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- W3173260308 abstract "Abstract The discovery of highly efficient broadband near infrared (NIR) emission material is urgent and crucial for constructing NIR lighting sources and emerging applications. Herein, a series of NIR emission hexafluorides A 2 BMF 6 :Cr 3+ (A = Na, K, Rb, Cs; B = Li, Na, K, Cs; M = Al, Ga, Sc, In) peaking at ≈733–801 nm with a full width at half maximum (FWHM) of ≈98–115 nm are synthesized by a general ammonium salt assisted synthesis strategy. Benefiting from the pre‐ammoniation of the trivalent metal sources, the Cr 3+ can be more efficiently doped into the A 2 BMF 6 and simultaneously prevent the generation of the competitive phase. Particularly, Na 3 ScF 6 :Cr 3+ (λ em = 774 nm, FWHM ≈ 108 nm) with optimal Cr 3+ ‐doping concentration of 35.96% shows a high internal quantum efficiency of 91.5% and an external quantum efficiency of ≈40.82%. A lighting emitting diode (LED) device with a NIR output power of ≈291.05 mW at 100 mA driven current and high photoelectric conversion efficiency of 20.94% is fabricated. The general synthesis strategy opens up new avenues for the exploration of Cr 3+ ‐doped high efficiency phosphors, and the as‐obtained record NIR output power demonstrates for NIR LED lighting sources applications." @default.
- W3173260308 created "2021-07-05" @default.
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- W3173260308 date "2021-06-24" @default.
- W3173260308 modified "2023-10-10" @default.
- W3173260308 title "A General Ammonium Salt Assisted Synthesis Strategy for Cr<sup>3+</sup>‐Doped Hexafluorides with Highly Efficient Near Infrared Emissions" @default.
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- W3173260308 doi "https://doi.org/10.1002/adfm.202103743" @default.
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