and Dy3+-Sm3+-Tb3+ triple-doped Na0.98Sr0.02Y(MoO4)0.8(WO4)1.2 phosphors were synthesized using hydrothermal method and their structures, luminescent properties and thermal stability were investigated. The prepared single-doped, double-doped and triple-doped series of Na0.98Sr0.02Y(MoO4)0.8(WO4)1.2 phosphors all exhibited a tetragonal scheelite structure. Na0.98Sr0.02Y0.926(MoO4)0.8(WO4)1.2: 2%Dy3+, 5%Sm3+, 0.4%Tb3+ phosphor correlated with correlated color temperature of 5611 K and chromaticity coordinates of (0.33, 0.3284), achieving white light emission. Moreover, the Na0.98Sr0.02Y0.926(MoO4)0.8(WO4)1.2: 2%Dy3+, 5%Sm3+, 0.4%Tb3+ phosphor exhibited a maximum activation energy value of 0.17 eV, indicating excellent thermal stability.
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