In:
physica status solidi (a), Wiley, Vol. 209, No. 6 ( 2012-06), p. 1134-1140
Abstract:
Dy‐doped borate glasses with PbO and PbX 2 (X = F, Cl) were examined using Raman and luminescence spectroscopy. The Raman spectra show the structural changes of a glass network with B 2 O 3 /PbO ratios and presence of PbX 2 (X = F or Cl). The photoluminescence spectra measured in the visible range present two bands located at 480 and 573 nm, which correspond to 4 F 9/2 – 6 H 15/2 (blue) and 4 F 9/2 – 6 H 13/2 (yellow) transitions of Dy 3+ . Luminescence decays from the 4 F 9/2 state and yellow/blue luminescence intensity ratios (Y/B) were analyzed as a function of glass composition (B 2 O 3 /PbO) and PbX 2 (X = F, Cl) content. The branching ratios of yellow/blue luminescence increase, whereas the 4 F 9/2 lifetime of Dy 3+ ions decreases with increasing PbO concentration. An introduction of PbX 2 to the borate glass results in the increasing of 4 F 9/2 lifetime and decreasing of the yellow‐to‐blue luminescence intensity ratio. These phenomena are related to reduction of covalency between Dy 3+ and O 2− /X − ions.
Type of Medium:
Online Resource
ISSN:
1862-6300
,
1862-6319
DOI:
10.1002/pssa.201127555
Language:
English
Publisher:
Wiley
Publication Date:
2012
detail.hit.zdb_id:
1481091-8
detail.hit.zdb_id:
208850-2
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