Combinations of Superior Inorganic Phosphors for Level‐Tunable Information Hiding and Encoding
Combinations of Superior Inorganic Phosphors for Level‐Tunable Information Hiding and Encoding
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DOI：
10.1002/adom.202100281
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发表时间：
2021-05
影响因子：
9
通讯作者：
Youfusheng Wu;Wei Wu
中科院分区：
文献类型：
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作者：
Youfusheng Wu;Wei Wu
无机光致发光（PL）荧光粉（包括上转换（UC），下移（DS）和持久性（PersL）材料）具有可调谐输出，高量子产率（QYs）和优异的光稳定性，在高级信息隐藏和编码（IHE）中引起了极大的关注。这三种荧光粉由于其独特的光学特性，赋予了不同IHE水平的安全模式。对于防伪应用，研究如何提高光学性能，实现多层次防伪是非常必要的。本文总结了实现多色发射、高qy和优异光稳定性的各种关键方法。充分学习这些方法有望设计出优质的无机荧光粉。基于无机PL材料吸引人的光学特性，通过使用单一无机PL材料，UCL， DS和PersL的偶对，以及进一步结合外部刺激，逐步提高了IHE水平。这篇综述不仅加深了对高性能无机PL荧光粉设计的理解，而且还深入到高性能IHE的构建中。
Inorganic photoluminescence (PL) phosphors (including upconversion (UC), down‐shifting (DS), and persistent (PersL) materials) with tunable outputs, high quantum yields (QYs), and excellent photostability have attracted tremendous attention in advanced information hiding and encoding (IHE). The three kinds of phosphors endow security patterns in different IHE levels owing to their unique optical features. For security applications, it is very necessary to review how to boost optical performance and achieve multi‐level anti‐counterfeiting. Herein, diversely pivotal approaches on the achievement of multicolor emissions, high QYs, and excellent photostability are summarized. Full learning of these methods is promising to design superior inorganic phosphors. Based on the appealing optical properties of inorganic PL materials, a progressively improved IHE level is revealed by using unitary inorganic PL material, the couples of UCL, DS, and PersL, and further combinations together with external stimuli. This review not only deepens an understanding of designing high‐performance inorganic PL phosphors, but also gets inside into the construction of high‐performance IHE.