Structure and tunable luminescence of Tm3+/Dy3+ doped KBaIn2(PO4)3 phosphors with high thermal stability

In order to investigated the new single-component white light emitting phosphate, Tm3+/Dy3+ doped KBaIn2(PO4)3 (KBIP) were successfully synthesized by solid state reaction. The structures of the compounds were investigated by XRD technique and Rietveld refinement methods. The luminescence properties were acquired and carefully analyzed. Meanwhile, the energy transfer process of Dy3+ and Tm3+ co-doped KBIP were investigated in detail. The KBIP: 0.05Dy3+ phosphor can obtain the single neutral white with the chromaticity coordinate of (0.3218, 0.3307) and CCT value of 6018 K, while the emitting color of Dy3+ and Tm3+ co-doped KBIP could be adjusted from blue to near white. Furthermore, the overall integral intensity at 150 °C of 0.05 Tm3+ and 0.05Dy3+ co-doped KBIP is 80.5% of that at 25 °C. The results are indicate Dy3+/Tm3+ doped KBIP phosphors own potential application in future wLEDs.