荧光粉
光致发光
光谱学
材料科学
兴奋剂
光电子学
发光二极管
分析化学(期刊)
化学
物理
色谱法
量子力学
作者
Xiao He,Yuhui Chen,Chenglong Xia,Kamran Muhammad,Zahra Duaa Syeda,Yue Guo,Siyuan Xie,Xiaoguang Liu,Ling Li
摘要
Abstract Near‐infrared (NIR) broadband emitting phosphors regarded as ideal miniaturized NIR light sources, have recently received considerable attention. Nevertheless, the lack of appropriate substitutes for poisonous Cr 3+ still poses a significant obstacle. Here, by selecting double perovskite‐type antimonates compound Ca 2 LuSbO 6 (CLSO) and Ca 2 YSbO 6 (CYSO) as the hosts, the broadband NIR‐emitting CLSO: 0.008Fe 3+ and CYSO: 0.01Fe 3+ phosphors are firstly reported. The above materials exhibit a rare long‐wavelength NIR emission band peaking at 927 and 938 nm, respectively. Accordingly, their full widths at half maximum are 128 and 135 nm, respectively. Moreover, the mechanism of their concentration quenching and thermal quenching effect are discussed. The IQEs of CLSO: 0.008Fe 3+ is measured to be 69%, which is superior to many available Fe‐activated phosphors. Integrating the bond valence theory analysis with electron paramagnetic resonance measurement, Fe 3+ only substitutes the lattice site of the Sb atom to generate a [FeO 6 ] octahedron accompanying lattice distortion. Significantly, the as‐fabricated phosphor‐converted light emitting diodes device shows substantial applications in night vision and NIR spectroscopy detection. This work contributes to novel insights into the photoluminescence and site occupancy of Fe 3+ , thereby paving a new avenue for exploring next‐generation environmentally‐friendly and nontoxic NIR light‐emitting materials.
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