Synthesis of monodisperse hexagonal NaYF4:Yb, Ln (Ln = Er, Ho and Tm) upconversion nanocrystals in TOPO

Jingning Shan; Xiao Qin; Nan Yao; Yiguang Ju

doi:10.1088/0957-4484/18/44/445607

Synthesis of monodisperse hexagonal NaYF₄:Yb, Ln (Ln = Er, Ho and Tm) upconversion nanocrystals in TOPO

Jingning Shan, Xiao Qin, Nan Yao, Yiguang Ju

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124 Scopus citations

Abstract

NaYF₄ doped with Yb, Ln (Ln = Er, Ho and Tm) upconversion nanocrystals (UP-NCs) were synthesized in trioctylphosphine oxide (TOPO) solvent via a thermolysis method. It was found that the energy barrier of the phase transition from cubic (α) to hexagonal (β) was significantly reduced in TOPO, and the β-phase NCs were obtained in a broad temperature window from 330 to 370°C. The as-synthesized NCs had controllable sizes in the range 5-20 nm with narrow size distribution, and presented highly efficient UP fluorescence.

Original language	English (US)
Article number	445607
Journal	Nanotechnology
Volume	18
Issue number	44
DOIs	https://doi.org/10.1088/0957-4484/18/44/445607
State	Published - Nov 7 2007

All Science Journal Classification (ASJC) codes

Bioengineering
General Chemistry
General Materials Science
Mechanics of Materials
Mechanical Engineering
Electrical and Electronic Engineering

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abstract = "NaYF4 doped with Yb, Ln (Ln = Er, Ho and Tm) upconversion nanocrystals (UP-NCs) were synthesized in trioctylphosphine oxide (TOPO) solvent via a thermolysis method. It was found that the energy barrier of the phase transition from cubic (α) to hexagonal (β) was significantly reduced in TOPO, and the β-phase NCs were obtained in a broad temperature window from 330 to 370°C. The as-synthesized NCs had controllable sizes in the range 5-20 nm with narrow size distribution, and presented highly efficient UP fluorescence.",

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T1 - Synthesis of monodisperse hexagonal NaYF4:Yb, Ln (Ln = Er, Ho and Tm) upconversion nanocrystals in TOPO

AU - Shan, Jingning

AU - Qin, Xiao

AU - Yao, Nan

AU - Ju, Yiguang

PY - 2007/11/7

Y1 - 2007/11/7

N2 - NaYF4 doped with Yb, Ln (Ln = Er, Ho and Tm) upconversion nanocrystals (UP-NCs) were synthesized in trioctylphosphine oxide (TOPO) solvent via a thermolysis method. It was found that the energy barrier of the phase transition from cubic (α) to hexagonal (β) was significantly reduced in TOPO, and the β-phase NCs were obtained in a broad temperature window from 330 to 370°C. The as-synthesized NCs had controllable sizes in the range 5-20 nm with narrow size distribution, and presented highly efficient UP fluorescence.

AB - NaYF4 doped with Yb, Ln (Ln = Er, Ho and Tm) upconversion nanocrystals (UP-NCs) were synthesized in trioctylphosphine oxide (TOPO) solvent via a thermolysis method. It was found that the energy barrier of the phase transition from cubic (α) to hexagonal (β) was significantly reduced in TOPO, and the β-phase NCs were obtained in a broad temperature window from 330 to 370°C. The as-synthesized NCs had controllable sizes in the range 5-20 nm with narrow size distribution, and presented highly efficient UP fluorescence.

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Synthesis of monodisperse hexagonal NaYF₄:Yb, Ln (Ln = Er, Ho and Tm) upconversion nanocrystals in TOPO

Abstract

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