Journal
JOURNAL OF LUMINESCENCE
Volume 128, Issue 9, Pages 1463-1470Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jlumin.2008.01.017
Keywords
SrY2O4; Eu3+; VUV spectroscopy; energy transfer; surface loss
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We have cornpleted a study of the optical properties of SrY2O4:Eu3+ under vacuum ultraviolet (VUV) excitation. Reflectance measurements on the undoped material yield a calculated band gap of about 6.1 eV. Studies on the doped material indicate that Eu3+ occupies the Y(1) and Y(2) sites in this host. Host-to-activator energy transfer calculations indicate a preference for transfer to Eu3+ at the Y(2) site. Modeling of the transfer efficiency data leads us to estimate that about 35% of absorbed radiation is lost to the surface under excitation near the band edge. (c) 2008 Elsevier B.V. All rights reserved.
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