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Updated: Dec 27, 2025

Triplet Fusion Upconversion Nanocapsule Synthesis

Triplet Fusion Upconversion Nanocapsule Synthesis

Published on: September 7, 2022

Enhancing multiphoton upconversion through interfacial energy transfer in multilayered nanoparticles.

Bin Zhou¹, Bing Tang¹, Chuang Zhang²

¹State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, 430074, Wuhan, China.

Nature Communications

|March 6, 2020

Summary

Researchers developed a novel multilayered nanoparticle structure to boost photon upconversion efficiency. This design overcomes concentration quenching, enhancing multiphoton emission for advanced applications like deep-tissue biophotonics.

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

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

Published on: November 10, 2017

Area of Science:

Materials Science
Nanotechnology
Photonics

Background:

Lanthanide-doped upconversion nanoparticles (UCNPs) are crucial for applications like deep-tissue biophotonics.
However, their efficiency, especially for multiphoton emission, is hindered by concentration quenching.

Purpose of the Study:

To design and investigate a novel multilayered core-shell-shell UCNP structure.
To enhance multiphoton emission by spatially separating activators and sensitizers and suppressing concentration quenching.

Main Methods:

Fabrication of a NaYF4 core-shell-shell nanostructure with spatially separated Er3+ activators and Yb3+ sensitizers.
Analysis of structural and temperature-dependent multiphoton upconversion luminescence.
Quantum yield measurements.

Main Results:

A 100-fold enhancement in multiphoton emission from Er3+ was achieved compared to conventional core-shell UCNPs.
Efficient excitation energy transfer at the core-shell interface was observed.
Suppression of concentration quenching led to a high quantum yield of up to 6.34%.

Conclusions:

The multilayered core-shell-shell structure effectively overcomes the limitations of concentration quenching in UCNPs.
This design enables significantly enhanced multiphoton emission, paving the way for advanced UCNP applications.
The findings offer a versatile strategy for designing next-generation upconverting nanoparticles.