Site spectroscopy of Eu3+ doped- ZnS nanocrystals embedded in sodium carboxymethyl cellulose matrix

被引：11

作者：

Ahemen, I. ^{[1
]}

Meludu, O. ^{[2
]}

Dejene, F. B. ^{[2
]}

Viana, B. ^{[3
]}

机构：

[1] Univ Free State, Dept Phys, Qwaqwa Campus,Private Bag X13, ZA-9866 Phuthaditjhaba, South Africa

[2] Modibbo Adama Univ Technol Yola, Yola, Nigeria

[3] PSL Res Univ, Chim ParisTech, CNRS, Inst Rech Chim Paris, F-75005 Paris, France

来源：

OPTICAL MATERIALS | 2016年 / 61卷

关键词：

Site symmetry; Defects; ZnS; Nanocrystals; Europium; Energy transfer; SOL-GEL SYNTHESIS; LUMINESCENCE PROPERTIES; ENERGY-TRANSFER; PHOTOLUMINESCENCE PROPERTIES; THIN-FILMS; NANOPARTICLES; EUROPIUM; IONS; FLUORESCENCE; EMISSION;

D O I：

10.1016/j.optmat.2016.07.036

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The work investigates the incorporation of Eu3+ ion in ZnS crystal through spectroscopic studies. ZnS: Eu3+ nanocrystals was synthesized via the precipitation technique. Elemental composition analysis indicates a non-stoichiometric distribution between Zn and S. X-ray diffraction studies show lattice expansion demonstrating that Eu3+ ions were incorporated in the host lattice. Annealing temperature gave rise to lattice contraction relative to the as-synthesized indicating a partial expulsion of the ion from the crystal due to heat treatment. Eu3+ ions site symmetry probing from optical features show that trivalent europium were situated both at the nanocrystals surface and at the Zn2+ ion site. Weak energy transfer from host to activator ion occurred probably mainly through exchange interaction and the transfer process was defect mediated. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：82 / 91

页数：10

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