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Synthesis of Core-shell Lanthanide-doped Upconversion Nanocrystals for Cellular Applications
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Dye-sensitized lanthanide-doped upconversion nanoparticles.

Xindong Wang1, Rashid R Valiev, Tymish Y Ohulchanskyy

  • 1MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering & Key Laboratory of Micro-systems and Micro-structures, Ministry of Education, Harbin Institute of Technology, 150001 Harbin, People's Republic of China. chenguanying@hit.edu.cn.

Chemical Society Reviews
|June 17, 2017
PubMed
Summary
This summary is machine-generated.

Dye-sensitized upconversion nanoparticles (UCNPs) overcome the brightness limitations of traditional UCNPs. By using organic dyes to enhance light absorption and energy transfer, these advanced UCNPs show significantly improved luminescence for various applications.

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Area of Science:

  • Nanotechnology
  • Materials Science
  • Photonics

Background:

  • Lanthanide-doped upconversion nanoparticles (UCNPs) exhibit potential in diverse fields like bioimaging and solar cells.
  • A key limitation of UCNPs is their inherently weak and narrow absorption by lanthanide ions, restricting their brightness.
  • This fundamental challenge has hindered the full realization of UCNP applications.

Purpose of the Study:

  • To review recent advancements in dye-sensitized UCNPs.
  • To explore the mechanisms of energy transfer in these systems.
  • To discuss the applications and future prospects of dye-sensitized UCNPs.

Main Methods:

  • Dye sensitization involves anchoring organic dyes to UCNP surfaces for enhanced light harvesting.
  • Energy transfer occurs via Förster and/or Dexter mechanisms from dyes to lanthanide ions.
  • This review synthesizes theoretical principles, geometric classifications, and application data.

Main Results:

  • Dye-sensitized UCNPs demonstrate significantly enhanced luminescence, up to thousands-fold brighter than conventional UCNPs.
  • This approach effectively overcomes the absorption limitations of lanthanide ions.
  • The integration of dyes enables efficient upconversion luminescence.

Conclusions:

  • Dye-sensitized UCNPs represent a breakthrough in overcoming UCNP brightness limitations.
  • These materials offer expanded opportunities in photonic and biophotonic applications.
  • Further research into opportunities and challenges will drive future development.