Dependence of Eu3+ luminescence dynamics on the structure of the combustion synthesized Sr5(PO4)3F host

被引：29

作者：

Nagpure, I. M. ^{[1
,2
]}

Dhoble, S. J. ^{[2
]}

Mohapatra, Manoj ^{[3
]}

Kumar, Vinay ^{[1
]}

Pitale, Shreyas S. ^{[1
]}

Ntwaeaborwa, O. M. ^{[1
]}

Godbole, S. V. ^{[3
]}

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

机构：

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

[2] RTM Nagpur Univ, Dept Phys, Nagpur 440033, Maharashtra, India

[3] Bhabha Atom Res Ctr, Div Radiochem, Bombay 400085, Maharashtra, India

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2011年 / 509卷 / 05期

基金：

新加坡国家研究基金会;

关键词：

Phosphors; XRD; EDS; SEM; Photoluminescence; TRES; SR; PHOTOLUMINESCENCE; SPECTROSCOPY; PROBE; EU2+;

D O I：

10.1016/j.jallcom.2010.11.086

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Europium (Eu3+) activated strontium fluoropatite (Sr-5(PO4)(3)F) phosphor powders were prepared by a combustion method. The structure and luminescence properties of this potential red emitting phosphor are explored. In order to improve the luminescent properties the obtained powders were also annealed at 900 and 1200 degrees C. The X-ray diffraction (XRD) data indicated that the major crystalline phases from the as-prepared or annealed powder samples were identical to the hexagonal apatite structure of Sr-5(PO4)(3)F. The Eu3+ occupied two different sites (C-s (S1) and C-3 (S2)) of Sr in the Sr-5(PO4)(3)F host, giving rise to two emission sites, as inferred from the time resolved luminescence spectroscopy (TRES) data. The photoluminescence (PL) intensity of Eu3+ from the as prepared sample was found to be more intense than the annealed samples. In addition from the PL data it was evident that a reduction of the Eu3+ to Eu2+ occurred. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：2544 / 2551

页数：8

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