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- W2945139205 abstract "Abstract A new phosphate Ba3In4(PO4)6 has been discovered in the exploration of novel host materials for color-tunable phosphors in BaO-In2O3-P2O5 system. The crystal-structure determination using powder XRD data reveals it belongs to the cubic langbeinite structure type (S.G. P213), unlike Mg3In4(PO4)6 crystallizing the triclinic system (S.G. P 1 ¯ ). The existence of PO4 has been verified by IR spectra of the title compound. DTA and experimental indicate that this new phosphate has a high melting point of ∼1293 °C. Combined with calculated electronic structure and experimental UV-Vis diffuse reflectance spectrum, it has a wide direct energy band gap which is favorable for host materials. The site symmetry of Eu3+ ions and the cross relaxation of Tb3+ ions in this matrix have been clarified according to their luminescence properties. Red-pink-green tunable emission can be realized adjusting the Eu3+ and Tb3+ contents. The quantum yields of representative phosphors under the excitation of 370–392 nm ultraviolet radiation have been measured and discussed. The PL intensity of Ba3In4(PO4)6: 0.02Eu3+, 0.015 Tb3+ phosphor at 423 K of is about 67% of that at 298 K. Present results indicate that the Ba3In4(PO4)6-based phosphors are valuable for the multicolor and stable thermal performance in the display and lighting fields." @default.
- W2945139205 created "2019-05-29" @default.
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- W2945139205 date "2019-08-01" @default.
- W2945139205 modified "2023-10-17" @default.
- W2945139205 title "Structure and luminescence properties of multicolor phosphors with excellent thermal stability based on a new phosphate Ba3In4(PO4)6" @default.
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- W2945139205 doi "https://doi.org/10.1016/j.jallcom.2019.05.059" @default.
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