钙钛矿(结构)
纳米复合材料
材料科学
发光
纳米晶材料
纳米晶
光电子学
纳米颗粒
激光器
化学工程
纳米技术
光学
物理
工程类
作者
Hui Xiao,Bin Liu,Lei Qiu,Guogang Li,Shouxin Zhang,Dayu Huang,Yajie Zhao,Chunzheng Yang,Fan Jiang,Peipei Dang,Hongzhou Lian,Ziyong Cheng,Jun Lin
标识
DOI:10.1002/anie.202115136
摘要
In view of their excellent luminescence properties, nanocrystalline metal halide perovskites have diverse optoelectronic applications, including those related to anticounterfeiting. However, high-quality optical anticounterfeiting typically requires multiple encryptions relying on several optical modes to ensure information security. Herein, an efficient anticounterfeiting strategy based on dual optical encryption is realized by combining up- and downconversion luminescence in a nanocomposite with NaYF4 : Er3+ ,Yb3+ as core and a CsMnCl3 as shell. The emission color of this nanocomposite depends on the penetration depth of incident radiation and can be changed by varying the excitation source (980 nm laser or UV light) to produce different luminescent patterns. This feature allows one to effectively improve the anticounterfeiting index and fabricate professional anticounterfeiting materials.
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