Abstract
A series of apatite-type Sr6Gd2Na2(PO4)6F2:Tb3+, Eu3+ phosphors have been successfully synthesized by the high-temperature solid-state reaction method. Phase structures were examined based on X-ray diffraction, the results indicated that the obtained Sr6Gd2Na2(PO4)6F2:Tb3+, Eu3+ samples were well crystallized without impurity phase. The photoluminescence emission and excitation spectra and the decay curves were investigated in detail. The main energy transfer from Tb3+ to Eu3+ was verified to compliance with the dipole-quadrupole mechanism. The luminescence colors of the Sr6Gd2Na2(PO4)6F2:Tb3+, Eu3+ phosphors can be easily tuned from green light (0.2570, 0.3766) to white light (0.3674, 0.2813) by adjusting the proportion of Tb3+ and Eu3+ ions. The investigations indicated that the Sr6Gd2Na2(PO4)6F2:Tb3+, Eu3+ phosphors can be used as a qualified candidate for application in white light-emitting diodes.
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Du, H., Zhou, W., Niu, J. et al. Energy transfer and tunable photoluminescence of Sr6Gd2Na2(PO4)6F2:Tb3+, Eu3+ phosphors for near-UV white LEDs. J Mater Sci: Mater Electron 30, 18575–18583 (2019). https://doi.org/10.1007/s10854-019-02210-2
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DOI: https://doi.org/10.1007/s10854-019-02210-2