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Highly efficient Fe3+-doped A2BB'O6 (A = Sr2+, Ca2+; B, B' = In3+, Sb5+, Sn4+) broadband near-infrared-emitting phosphors for spectroscopic analysis.

ABSTRACT: Near-infrared (NIR)-emitting phosphor-converted light-emitting diodes have attracted widespread attention in various applications based on NIR spectroscopy. Except for typical Cr3+-activated NIR-emitting phosphors, next-generation Cr3+-free NIR-emitting phosphors with high efficiency and tunable optical properties are highly desired to enrich the types of NIR luminescent materials for different application fields. Here, we report the Fe3+-activated Sr2-yCay(InSb)1-zSn2zO6 phosphors that exhibit unprecedented long-wavelength NIR emission. The overall emission tuning from 885 to 1005 nm with broadened full-width at half maximum from 108 to 146 nm was realized through a crystallographic site engineering strategy. The NIR emission was significantly enhanced after complete Ca2+ incorporation owing to the substitution-induced lower symmetry of the Fe3+ sites. The Ca2InSbO6:Fe3+ phosphor peaking at 935 nm showed an ultra-high internal quantum efficiency of 87%. The as-synthesized emission-tunable phosphors demonstrated great potential for NIR spectroscopy detection. This work initiates the development of efficient Fe3+-activated broadband NIR-emitting phosphors and opens up a new avenue for designing NIR-emitting phosphor materials.

SUBMITTER: Liu D 

PROVIDER: S-EPMC9046267 | biostudies-literature | 2022 Apr

REPOSITORIES: biostudies-literature

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Highly efficient Fe<sup>3+</sup>-doped A<sub>2</sub>BB'O<sub>6</sub> (A = Sr<sup>2+</sup>, Ca<sup>2+</sup>; B, B' = In<sup>3+</sup>, Sb<sup>5+</sup>, Sn<sup>4+</sup>) broadband near-infrared-emitting phosphors for spectroscopic analysis.

Liu Dongjie D   Li Guogang G   Dang Peipei P   Zhang Qianqian Q   Wei Yi Y   Qiu Lei L   Molokeev Maxim S MS   Lian Hongzhou H   Shang Mengmeng M   Lin Jun J  

Light, science & applications 20220427 1

Near-infrared (NIR)-emitting phosphor-converted light-emitting diodes have attracted widespread attention in various applications based on NIR spectroscopy. Except for typical Cr<sup>3+</sup>-activated NIR-emitting phosphors, next-generation Cr<sup>3+</sup>-free NIR-emitting phosphors with high efficiency and tunable optical properties are highly desired to enrich the types of NIR luminescent materials for different application fields. Here, we report the Fe<sup>3+</sup>-activated Sr<sub>2-y</su  ...[more]

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