Title

Site-Selective Spectroscopy And Determination Of Energy-Levels In Eu3+-Doped Strontium Fluorophosphate

Authors

Authors

A. O. Wright; M. D. Seltzer; J. B. Gruber;B. H. T. Chai

Comments

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Abbreviated Journal Title

J. Appl. Phys.

Keywords

EARTH; LUMINESCENCE; APATITES; LASER; IONS; Physics, Applied

Abstract

Absorbance and site-selective fluorescence studies of Eu3+:Sr-5(PO4)(3)F (Eu:SFAP) provide a nearly complete characterization of the Eu3+ energy levels. These results are compared with calculated energies generated by lattice-sum analysis. Eu3+ is found to occupy one site predominantly, but numerous minority sites are also evident; polarization studies of absorption and fluorescence lines provide evidence for the principle site having C-s symmetry. Vibronic transitions occur in spectra as well. Interpretation of the lattice location and charge compensation mechanism for the principal site is discussed in the context of obstacles arising from spectral interpretation, high crystal fields in SFAP, low site symmetry, low J-numbers in Eu3+ energy manifolds, and lattice covalency. Eu2+ emission upon ultraviolet excitation is also demonstrated; valleys in the emission profile are attributed to intracrystal absorption by Eu3+. (C) 1995 American Institute of Physics.

Journal Title

Journal of Applied Physics

Volume

78

Issue/Number

4

Publication Date

1-1-1995

Document Type

Article

Language

English

First Page

2456

Last Page

2467

WOS Identifier

WOS:A1995RP71800042

ISSN

0021-8979

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