Preparation and Luminescent Properties of YAl3(BO3)4:Eu3+
The red phosphor single phase yttrium aluminoborate doped with Eu3+ was prepared by the nitrate salts thermal decomposition method at relatively lower temperature than a conventional solid sate reaction method. The pure phase YAl3(BO3)4 have been obtained when the calcination temperature is up to 900℃ . The phosphor was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and luminescence spectra. The results show that YAl3 (BO3)4.Eu3+ belongs rhombohedral system, with space group R32. The Y ions are replaced by Eu ions in view of their similar sizes and valence state. The Eu3+ ions are non-centrosymmetric sites in YAl3(BO3)4 : Eu3+ . In emission spectra, the strongest peak at 618nm correlating to red emission under 394nm monitoring wavelength is due to the forced electric dipole transition 5D0→7F2 of Eu3+ ions. The phosphor YAl3(BO3)4:Eu3+ have excellent color purity. The crys-tallinity and luminescent intensity is enhanced as the increase of the calcination time and calcination temperature. The luminescent properties of the samples with 10 mol％ doping concentration of Eu is optimal. The quenching concentration is more than solid state reaction (from 8mol％ to 10mol％ ). The particles are uniform multilayered tabular crystal and distributed within a narrow size range.
Red phosphor Rare earth Thermal decomposition Yttrium aluminoborate Luminescence
Jia Linyan Shao Zhongbao
Mudanjiang Normal University, No.11, Lane 3, Wenhua Road, Heping District, Shenyang, 110004 China College of Sciences Northeastern University, China No.11, Lane 3, Wenhua Road, Heping District, Shen
国际会议
沈阳
英文
179-182
2009-08-27（万方平台首次上网日期，不代表论文的发表时间）