荧光粉
近红外光谱
材料科学
兴奋剂
光谱学
光电子学
发光二极管
量子效率
发光
分析化学(期刊)
化学
光学
物理
色谱法
量子力学
作者
Dongjie� Liu,Guogang Li,Peipei Dang,Qianqian Zhang,Yi Wei,Lei Qiu,Мaxim S. Моlokeev,Hongzhou Lian,Mengmeng Shang,Jun Lin
标识
DOI:10.1038/s41377-022-00803-x
摘要
Abstract Near-infrared (NIR)-emitting phosphor-converted light-emitting diodes have attracted widespread attention in various applications based on NIR spectroscopy. Except for typical Cr 3+ -activated NIR-emitting phosphors, next-generation Cr 3+ -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 3+ -activated Sr 2− y Ca y (InSb) 1− z Sn 2 z O 6 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 Ca 2+ incorporation owing to the substitution-induced lower symmetry of the Fe 3+ sites. The Ca 2 InSbO 6 :Fe 3+ 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 Fe 3+ -activated broadband NIR-emitting phosphors and opens up a new avenue for designing NIR-emitting phosphor materials.
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