Concentration quenching of Eu2+ doped Ca2BO3Cl

被引：12

作者：

Ahmed, H. A. A. Seed ^{[1
,2
]}

Swart, H. C. ^{[1
]}

Bergman, Peber ^{[3
]}

Kroon, R. E. ^{[1
]}

机构：

[1] Univ Orange Free State, Dept Phys, ZA-9300 Bloemfontein, South Africa

[2] Univ Khartoum, Dept Phys, Khartoum, Sudan

[3] Linkoping Univ, Dept Phys Chem & Biol, Linkoping, Sweden

来源：

MATERIALS RESEARCH BULLETIN | 2016年 / 75卷

基金：

新加坡国家研究基金会;

关键词：

Optical materials; X-ray diffraction; Luminescence; Optical properties; Phosphors; LIGHT-EMITTING-DIODES; ENERGY-TRANSFER; LUMINESCENCE; PHOSPHOR;

D O I：

10.1016/j.materresbull.2015.11.024

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

With the aim of determining the concentration quenching mechanism of Eu2+ doped Ca2BO3Cl, a series of phosphors with a varied Eu2+ concentration (Ca2-xBO3Cl:xEu(2+)) was synthesized by the solid state reaction method. The phase structure was determined by X-ray diffraction. Photoluminescence (PL) measurements showed broad excitation and emission signatures of the allowed f-d transition of Eu2+ ions. The PL emission intensity was found to be increased by increasing the concentration of Eu2+ ions up to x=0.03 and then decreased as a result of the concentration quenching effect. The lifetime of the emission from the Eu2+ ions was measured and the decrease in the lifetime with increasing Eu2+ concentration confirmed that non-radiative energy transfer occurred between Eu2+ ions. From the luminescence data, the value of the critical transfer distance was calculated as 1.5 nm and the corresponding concentration quenching mechanism was verified to be a dipole-dipole interaction. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：47 / 50

页数：4

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