Confining Excitation Energy in Er3+-Sensitized Upconversion Nanocrystals through Tm3+-Mediated Transient Energy Trapping

Qiushui Chen; Xiaoji Xie; Bolong Huang; Liangliang Liang; Sanyang Han; Zhigao Yi; Yu Wang; Ying Li; Dianyuan Fan; Ling Huang; Xiaogang Liu

doi:10.1002/anie.201703012

Confining Excitation Energy in Er³⁺-Sensitized Upconversion Nanocrystals through Tm³⁺-Mediated Transient Energy Trapping

Qiushui Chen, Xiaoji Xie, Bolong Huang, Liangliang Liang, Sanyang Han, Zhigao Yi, Yu Wang, Ying Li, Dianyuan Fan, Ling Huang, Xiaogang Liu

Research output: Journal article publication › Journal article › Academic research › peer-review

291 Citations (Scopus)

Abstract

KGaA, Weinheim A new class of lanthanide-doped upconversion nanoparticles are presented that are without Yb3+or Nd3+sensitizers in the host lattice. In erbium-enriched core–shell NaErF4:Tm (0.5 mol %)@NaYF4nanoparticles, a high degree of energy migration between Er3+ions occurs to suppress the effect of concentration quenching upon surface coating. Unlike the conventional Yb3+-Er3+system, the Er3+ion can serve as both the sensitizer and activator to enable an effective upconversion process. Importantly, an appropriate doping of Tm3+has been demonstrated to further enhance upconversion luminescence through energy trapping. This endows the resultant nanoparticles with bright red (about 700-fold enhancement) and near-infrared luminescence that is achievable under multiple excitation wavelengths. This is a fundamental new pathway to mitigate the concentration quenching effect, thus offering a convenient method for red-emitting upconversion nanoprobes for biological applications.

Original language	English
Pages (from-to)	7605-7609
Number of pages	5
Journal	Angewandte Chemie - International Edition
Volume	56
Issue number	26
DOIs	https://doi.org/10.1002/anie.201703012
Publication status	Published - 1 Jan 2017

Keywords

energy migration
Er sensitizers 3+
optical imaging
transient energy trapping
upconversion nanocrystals

ASJC Scopus subject areas

Catalysis
General Chemistry

More information

10.1002/anie.201703012

http://hdl.handle.net/10397/101594

Cite this

@article{460d9d0822a8421b80f1fe2393598078,

title = "Confining Excitation Energy in Er3+-Sensitized Upconversion Nanocrystals through Tm3+-Mediated Transient Energy Trapping",

abstract = "KGaA, Weinheim A new class of lanthanide-doped upconversion nanoparticles are presented that are without Yb3+or Nd3+sensitizers in the host lattice. In erbium-enriched core–shell NaErF4:Tm (0.5 mol %)@NaYF4nanoparticles, a high degree of energy migration between Er3+ions occurs to suppress the effect of concentration quenching upon surface coating. Unlike the conventional Yb3+-Er3+system, the Er3+ion can serve as both the sensitizer and activator to enable an effective upconversion process. Importantly, an appropriate doping of Tm3+has been demonstrated to further enhance upconversion luminescence through energy trapping. This endows the resultant nanoparticles with bright red (about 700-fold enhancement) and near-infrared luminescence that is achievable under multiple excitation wavelengths. This is a fundamental new pathway to mitigate the concentration quenching effect, thus offering a convenient method for red-emitting upconversion nanoprobes for biological applications.",

keywords = "energy migration, Er sensitizers 3+, optical imaging, transient energy trapping, upconversion nanocrystals",

author = "Qiushui Chen and Xiaoji Xie and Bolong Huang and Liangliang Liang and Sanyang Han and Zhigao Yi and Yu Wang and Ying Li and Dianyuan Fan and Ling Huang and Xiaogang Liu",

year = "2017",

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AU - Chen, Qiushui

AU - Xie, Xiaoji

AU - Huang, Bolong

AU - Liang, Liangliang

AU - Han, Sanyang

AU - Yi, Zhigao

AU - Wang, Yu

AU - Li, Ying

AU - Fan, Dianyuan

AU - Huang, Ling

AU - Liu, Xiaogang

PY - 2017/1/1

Y1 - 2017/1/1

N2 - KGaA, Weinheim A new class of lanthanide-doped upconversion nanoparticles are presented that are without Yb3+or Nd3+sensitizers in the host lattice. In erbium-enriched core–shell NaErF4:Tm (0.5 mol %)@NaYF4nanoparticles, a high degree of energy migration between Er3+ions occurs to suppress the effect of concentration quenching upon surface coating. Unlike the conventional Yb3+-Er3+system, the Er3+ion can serve as both the sensitizer and activator to enable an effective upconversion process. Importantly, an appropriate doping of Tm3+has been demonstrated to further enhance upconversion luminescence through energy trapping. This endows the resultant nanoparticles with bright red (about 700-fold enhancement) and near-infrared luminescence that is achievable under multiple excitation wavelengths. This is a fundamental new pathway to mitigate the concentration quenching effect, thus offering a convenient method for red-emitting upconversion nanoprobes for biological applications.

AB - KGaA, Weinheim A new class of lanthanide-doped upconversion nanoparticles are presented that are without Yb3+or Nd3+sensitizers in the host lattice. In erbium-enriched core–shell NaErF4:Tm (0.5 mol %)@NaYF4nanoparticles, a high degree of energy migration between Er3+ions occurs to suppress the effect of concentration quenching upon surface coating. Unlike the conventional Yb3+-Er3+system, the Er3+ion can serve as both the sensitizer and activator to enable an effective upconversion process. Importantly, an appropriate doping of Tm3+has been demonstrated to further enhance upconversion luminescence through energy trapping. This endows the resultant nanoparticles with bright red (about 700-fold enhancement) and near-infrared luminescence that is achievable under multiple excitation wavelengths. This is a fundamental new pathway to mitigate the concentration quenching effect, thus offering a convenient method for red-emitting upconversion nanoprobes for biological applications.

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