Luminescent properties and concentration quenching of Eu 2+ in Ba 2Ca(BO 3) 2

被引：1

作者：

Wang, Zhi-Jun ^{[1
]}

Liu, Chong ^{[2
]}

Yang, Zhi-Ping ^{[1
]}

Li, Pan-Lai ^{[1
]}

Guo, Qing-Lin ^{[1
]}

机构：

[1] College of Physics Science and Technology, Hebei University

[2] College of Graduate Studies, Hebei University

来源：

Faguang Xuebao/Chinese Journal of Luminescence | 2012年 / 33卷 / 07期

关键词：

Ba [!sub]2[!/sub]Ca(BO [!sub]3[!/sub]) [!sub]2[!/sub; Concentration quenching; Eu [!sup]2+[!/sup; Luminescence;

D O I：

10.3788/fgxb20123307.0729

中图分类号：

学科分类号：

摘要：

Ba 2Ca(BO 3) 2:Eu 2+ phosphor was synthesized by a high temperature solid-state method. CaCO 3 (A.R), BaCO 3 (A.R), H 3BO 3 (A.R) and Eu 2O 3 (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, Ba 2Ca(BO 3) 2:Eu 2+ shows an asymmetrically single green emission band with a maximum at 537 nm, which corresponds to the 4f 65d 1→4f 7 transition of Eu 2+. The emission intensity of Ba 2Ca(BO 3) 2:Eu 2+ was influenced by Eu 2+ molefraction, at first, it increases with the increase of Eu 2+ mole fraction, and reaches a maximum value at 2%Eu 2+, 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(R c) can be obtained, and are 2.64 nm and 2.11 nm, respectively. Moreover, with increasing the Eu 2+ doped content, the CIE chromaticity coordinates of the samples were slightly varied. For Ba 2Ca(BO 3) 2:2%Eu 2+, the quantum efficiency is approximately 72%.

引用

页码：729 / 735

页数：6

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