Huang Jinshu, Tao Lili, Wei Haopeng, Huang Haozhang, Zhang Qinyuan, Zhou Bo
State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, China.
Guangdong Provincial Key Laboratory of Information Photonics Technology, School of Materials and Energy, Guangdong University of Technology, Guangzhou, China.
Nat Commun. 2025 Mar 11;16(1):2378. doi: 10.1038/s41467-025-57622-y.
Lanthanide-based luminescent materials have shown great capabilities in addressing scientific problems encountered in diverse fields. However, achieving full-color switchable output under single-wavelength irradiation has remained a daunting challenge. Here we report a conceptual model to realize this aim by the temporal control of full upconversion evolution in a multi-layer core-shell nanostructure upon a single commercial 980-nm laser, instead of two or more excitation wavelengths as reported previously. We show that it is able to realize the red-to-green color change (from Er) under non-steady state excitation by constructing the cooperative modulation effect in the Er-Tm-Yb triple system, and single out the blue light (from Tm) by filtering out the short-decay emissions via a time-gating technique. The key role of Tm in manipulating up-transition dynamics of Er is further demonstrated. Our results present a deep insight into the photophysics of lanthanides, and help develop new generation of smart luminescent materials toward emerging photonic applications.
基于镧系元素的发光材料在解决不同领域遇到的科学问题方面展现出了强大的能力。然而，在单波长照射下实现全色可切换输出仍然是一项艰巨的挑战。在此，我们报告了一个概念模型，通过在单个商用980纳米激光作用下对多层核壳纳米结构中的全上转换演化进行时间控制来实现这一目标，而不是像之前报道的那样使用两个或更多的激发波长。我们表明，通过在铒-铥-镱三重体系中构建协同调制效应，能够在非稳态激发下实现从红色到绿色的颜色变化（来自铒），并通过时间选通技术滤除短寿命发射来分离出蓝光（来自铥）。进一步证明了铥在操控铒的向上跃迁动力学中的关键作用。我们的结果深入洞察了镧系元素的光物理性质，并有助于开发面向新兴光子应用的新一代智能发光材料。
