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A 'Plug and Play' Method to Create Water-dispersible Nanoassemblies Containing an Amphiphilic Polymer, Organic Dyes and Upconverting Nanoparticles

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Combating Concentration Quenching in Upconversion Nanoparticles.

Bing Chen^1,2, Feng Wang^1,2

¹Department of Materials Science and Engineering , City University of Hong Kong , 83 Tat Chee Avenue , Hong Kong SAR , China.

Accounts of Chemical Research

|October 22, 2019

Summary

This summary is machine-generated.

Heavy doping of lanthanide ions in upconversion nanoparticles (UCNPs) overcomes concentration quenching, significantly boosting luminescence intensity. This advancement enables brighter UCNPs for advanced bioimaging and photonic applications.

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Synthesis of Core-shell Lanthanide-doped Upconversion Nanocrystals for Cellular Applications

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Published on: November 10, 2017

Area of Science:

Materials Science
Nanotechnology
Photonics

Background:

Lanthanide-doped upconversion nanoparticles (UCNPs) offer unique optical properties like large anti-Stokes shift and resistance to photobleaching, making them promising for various applications.
Limited emission intensity due to concentration quenching at high dopant levels hinders the full potential of UCNPs.
Understanding and mitigating concentration quenching is crucial for developing brighter UCNPs.

Purpose of the Study:

To review recent strategies for enhancing upconversion luminescence in UCNPs through heavy doping.
To provide guidelines for controlling concentration quenching in UCNPs.
To highlight the potential of heavily doped UCNPs for advanced applications.

Main Methods:

Review of recent advances in chemical synthesis for controlled lanthanide ion doping in UCNPs.
Analysis of strategies to confine energy transfer in nanostructured hosts.
Investigation of innovative excitation schemes to alleviate concentration quenching.

Main Results:

Heavy doping of lanthanide ions can significantly boost UCNP emission intensity by overcoming concentration quenching.
Advanced synthesis techniques allow precise control over nanoparticle size, morphology, and core-shell structure.
Confining energy transfer and employing novel excitation methods effectively mitigate luminescence quenching.

Conclusions:

Heavily doped UCNPs can achieve high brightness and large anti-Stokes shifts, surpassing conventional UCNPs.
These advancements unlock new possibilities for UCNPs in demanding bioimaging and photonic applications.
Controlling concentration quenching through heavy doping is a key strategy for future UCNP development.