期刊
LIGHT-SCIENCE & APPLICATIONS
卷 11, 期 1, 页码 -出版社
SPRINGERNATURE
DOI: 10.1038/s41377-022-00803-x
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资金
- National Natural Science Foundation of China (NSFC) [51720105015, 51932009, 51929201, 52072349]
- Projects for Science and Technology Development Plan of Jilin Province [20210402046GH]
- Natural Science Foundation of Zhejiang Province [LR22E020004]
Fe3+-activated Sr2-yCay(InSb)(1-z)Sn2zO6 phosphors with long-wavelength near-infrared emission were reported. The overall emission tuning was achieved through crystallographic site engineering. These phosphors exhibited high internal quantum efficiency and showed great potential for near-infrared spectroscopy detection.
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-z)Sn2zO6 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.
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