Synthesis and Spectral Properties of Eu2+/Ce3+ Doped Potassium Magnesium Fluoride Nanoparticles

Chem. J. Chinese Universities ›› 2006, Vol. 27 ›› Issue (3): 401.

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Synthesis and Spectral Properties of Eu²⁺/Ce³⁺ Doped Potassium Magnesium Fluoride Nanoparticles

ZHU Guo-Xian^1,3,YAN Jing-Hui²,MO Feng-Shan¹ ,LIAN Hong-Zhou³,SHI Chun-Shan^3*

1. School of Life Science and Chemistry,Zhanjiang Normal College,Zhanjiang 524048,China; 2. Department of
Materials and Chemical Engineering,Changchun University of Science and Technology,Changchun 130022,China;
3. Key Laboratory of Rare Earth Chemistry and Physics,Chinese Academy of Sciences,Changchun 130022,China

Received:2005-08-22 Online:2006-03-10 Published:2006-03-10

Abstract

Abstract:

Phosphors of KMgF₃∶Eu²⁺, KMgF3∶Ce³⁺and KMgF₃∶Eu²⁺,Ce³⁺nanoparticles were synthesized in cetyltrimethylammonium bromide(CTAB)/2-octanol/water microemulsion systems. X-ray diffraction(XRD) patterns was used to identify the formation of KMgF₃ phase without detectable impurity. Environment scanning electron microscopy(ESEM) images show the even size distribution of the nanoparticles with pellet morphology. Photoluminescence characteristics of the rare earth ions doped nanoparticles were investigated and compared with that of the polycrystalline products prepared by solid state reaction at a high temperature. The emission band of the Ce³⁺ could only be observed due to absorbing the exciting energy competitively between the Eu²⁺ and Ce³⁺ in co-doped system of KMgF₃ nanoparticles,while the emission peak of the Eu²⁺could only be observed due to energy transfer from Ce³⁺ to Eu²⁺appearing in the KMgF₃∶Eu²⁺,Ce³⁺polycrystalline powder. The mechanism on energr transfer from Ce³⁺ to Eu²⁺ in polycrystal and from Eu²⁺ to Ce³⁺in nanocrystal KMgF3∶Eu²⁺,Ce³⁺was discussed by means of Eu²⁺ excitation spectrum and Ce³⁺emission spectrum.

Key words: Microemulsion; Rare earth ion; KMgF₃ nanoparticles; Spectroscopy; Energy transfer

CLC Number:

O612

TrendMD:

ZHU Guo-Xian, YAN Jing-Hui, MO Feng-Shan, LIAN Hong-Zhou, SHI Chun-Shan. Synthesis and Spectral Properties of Eu²⁺/Ce³⁺ Doped Potassium Magnesium Fluoride Nanoparticles[J]. Chem. J. Chinese Universities, 2006, 27(3): 401.

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Synthesis and Spectral Properties of Eu²⁺/Ce³⁺ Doped Potassium Magnesium Fluoride Nanoparticles

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