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- W4383196800 abstract "A series of spectrally tunable Dy3+/Eu3+-coactivated double perovskites SrLaLiTeO6 (SLLT) were synthesized via solid-state ceramic route under air condition. Considering differences of ionic radius and valences among the dopants and host cations, Dy3+/Eu3+ are all inclined to enter La site, though slight occupations in Sr site cannot be completely ruled out. Dy shows narrow band emissions in blue (B) to yellow (Y) region, which is stemmed from magnetic (4F9/2 → 6H15/2) and electric (4F9/2 → 6H13/2) dipole transitions, respectively. Eu3+ exhibits orange-red (O–R) emissions, with two dominant peaks located at ∼ 593 and 617 nm from magnetic (5D0 → 7F1) and electric (5D0 → 7F2) dipole transitions, which could be used as compensation for the red-emitting portion in pc-wLEDs via energy transfer (ET) from Dy to Eu to overcome the disadvantage of low excitation efficiency. The substitutional local site symmetry could be regularly modified along with severely impacting on Y/B and R/O ratios for Dy and Eu emission colors via simply modifying the doping contents, due to changes in bond lengths and Coulomb potentials from interconnected octahedrons [LiO6] and [TeO6] around the dopants. The fabricated pc-wLED via combining a commercial n-UV LED chip with the SLLT: Dy/Eu, exhibited splendid EL performance, with the CIE coordinate is calculated to be (0.3690, 0.3539), CCT of 3232 K, and CRI (Ra) of 86.5. Altogether, it manifests that the stable SLLT: Eu and SLLT: Dy/Eu are potentially good candidates for applications as red and white phosphors, respectively in indoor plant growth LED and pc-wLEDs." @default.
- W4383196800 created "2023-07-06" @default.
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- W4383196800 date "2023-10-01" @default.
- W4383196800 modified "2023-10-16" @default.
- W4383196800 title "Insights into structure, local site symmetry, and energy transfer for regulating luminescent properties of SrLaLiTeO6: Dy/Eu and its application in wLEDs" @default.
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- W4383196800 doi "https://doi.org/10.1016/j.ceramint.2023.07.047" @default.
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