Near-Infrared Long Afterglow in Fe3+-Activated Mg2SnO4 for Self-Sustainable Night Vision.
Near-Infrared Long Afterglow in Fe3+-Activated Mg2SnO4 for Self-Sustainable Night Vision.
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DOI：
10.1021/acsami.3c00673
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发表时间：
2023-03
影响因子：
9.5
通讯作者：
Minzhong Li;Yahong Jin;Lifang Yuan;Bo Wang;Haoyi Wu;Yihua Hu;Feng Wang
中科院分区：
文献类型：
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作者：
Minzhong Li;Yahong Jin;Lifang Yuan;Bo Wang;Haoyi Wu;Yihua Hu;Feng Wang
近红外（NIR）余辉的出现在掺Cr 3+材料中激发了相当大的技术应用兴趣，这归因于具有良好穿透性的光的可持续发射。然而，开发高效率、低成本和精确光谱可调谐的无Cr 3+近红外余辉荧光粉仍然是一个悬而未决的问题。本文报道了一种新型的Fe ~（3+）激活的Mg_2SnO_4（MSO）近红外长余辉发光材料，其中Fe ~（3+）离子占据四面体[Mg-O_4]和八面体[Sn/Mg-O_6]位置，产生了720-789 nm的宽带近红外发射。由于能级对齐，从陷阱中释放的电子通过隧穿优先返回到四面体位置中的Fe 3+的激发能级，导致以789 nm为中心的单峰近红外余辉，半峰全宽（fwhm）为140 nm。高效率的近红外余辉，显示持续时间超过31小时的记录之间的Fe 3+为基础的磷光体，被证明是一个自我可持续的光源夜视应用。该工作不仅为技术应用提供了一种新型的Fe 3+掺杂的高效近红外余辉荧光粉，而且为合理调节余辉发射提供了实际指导。
The advent of near-infrared (NIR) afterglow in Cr3+-doped materials has stimulated considerable interest in technological applications owing to the sustainable emission of light with good penetrability. However, the development of Cr3+-free NIR afterglow phosphors with high efficiency, low cost, and precise spectral tunability is still an open question. Herein, we report a novel Fe3+-activated NIR long afterglow phosphor composed of Mg2SnO4 (MSO), in which Fe3+ ions occupy the tetrahedral [Mg-O4] and octahedral [Sn/Mg-O6] sites, giving rise to a broadband NIR emission spanning 720-789 nm. On account of energy-level alignment, the electrons released from the traps show a preferential return to the excited energy level of Fe3+ in tetrahedral sites through tunneling, leading to a single-peak NIR afterglow centered at 789 nm with a full-width at half-maximum (fwhm) of 140 nm. The high-efficiency NIR afterglow, showing a record persistent time lasting over 31 h among Fe3+-based phosphors, is demonstrated as a self-sustainable light source for night vision applications. This work not only provides a novel Fe3+-doped high-efficiency NIR afterglow phosphor for technological applications but also establishes practical guidance for rational tuning of afterglow emissions.