发光学报2012，Vol.33Issue(7)：729-735,7.DOI:10.3788/fgxb20123307.0729
Eu2+在Ba2Ca(BO3)2中的发光特性及浓度猝灭
Luminescent Properties and Concentration Quenching of Eu2 + in Ba2Ca( BO3 ) 2
摘要
Abstract
Ba2 Ca(BO3)2∶Eu2+ phosphor was synthesized by a high temperature solid-state method.CaCO3 (A.R),BaCO3(A.R),H3BO3(A.R) and Eu2O3(99.99％) were used as raw materials.Its crystal structure,luminescent characteristics and Commission International de l'Eclairage (CIE) chromaticity coordinates values were measured.Under the ultraviolet to visible light irradiation,Ba2 Ca( BO3 ) 2 ∶ Eu2 + shows an asymmetrically single green emission band with a maximum at 537 nm,which corresponds to the 4f65d1→4f7 transition of Eu2+.The emission intensity of Ba2Ca(BO3)2∶ Eu2+ was influenced by Eu2+ molefraction,at first,it increases with the increase of Eu2+ mole fraction,and reaches a maximum value at 2％Eu2+,then decreases with further increasing its concentration because of the concentration quenching effect.And the concentration quenching mechanism is verified to be dipole-dipole interaction.According to the crystal structure data and the experimental spectral data,the critical distances( Rc ) can be obtained,and are 2.64 nm and 2.11 nm,respectively.Moreover,with increasing the Eu2+ doped content,the CIE chromaticity coordinates of the samples were slightly varied.For Ba2 Ca( BO3 ) 2∶2％ Eu2 +,the quantum efficiency is approximately 72％.关键词
发光/Eu2+/Ba2Ca(BO3)2/浓度猝灭Key words
luminescence/Eu2+/Ba2Ca(BO3)2 /concentration quenching分类
信息技术与安全科学引用本文复制引用
王志军,刘冲,杨志平,李盼来,郭庆林..Eu2+在Ba2Ca(BO3)2中的发光特性及浓度猝灭[J].发光学报,2012,33(7):729-735,7.基金项目
国家自然科学基金(50902042) （50902042）
河北省自然科学基金(E2009000209 （）
E2010000283) （）
河北省教育厅基金(2009313) （2009313）
发光与光信息技术教育部重点实验室研究基金(2010LOH2)资助项目 （2010LOH2）
