Photoluminescence properties of LaF3: Eu3+ nanoparticles prepared byrefluxing method
来源期刊：JOURNAL OF RARE EARTHS2009年第1期
论文作者：LIN Jun SHI Hengzhen LI Min CHANG Jiazhong WANG Chang WANG Zhenling
Key words：LaF3: Eu3+; doped; luminescence; refluxing method; nanoparticles; rare earths;
Abstract: The europium-doped LaF3 nanoparticles were prepared by refluxing method in glycerol/water mixture and characterized with X-ray diffraction(XRD), field emission scanning electron microscopy(FE-SEM), UV-vis diffuse reflectance spectrum, and photoluminescence spectra. The results of XRD indicated that the obtained LaF3: Eu3+ nanoparticles were well crystallized with a hexagonal structure. The FE-SEM image illustrated that the LaF3: Eu3+ nanoparticles were spherical with an average size around 30 nm. Under irradiation of UV light, the emission spectrum of LaF3: Eu3+ nanoparticles exhibited the characteristic line emissions arising from the 5D0→7FJ (J=1, 2, 3, 4) transitions of the Eu3+ ions, with the dominating emission centered at 590 nm. In addition, the emissions from the 5D1 level could be clearly observed due to the low phonon energies (-350 cm-1) of LaF3 matrix. The optimum doping concentration for LaF3: Eu3+ nanoparticles was determined to be 20mol.%.
LIN Jun1，SHI Hengzhen2，LI Min2，CHANG Jiazhong2，WANG Chang2，WANG Zhenling2
(1.State Key Lablratory of Application of Rare Earth Resources Changchun Institute of Applied Chinese Academy of Sciences Changchun 130022 China;
2.Analytical and Testing Center, Zhoukou Normal University, Zhoukou 466000, China)
Abstract:The europium-doped LaF3 nanoparticles were prepared by refluxing method in glycerol/water mixture and characterized with X-ray diffraction(XRD), field emission scanning electron microscopy(FE-SEM), UV-vis diffuse reflectance spectrum, and photoluminescence spectra. The results of XRD indicated that the obtained LaF3: Eu3+ nanoparticles were well crystallized with a hexagonal structure. The FE-SEM image illustrated that the LaF3: Eu3+ nanoparticles were spherical with an average size around 30 nm. Under irradiation of UV light, the emission spectrum of LaF3: Eu3+ nanoparticles exhibited the characteristic line emissions arising from the 5D0→7FJ (J=1, 2, 3, 4) transitions of the Eu3+ ions, with the dominating emission centered at 590 nm. In addition, the emissions from the 5D1 level could be clearly observed due to the low phonon energies (-350 cm-1) of LaF3 matrix. The optimum doping concentration for LaF3: Eu3+ nanoparticles was determined to be 20mol.%.
Key words:LaF3: Eu3+; doped; luminescence; refluxing method; nanoparticles; rare earths;
【全文内容正在添加中】
