Full-color tuning in multi-layer core-shell nanoparticles from single-wavelength excitation

Jinshu Huang, Lili Tao, Haopeng Wei, Haozhang Huang, Qinyuan Zhang and Bo Zhou ()
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Jinshu Huang: South China University of Technology
Lili Tao: Guangdong University of Technology
Haopeng Wei: South China University of Technology
Haozhang Huang: South China University of Technology
Qinyuan Zhang: South China University of Technology
Bo Zhou: South China University of Technology

Nature Communications, 2025, vol. 16, issue 1, 1-8

Abstract: Abstract 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 Er3+) 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 Tm3+) by filtering out the short-decay emissions via a time-gating technique. The key role of Tm3+ in manipulating up-transition dynamics of Er3+ 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.

Date: 2025
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DOI: 10.1038/s41467-025-57622-y

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