Manipulating energy migration in nanoparticles toward tunable photochromic upconversion

Jinshu Huang, Langping Tu, Haozhang Huang, Haopeng Wei, Qinyuan Zhang () and Bo Zhou ()
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Jinshu Huang: South China University of Technology
Langping Tu: Changchun University of Science and Technology
Haozhang Huang: South China University of Technology
Haopeng Wei: South China University of Technology
Qinyuan Zhang: South China University of Technology
Bo Zhou: South China University of Technology

Nature Communications, 2024, vol. 15, issue 1, 1-9

Abstract: Abstract Smart control of energy interactions plays a key role in manipulating upconversion dynamics and tuning emission colors for lanthanide-doped materials. However, quantifying the energy flux in particular energy migration in the representative sensitizer-activator coupled upconversion system has remained a challenge. Here we report a conceptual model to examine the energy flux in a single nanoparticle by designing an interfacial energy transfer mediated nanostructure. We show that energy migration indeed occurs simultaneously with energy transfer in a sensitizer-activator system and the competition between them can be quantified by proposing a characteristic ratio parameter. Moreover, this model is also able to realize the color-switchable photochromic upconversion by temporal control of up-transition processes. These findings offer a deep insight into the understanding of upconversion dynamics and provide a versatile approach to manipulating the energy flux in nanostructures with tunable emission colors, showing great promise in applications of logic operation and information security.

Date: 2024
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DOI: 10.1038/s41467-024-55258-y

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