Dy3+ and Tm3+ doped YGa3(BO3)4 for near ultraviolet excited white phosphors

Dy3+ and Tm3+ singly and co-doped YGa3(BO3)4 were synthesized by solid state reactions. Rietveld refinements confirmed that Dy3+ and Tm3+ replace Y3+ and locate in a triangular prism environment, which is beneficial for their f-f absorptions in near UV range. Since there is no energy transfer, tuning the content of Dy3+ and Tm3+ leads to the white emission with the CIE coordinate of (0.325, 0.329).301