State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, and Institute of Optical Communication Materials, South China University of Technology, Guangzhou, 510641, China.
School of Materials and Energy, Guangdong University of Technology, Guangzhou, 510006, China.
Adv Mater. 2019 Feb;31(6):e1806308. doi: 10.1002/adma.201806308. Epub 2018 Dec 13.
A novel mechanistic strategy for probing the energy migration through constructing the interfacial energy transfer (IET) in a core-shell-shell nanostructure is reported. In this design, the trilayer nanostructure is composed of a sensitizing core, a migratory interlayer, and a detective shell layer that interact with each other only by IET and the latter two shell layers are nonresponsive to the incident irradiation. This model is well applied in investigating the energy migration over the Tb, Gd, and Yb sublattices, and the results show that the Gd sublattice holds the best energy migratory performance. Moreover, the finding of energy migration over the Yb sublattice enables the 808 nm excited long-lived upconversion of Tb and Eu , which exhibits unique time-gating performance for information security. The results provide a facile and powerful nanosized model for an in-depth understanding of the fundamentals involving lanthanide interactions, which will further help excite new chances for the frontier applications of lanthanide-based luminescent materials.
报道了一种通过在核壳壳结构中构建界面能量转移（IET）来探测能量迁移的新型机制策略。在该设计中，三层纳米结构由敏化核、迁移中间层和探测壳层组成，它们仅通过 IET 相互作用，后两个壳层对入射辐射无响应。该模型很好地应用于研究 Tb、Gd 和 Yb 亚晶格上的能量迁移，结果表明 Gd 亚晶格具有最佳的能量迁移性能。此外，在 Yb 亚晶格上发现能量迁移使 808nm 激发的 Tb 和 Eu 的长寿命上转换，这为信息安全显示了独特的时间门控性能。该结果提供了一种简单而强大的纳米模型，可深入了解涉及镧系元素相互作用的基本原理，这将进一步激发基于镧系元素发光材料的前沿应用的新机会。
