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- W4377012685 abstract "Abstract In order to develop an efficient and stable broadband cyan phosphor for full spectrum white lighting emitting diodes (wLEDs), novel Ba 9 Lu 2 Si 6 O 24 :Eu 2+ , xCa 2+ is designed and synthesized. Ca‐substitution induces Eu 2+ ions into Lu 3+ crystallographic site, which achieve rare nonequivalent cation substitution of Eu 2+ . Effects of Ca‐substitution on crystal structure of matrix and phosphor are investigated by X‐ray photoelectron spectroscopy, X‐ray powder diffraction, transmission electron microscopy, and density functional thoery (DFT). Ba 9 Lu 2 Si 6 O 24 :Eu 2+ , xCa 2+ can be effectively excited by with near‐ultraviolet (NUV) and exhibit broadband cyan emission with full width at half maximum (FWHM) of 119.7 nm at x = 0.2, due to the multisite luminescence centers. For the sample x = 0.2, the internal quantum efficiency is 92.61%, and the luminous intensity at 423 K remains 89% of that measured at room temperature. The rigid structure of [SiO4]‐[LuO6]‐[SiO4] doped with Eu2+ ion makes Ca‐substituted samples exhibit excellent luminescence efficiency and thermal stability. Our work develops a significant strategy based on multisite cation regulation to explore NUV‐excited broadband cyan phosphors for full spectrum wLEDs." @default.
- W4377012685 created "2023-05-19" @default.
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- W4377012685 date "2023-05-24" @default.
- W4377012685 modified "2023-10-17" @default.
- W4377012685 title "Efficient, stable, broadband cyan‐emitting Ca‐substituted Ba<sub>9</sub>Lu<sub>2</sub>Si<sub>6</sub>O<sub>24</sub>:Eu<sup>2+</sup> with multisite luminescence for NUV‐wLEDs" @default.
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- W4377012685 doi "https://doi.org/10.1111/jace.19198" @default.
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