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

I. M. Nagpure; S. J. Dhoble; Manoj Mohapatra; Vinay Kumar; Shreyas S. Pitale; O. M. Ntwaeaborwa; S. V. Godbole; H. C. Swart

doi:10.1016/j.jallcom.2010.11.086

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

I. M. Nagpure, S. J. Dhoble, Manoj Mohapatra, Vinay Kumar, Shreyas S. Pitale, O. M. Ntwaeaborwa, S. V. Godbole, H. C. Swart

Research output: Contribution to journal › Article › peer-review

33 Citations (Scopus)

Abstract

Europium (Eu³⁺) activated strontium fluoropatite (Sr ₅(PO₄)₃F) 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 °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 Sr₅(PO₄)₃F. The Eu ³⁺ occupied two different sites (C_s (S1) and C₃ (S2)) of Sr in the Sr₅(PO₄)₃F host, giving rise to two emission sites, as inferred from the time resolved luminescence spectroscopy (TRES) data. The photoluminescence (PL) intensity of Eu ³⁺ 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.

Original language	English
Pages (from-to)	2544-2551
Number of pages	8
Journal	Journal of Alloys and Compounds
Volume	509
Issue number	5
DOIs	https://doi.org/10.1016/j.jallcom.2010.11.086
Publication status	Published - 3 Feb 2011
Externally published	Yes

Keywords

EDS
Phosphors
Photoluminescence
SEM
TRES
XRD

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.1016/j.jallcom.2010.11.086

Cite this

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

abstract = "Europium (Eu3+) activated strontium fluoropatite (Sr 5(PO4)3F) 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 °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 Sr5(PO4)3F. The Eu 3+ occupied two different sites (Cs (S1) and C3 (S2)) of Sr in the Sr5(PO4)3F host, giving rise to two emission sites, as inferred from the time resolved luminescence spectroscopy (TRES) data. The photoluminescence (PL) intensity of Eu 3+ 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.",

keywords = "EDS, Phosphors, Photoluminescence, SEM, TRES, XRD",

author = "Nagpure, {I. M.} and Dhoble, {S. J.} and Manoj Mohapatra and Vinay Kumar and Pitale, {Shreyas S.} and Ntwaeaborwa, {O. M.} and Godbole, {S. V.} and Swart, {H. C.}",

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AU - Nagpure, I. M.

AU - Dhoble, S. J.

AU - Mohapatra, Manoj

AU - Kumar, Vinay

AU - Pitale, Shreyas S.

AU - Ntwaeaborwa, O. M.

AU - Godbole, S. V.

AU - Swart, H. C.

PY - 2011/2/3

Y1 - 2011/2/3

N2 - Europium (Eu3+) activated strontium fluoropatite (Sr 5(PO4)3F) 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 °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 Sr5(PO4)3F. The Eu 3+ occupied two different sites (Cs (S1) and C3 (S2)) of Sr in the Sr5(PO4)3F host, giving rise to two emission sites, as inferred from the time resolved luminescence spectroscopy (TRES) data. The photoluminescence (PL) intensity of Eu 3+ 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.

AB - Europium (Eu3+) activated strontium fluoropatite (Sr 5(PO4)3F) 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 °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 Sr5(PO4)3F. The Eu 3+ occupied two different sites (Cs (S1) and C3 (S2)) of Sr in the Sr5(PO4)3F host, giving rise to two emission sites, as inferred from the time resolved luminescence spectroscopy (TRES) data. The photoluminescence (PL) intensity of Eu 3+ 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.

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KW - XRD

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