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Local Structure Engineering in Lanthanide-Doped Nanocrystals for Tunable Upconversion Emissions.

Hao Dong1, Ling-Dong Sun1, Chun-Hua Yan1,2

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Engineering the local structure of lanthanide-doped nanocrystals effectively modulates upconversion emissions. This approach offers precise control over emission properties for advanced applications in nanophotonics and biomedicine.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Photonics

Background:

  • Lanthanide-doped nanocrystals exhibit upconversion emissions, crucial for applications in nanophotonics, biomedicine, photovoltaics, and photocatalysis.
  • Tailoring upconversion emission properties is essential for optimizing these applications.
  • Local structure engineering offers a fundamental method to tune these emissions.

Purpose of the Study:

  • To provide a comprehensive overview of local structure engineering for modulating upconversion emissions in lanthanide-doped nanocrystals.
  • To elucidate the mechanisms underlying local-structure-dependent upconversion phenomena.
  • To summarize recent advancements and future perspectives in this field.

Main Methods:

  • Review of principles governing upconversion emissions.
  • Discussion of characterization techniques for local nanocrystal structures.
  • Summary of methods for local structure engineering, including host composition, external fields, and interfacial strain.

Main Results:

  • Local structure engineering effectively tunes upconversion emission intensity, selectivity, wavelength, and lifetime.
  • Mechanisms involve parity hybridization, energy level splitting of lanthanide ions, and interionic energy transfer.
  • Significant progress has been made in controlling upconversion via local structure manipulation.

Conclusions:

  • Local structure engineering is a powerful strategy for optimizing lanthanide-doped nanocrystals.
  • Further research into local structure manipulation can overcome current limitations.
  • This perspective aims to advance the understanding and application of engineered inorganic nanocrystals.