Oh Jin Woo, Lee Seokyeong, Han Hyowon, Allam Omar, Choi Ji Il, Lee Hyeokjung, Jiang Wei, Jang Jihye, Kim Gwanho, Mun Seungsoo, Lee Kyuho, Kim Yeonji, Park Jong Woong, Lee Seonju, Jang Seung Soon, Park Cheolmin
Department of Materials Science and Engineering, Yonsei University, Seoul, 03722, Republic of Korea.
The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, 801 Ferst Drive, Atlanta, GA, 30332-0405, USA.
Light Sci Appl. 2023 Sep 12;12(1):226. doi: 10.1038/s41377-023-01274-4.
Optical encryption technologies based on room-temperature light-emitting materials are of considerable interest. Herein, we present three-dimensional (3D) printable dual-light-emitting materials for high-performance optical pattern encryption. These are based on fluorescent perovskite nanocrystals (NCs) embedded in metal-organic frameworks (MOFs) designed for phosphorescent host-guest interactions. Notably, perovskite-containing MOFs emit a highly efficient blue phosphorescence, and perovskite NCs embedded in the MOFs emit characteristic green or red fluorescence under ultraviolet (UV) irradiation. Such dual-light-emitting MOFs with independent fluorescence and phosphorescence emissions are employed in pochoir pattern encryption, wherein actual information with transient phosphorescence is efficiently concealed behind fake information with fluorescence under UV exposure. Moreover, a 3D cubic skeleton is developed with the dual-light-emitting MOF powder dispersed in 3D-printable polymer filaments for 3D dual-pattern encryption. This article outlines a universal principle for developing MOF-based room-temperature multi-light-emitting materials and a strategy for multidimensional information encryption with enhanced capacity and security.
基于室温发光材料的光学加密技术备受关注。在此，我们展示了用于高性能光学图案加密的三维（3D）可打印双发光材料。这些材料基于嵌入金属有机框架（MOF）中的荧光钙钛矿纳米晶体（NCs），该MOF专为磷光主客体相互作用而设计。值得注意的是，含钙钛矿的MOF发出高效的蓝色磷光，而嵌入MOF中的钙钛矿NCs在紫外线（UV）照射下发出特征性的绿色或红色荧光。这种具有独立荧光和磷光发射的双发光MOF被用于孔版图案加密，其中在UV曝光下，具有瞬态磷光的实际信息被有效地隐藏在具有荧光的虚假信息之后。此外，通过将双发光MOF粉末分散在3D可打印聚合物细丝中，开发出一种3D立方骨架用于3D双图案加密。本文概述了开发基于MOF的室温多发光材料的通用原理以及用于增强容量和安全性的多维信息加密策略。
