Preparation and Luminescence Properties of Rod-like LaF3∶Eu3+ Nanocrystals

Chem. J. Chinese Universities

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Preparation and Luminescence Properties of Rod-like LaF₃∶Eu³⁺ Nanocrystals

LIU Gui-Xia*, SU Rui-Xiang, WANG Jin-Xian, DONG Xiang-Ting

School of Chemistry and Environmental Engineering, Changchun University of Science and Technology, Changchun 130022, China

Received:2007-07-11 Revised:1900-01-01 Online:2008-03-10 Published:2008-03-10
Contact: LIU Gui-Xia

Abstract

Abstract: Rod-like LaF₃∶Eu³⁺nanocrystals were synthesized by a simple liquid method at room temperature, and the properties were characterized. XRD patterns showed that the hexagonal phase LaF₃ crystals with a better crystallinity were obtained at room temperature, the diffraction peaks intensities increased with the increase of annealing temperature and no impurity phase was observed. TEM images showed that the LaF₃∶Eu³⁺ nanocrystals are in rod shape with the diameter of 8 nm and length to 50 nm. Photoluminescence properties indicated that the strongest emission peak of the obtained rod-like LaF₃∶Eu³⁺ nanocrystal is near 589 nm, corresponding to the ⁵D₀-⁷F₁ transition of Eu³⁺, which suggests that Eu³⁺ is located at C₂ symmetry lattice of La³⁺ in LaF₃ host, in addition, the quenching molar fraction of Eu³⁺ is 5% and the lifetime increases with the increase of annealing temperature.

Key words: LaF₃∶Eu³⁺, Nanocrystal, Luminescence material

CLC Number:

O614.33

TrendMD:

LIU Gui-Xia*, SU Rui-Xiang, WANG Jin-Xian, DONG Xiang-Ting. Preparation and Luminescence Properties of Rod-like LaF₃∶Eu³⁺ Nanocrystals[J]. Chem. J. Chinese Universities, doi: .

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Preparation and Luminescence Properties of Rod-like LaF₃∶Eu³⁺ Nanocrystals

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