Abstract
A series of novel red tungsto-molybdate phosphors, LiEu1−xSmx(WO4)0.5(MoO4)1.5 (x = 0, 0.25%, 0.50%, 0.75%, 1.00%, 2.00%, 4.00%, 6.00%, 8.00% and 10.00%), were synthesized using conventional solid state reaction methods. The experimental results indicate that the introduction of Sm3+ changes neither the crystal structure nor the shape and position of the emission spectra. However, it extends the excitation region at 400 nm and enhances the emission at 615 nm. The reason for the improvement of red emission of Eu3+ by the introduction of Sm3+ and the energy transfer mechanism from Sm3+ to Eu3+ was investigated in detail.
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