核壳上转换发光材料研究进展

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摘  要：核壳上转换发光材料是一种新型复合材料，具有良好的物理化学性质。该文归纳核壳上转换发光材料的种类、合成方法、表征手段；核壳结构可以有效提高上转换发光效率，还能调控发光颜色和寿命；核壳上转换发光材料应用范围广泛，并对其在海关行李监管领域的应用进行展望。

关键词：核壳；上转换；发光材料；行李监管；隐蔽标识

中图分类号：F406.5      文献标志码：A          文章编号：2095-2945（2023）23-0001-06

Abstract： Core-shell upconversion luminescent material is a new type of composite material with good physical and chemical properties. In this paper， the types， synthesis methods and characterization methods of core-shell upconversion luminescent materials are summarized. Core-shell structure can not only effectively enhance the upconversion luminous efficiency， but also control the luminous color and lifetime. Core-shell UCNPs are widely used and the application in the field of customs luggage supervision is prospected.

Keywords： core-shell; upconversion; luminescent materials; baggage supervision; Covert mark

稀土上转换发光材料（Upconversion Nanoparticles，UCNPs）具有低毒性、高化学稳定性等优点；但其存在发光效率较低的缺点。（剩余7667字）