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- W2760366819 abstract "Abstract The luminescent properties of Eu2+ ions are strongly influenced by their occupied position in host. In this paper, the luminescent properties of Eu2+ in BaCdP2O7: Eu2+ phosphor were studied from experimental and theoretical aspects. BaCdP2O7: xEu2+ (0.01 ≤ x ≤ 0.06) phosphors, synthesized by a solid-state reaction method under CO atmosphere, exhibited a strong asymmetric blue-green emission at 445 nm. X-ray powder diffraction (XRD) characterization and the Rietveld structural refinements for BaCdP2O7 show that there are a 9-coordinated Ba2+ lattice site and a 6-coordinated Cd2+ lattice site in BaCdP2O7 compound. The emission spectrum can be fitted well by two Gaussian peaks at 436 nm and 487 nm, implying that both Ba2+ and Cd2+ lattice sites may be occupied by Eu2+ ions. The calculation using the empirical Van Uitert equation further qualitatively reveals that Eu2+ occupies both Ba2+ and Cd2+ sites, and then emits blue (436 nm) and green (487 nm) light, respectively. Furthermore, above results are also confirmed by the results of the periodic density-functional theory (DFT) and activation energy (Ea) calculations. Namely, our simulations and experiments simultaneously provide the proof that Eu2+ can replace both Ba2+ and Cd2+ to be a blue-green phosphor. In addition, concentration quenching mechanism, temperature-dependent luminescence and CIE chromaticity coordinate of the BaCdP2O7: Eu2+ phosphors were also investigated in this work. All the results indicate that BaCdP2O7: Eu2+ phosphor is a potential blue-green phosphor for near ultraviolet-based white-emitting diodes (WLEDs)." @default.
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- W2760366819 date "2018-02-01" @default.
- W2760366819 modified "2023-10-16" @default.
- W2760366819 title "Luminescent properties of Eu2+ in BaCdP2O7: Eu2+ phosphor: Experimental and theoretical analysis" @default.
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- W2760366819 doi "https://doi.org/10.1016/j.dyepig.2017.09.065" @default.
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