Relationship between structural characteristics and photoluminescent properties of (La1-xEux)2M2O7 (M = Zr, Hf, Sn) pyrochlores

被引：39

作者：

Hirayama, Masaaki ^{[1
]}

Sonoyama, Noriyuki ^{[2
]}

Yamada, Atsuo ^{[1
]}

Kanno, Ryoji ^{[1
]}

机构：

[1] Tokyo Inst Technol, Dept Elect Chem, Interdisciplinary Grad Sch Sci & Engn, Midori Ku, Yokohama, Kanagawa 2268502, Japan

[2] Nagoya Inst Technol, Grad Sch Engn Environm Technol & Urban Planning, Showa Ku, Nagoya, Aichi 4668555, Japan

来源：

JOURNAL OF LUMINESCENCE | 2008年 / 128卷 / 11期

关键词：

pyrochlore; Eu3+; luminescence; rierveld analysis; crystallinity;

D O I：

10.1016/j.jlumin.2008.05.005

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Eu-doped pyrochlores, La2M2O7 (M = Zr, Hf, Sn), were synthesized by solid-state reaction at a temperature range of 1473 and 1673 K, and their structures and optical properties were characterized by X-ray Rietveld analysis, field emission scanning electron microscope (FE-SEM), and photoluminescent spectroscopy. The Rietveld analysis indicated that the distortion of the (EuO8)(n-) scalenohedra increased with decreasing ionic radii of the M4+ ion, and the crystallinity increased with the sintering temperature. The splitting width of D-5(0)-F-7(1) transition of Eu3+ ions increased with the distortion of the (EuO8)(n)-scalenohedra. The luminescent intensity ratio of magnetic dipole transitions to electronic dipole transitions decreased with the crystallinity, and the chromaticity changed from deep-red to orange-red. The relationship between the chromaticity of phosphors and the crystallinity was clarified, and the control of crystallinity is an important factor that provides phosphors with required chromaticity. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：1819 / 1825

页数：7

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