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Synthesis and Luminescent Properties of Eu3+-Doped NaCaPO4 Nano-Particles Under VUV–UV Excitation

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A red emitting phosphor, Eu3+-doped NaCaPO4, has been prepared by the sol–gel method. X-ray powder diffraction (XRD) analyses confirmed the pure crystalline phase of NaCaPO4. The morphologies of the phosphor were investigated by scanning electron microscopy (SEM), which indicated that the phosphor had a good quality of surface crystallization. This phosphor had the grain sizes of around 500 nm with fairly narrow size distribution. The vacuum ultraviolet (VUV) synchrotron radiation spectroscopy technique was used to study the luminescence properties of this phosphor. The excitation spectra revealed that there is an efficient energy transfer from the phosphate host to Eu3+ ions. Upon excitation with VUV and UV radiation, the phosphor showed strong red emission around 618 nm corresponding to the forced electric dipole 5D07F2 transition of Eu3+ ions. Defects and micro-structures that related to Eu3+ ions in the phosphate host are discussed.
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Keywords: OPTICAL MATERIALS; SOL-GEL CHEMISTRY; VUV LUMINESCENCE

Document Type: Research Article

Publication date: 2010-03-01

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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