宁桂玲

个人信息Personal Information

教授

博士生导师

硕士生导师

性别:女

毕业院校:大连理工大学

学位:博士

所在单位:化工学院

学科:化学工艺. 功能材料化学与化工. 无机化学

办公地点:西部校区化工综合楼A403

联系方式:0411-84986065

电子邮箱:ninggl@dlut.edu.cn

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Synthesis of micrometer SrAl2Si2O8 :Eu, Dy blue phosphor powders via sol- gel process

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论文类型:期刊论文

发表时间:2008-01-01

发表刊物:功能材料与器件学报

收录刊物:PKU、ISTIC、CSCD

卷号:14

期号:1

页面范围:197-200

ISSN号:1007-4252

关键字:Sol - gel method Luminescence Phosphors SrAl2Si2O8 : Eu2+,Dy3+

摘要:In this paper, we report on long- persistence white phosphor SrAl2Si2O8 :Eu2+ , Dy3+ synthe-sized by the sol - gel method. The luminescent materials prepared by the sol - gel method have many ad-vantages, such as uniform composition, high purity, fine grains and low synthesis temperature. We foundthat SrAl2Si2O8 :Eu2+ ,Dy3+ phosphor prepared by the sol -gel method can provide more luminescent in-tensity and better afterglow characteristic compared with the same phosphor prepared by solid -statemethod. Namely, the particle size and shape of phosphors should be optimized to obtain the maximumquantum efficiency through energy absorption. The mierostrueture of the phosphor consisted of regularfine grains with an average size of about 0.5. - 1 μm. Under 356 nm light excitation, the broadband emis-sion of the phosphor continues from 350 to 650 ntn and the emission peak is at about 414 nm, which canbe viewed as the typical emission of Eu2+ ascribed to the 4f→5d transitions.