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Tailoring Upconversion Emissions through Core-Shell and Local Structure Engineering.

Jin-Wen Zhang1, Yusen Liang1, Xuan-Ying Zhang1

  • 1Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, PKU-HKU Joint Laboratory in Rare Earth Materials and Bioinorganic Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.

Accounts of Chemical Research
|March 30, 2026
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Summary
This summary is machine-generated.

Lanthanide-doped upconversion nanoparticles (UCNPs) can be precisely controlled using core-shell architectures and local structure engineering. These strategies enhance emission efficiency, color tuning, and lifetime for advanced optical applications.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Photonics

Background:

  • Lanthanide-doped upconversion nanoparticles (UCNPs) exhibit unique anti-Stokes emissions via multiphoton absorption.
  • Intrinsic UCNP emissions often lack the efficiency, multicolor output, and tunable lifetime required for diverse applications.

Purpose of the Study:

  • To summarize recent advances in tailoring UCNP emissions through core-shell architecture and local structure engineering.
  • To provide a blueprint for precise luminescence control in UCNPs for multidisciplinary applications.

Main Methods:

  • Constructing core-shell architectures to spatially separate lanthanide species and control energy transfer pathways.
  • Engineering the local structure of lanthanide ions by adjusting composition, external fields, and interfacial strain.
  • Analyzing energy transfer mechanisms and synthetic methodologies for UCNP fabrication.

Main Results:

  • Core-shell designs enable fine control over upconversion emissions, enhance luminescence, and allow for excitation orthogonalization.
  • Local structure modulation influences 4f-4f transitions, leading to tailored emission intensity, selectivity, and lifetime.
  • Combined strategies offer multidimensional control over UCNP emission characteristics.

Conclusions:

  • Core-shell architecture and local structure engineering are effective and complementary strategies for precise UCNP luminescence modulation.
  • These engineered UCNPs show significant potential for diverse optical and multidisciplinary applications requiring tailored emission properties.