Energy transfer and electron-phonon coupling properties in Gd2(WO4)3:Eu phosphor

被引:29
作者
Liu, Zhixin [1 ]
Meng, Qingyu [1 ]
Liu, Hongliang [1 ]
Yao, Chengbao [1 ]
Meng, Qingguo [1 ]
Liu, Wei [1 ]
Wang, Weibo [1 ]
机构
[1] Harbin Normal Univ, Minist Educ, Key Lab Photon & Elect Bandgap Mat, Sch Phys & Elect Engn, Harbin 150025, Peoples R China
基金
中国国家自然科学基金;
关键词
Tungstate; Eu3+; Electron-phonon coupling; Energy transfer; LUMINESCENT PROPERTIES; FLUORESCENCE PROPERTIES;
D O I
10.1016/j.optmat.2013.09.029
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In this paper, Gd-2(WO4)(3):Eu phosphors was synthesized through co-precipitation which is a simple and low-costing method. The crystal structure and morphology of the phosphors were characterized by means of XRD and field emission scanning electron microscope. The emission spectra and excitation spectra (phonon sideband spectra) of every sample were measured. The Huang-Rhys factor was derived from the phonon sideband spectra. The energy transfer type that gives rise to concentration quenching was measured, and critical energy transfer distance (R-c) was calculated. The intrinsic lifetime for D-5(0) level of Eu3+ and the phonon number generated in the self-quenching process was obtained based on Auzel's model. Finally, the energy transfer rate between Eu3+ ions was derived on the basis of the fluorescence lifetime. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码:384 / 389
页数:6
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