Detection of Up-converted Persistent Luminescence in the Near Infrared Emitted by the Zn3Ga2GeO8: Cr3+, Yb3+, Er3+ Phosphor
Detection of Up-converted Persistent Luminescence in the Near Infrared Emitted by the Zn3Ga2GeO8: Cr3+, Yb3+, Er3+ Phosphor
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DOI：
10.1103/physrevlett.113.177401
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发表时间：
2014-10-21
影响因子：
8.6
通讯作者：
Pan, Zhengwei
中科院分区：
文献类型：
--
作者：
Liu, Feng;Liang, Yanjie;Pan, Zhengwei
上转换发光和长余辉发光是两种研究较多的特殊发光过程。通过结合这两个发光过程的独特功能，在这里，我们设计了一个新的发光过程称为上转换持久发光（UCPL），这使我们能够产生持久发光具有发射能量高于激发能量。在UCPL概念的指导下，通过在Zn 3Ga 2GeO 8：1%Cr ~（3+）近红外余辉材料中引入上转换离子对Yb ~（3+）/Er ~（3+），制备了第一种UCPL荧光粉Zn 3Ga 2GeO 8：1%Cr ~（3+），5%Yb ~（3+），0.5%Er ~（3+）。在980 nm激光激发下，该荧光粉发出峰值在700 nm的长时间（> 24 h）近红外持续发射。UCPL的概念和相关的磷光体预计将有重要的影响，如生物医学成像的几个领域。
Up-conversion luminescence and long-persistent luminescence are two well-studied, special luminescence processes. By combining the unique features of these two luminescence processes, here we design a new luminescence process called up-converted persistent luminescence (UCPL), which enables us to generate persistent luminescence having an emission energy higher than the excitation energy. Guided by the UCPL concept, we create the first UCPL phosphor Zn3Ga2GeO8 : 1% Cr3+, 5% Yb3+, 0.5% Er3+ by incorporating an up-converting ion pair Yb3+/Er3+ into a Zn3Ga2GeO8 : 1% Cr3+ near-infrared persistent phosphor. After being excited by a 980 nm laser, the phosphor emits long-lasting (> 24 h) near-infrared persistent emission peaking at 700 nm. The UCPL concept and the associated phosphors are expected to have important implications for several fields such as biomedical imaging.