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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 15 — Jul. 16, 2012
  • pp: 17119–17125

Identification of Eu oxidation states in a doped Sr5(PO4)3F phosphor by TOF-SIMS imaging

H. C. Swart, I. M. Nagpure, O. M. Ntwaeaborwa, G. L. Fisher, and J. J. Terblans  »View Author Affiliations


Optics Express, Vol. 20, Issue 15, pp. 17119-17125 (2012)
http://dx.doi.org/10.1364/OE.20.017119


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Abstract

An Eu-doped Sr5(PO4)3F phosphor with a hexagonal apatite structure was prepared by a urea assisted combustion method. There was evidence of the reduction of Eu3+ to Eu2+ based upon the photoluminescence data. This was confirmed with X-ray photoelectron spectroscopy. Normally, it is very difficult to distinguish between two oxidation states with time-of-flight secondary ion mass spectrometry (TOF-SIMS), but it is shown that the parallel detection capability of the technique allows full molecular and isotopic characterization of the matrix chemistry. The two states were detected by the EuF+ and EuF2+ species, ostensibly the Eu(II) and Eu(III) oxidation states, respectively.

© 2012 OSA

OCIS Codes
(250.5230) Optoelectronics : Photoluminescence
(300.2140) Spectroscopy : Emission
(300.6280) Spectroscopy : Spectroscopy, fluorescence and luminescence
(300.6490) Spectroscopy : Spectroscopy, surface
(300.6560) Spectroscopy : Spectroscopy, x-ray

ToC Category:
Spectroscopy

History
Original Manuscript: May 9, 2012
Revised Manuscript: June 21, 2012
Manuscript Accepted: July 4, 2012
Published: July 12, 2012

Citation
H. C. Swart, I. M. Nagpure, O. M. Ntwaeaborwa, G. L. Fisher, and J. J. Terblans, "Identification of Eu oxidation states in a doped Sr5(PO4)3F phosphor by TOF-SIMS imaging," Opt. Express 20, 17119-17125 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-15-17119


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References

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