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Energy Transfer Mechanism Dominated by the Doping Location of Activators in Rare-Earth Upconversion Nanoparticles

Energy Transfer Mechanism Dominated by the Doping Location of Activators in Rare-Earth Upconversion Nanoparticles

Liyuan Sun, Luoyuan Li, Rongyao Gao, Keyun Tang, Limin Fu, Xi-Cheng Ai, Jian-Ping Zhang

Phys Chem Chem Phys. 2018 Jun 27;20(25):17141-17147.

PMID: 29897366

Abstract:

Research on the energy transfer mechanism of rare-earth-doped upconversion nanoparticles (UCNPs) has been an important area due to the increasing demand for tuning multicolor emission and enhancing the upconversion efficiency; however, because of large energy mismatch, many lanthanide activators, such as Eu3+, cannot realize highly efficient near infrared-to-visible upconversion by simple codoping of Yb3+. Therefore, introduction of other ions to assist the energy transfer process is required. Herein, we prepared core-shell nanoparticles with different doping locations to investigate the upconversion energy transfer mechanism. The upconversion luminescence (UCL) of core-shell nanoparticles was investigated by steady-state luminescence and time-resolved luminescence spectra. The UCL behaviors in these different multi-activator core-shell nanoparticles were observed. The results revealed different energy transfer channels influenced by the doping location of activators. This study may open up new avenues of structure design for fine-tuning of multicolor UCL for specific applications.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
LS767103	Rare earth doped upconversion nanoparticles			Price

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