Synthesis and characterization of needle-like BaAl_2O_4:Eu,Dy phosphor via hydrothermal-homogeneous precipitation method  

作　　者：张静娴 肖琴 刘应亮 

机构地区：[1]Department of Chemistry,Jinan Universit

出　　处：《Journal of Rare Earths》2013年第4期342-346,共5页稀土学报（英文版）

基　　金：supported by National Natural Science Foundations of China (50872045,21071063)

摘　　要：A needle-like Eu2＋ and Dy3＋ co-doped BaAI204 long-lasting phosphor was synthesized via a hydrothermal-homogeneous pre- cipitation method assisted by cetyl trimethyl ammonium bromide （CTAB） as a template. The crystal structure, morphology and opti- cal properties of the composites were characterized. XRD results showed that the single-phase BaA1204 was formed at 900 ℃ in an active carbon atmosphere, which was much lower than that prepared by traditional solid-state reaction method. Scanning electron mi- croscopy （SEM） and transmission electron microscopy （TEM） observation revealed that the precursor had well-dispersed distribution and showed needle-like morphology with the average diameter of about 100 nm and the length up to 1 μm. The final product, BaAI2Oa：Eu〉,Dy3＋ phosphor, inherited the needle-like shape from precursor via adding the surfactant CTAB. After irradiation by ul- traviolet radiation with 355 nm for 5 rain, the phosphors emitted bluish green color long-lasting phosphorescence corresponding to the typical emission of Eu2＋ ion. Both the photoluminescence spectra and luminance decay revealed that the phosphor had efficient lumi- nescent and long-lasting properties.A needle-like Eu2＋ and Dy3＋ co-doped BaAI204 long-lasting phosphor was synthesized via a hydrothermal-homogeneous pre- cipitation method assisted by cetyl trimethyl ammonium bromide （CTAB） as a template. The crystal structure, morphology and opti- cal properties of the composites were characterized. XRD results showed that the single-phase BaA1204 was formed at 900 ℃ in an active carbon atmosphere, which was much lower than that prepared by traditional solid-state reaction method. Scanning electron mi- croscopy （SEM） and transmission electron microscopy （TEM） observation revealed that the precursor had well-dispersed distribution and showed needle-like morphology with the average diameter of about 100 nm and the length up to 1 μm. The final product, BaAI2Oa：Eu〉,Dy3＋ phosphor, inherited the needle-like shape from precursor via adding the surfactant CTAB. After irradiation by ul- traviolet radiation with 355 nm for 5 rain, the phosphors emitted bluish green color long-lasting phosphorescence corresponding to the typical emission of Eu2＋ ion. Both the photoluminescence spectra and luminance decay revealed that the phosphor had efficient lumi- nescent and long-lasting properties.

关 键 词：long-lasting phosphor BaAI204：Eu2＋ Dy3＋ hydrothermal-homogeneous precipitation process luminescence rare earths 

分 类 号：O611.4[理学—无机化学]