期刊
NATURE PHOTONICS
卷 14, 期 12, 页码 760-+出版社
NATURE PORTFOLIO
DOI: 10.1038/s41566-020-00714-6
关键词
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资金
- National Natural Science Foundation of China [51972119, 51702101, 51472088]
- Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program [2017BT01X137]
- Young Top-notch Talents of Guangdong Pearl River Talents Program [2017GC010278]
- One-Hundred Young Talents Program of Guangdong University of Technology [220413145]
An ytterbium sublattice in an erbium-sensitized multilayer core-shell structure enables photon upconversion from lanthanide ions under 1,530 nm irradiation. Smart control of photon upconversion is a key strategy for lanthanide-based materials used in biological and photonic applications. However, this has remained a challenge for the upconversion luminescence of lanthanides under excitation in the second near-infrared (NIR II) biowindow instead of at the conventional 980 and 808 nm wavelengths. Here, we report a conceptual design for an energy-migratory ytterbium sublattice in an erbium-sensitized multilayer core-shell nanostructure that is able to achieve photon upconversion from a broad range of lanthanide ions (Yb3+, Tm3+, Ho3+, Gd3+, Eu3+ and Tb3+) under 1,530 nm irradiation. The quasi-single-band upconversion in the first near-infrared (NIR I) biowindow is also realized through fine manipulation of the introduced cross-relaxations. By establishing an interfacial energy-transfer-mediated nanostructure, we also gain a deep insight into the mechanistic features of the energy migration. These results open new opportunities in a variety of frontier applications, such as information security.
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