Energy transfer in Ce and Eu co-doped barium thiogallate: A photoluminescence characterization
In this work we report for the first time the fluorescence properties of Ce 3+ single-doped and Ce 3+/Eu 2+ co-doped BaGa 2S 4 crystals, studied by means of time resolved measurements. The single-doped samples fluorescence was characterized by the Ce 3+ radiative transitions from the 2D level to the...
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Published in | Materials science & engineering. B, Solid-state materials for advanced technology Vol. 146; no. 1; pp. 216 - 219 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier B.V
01.01.2008
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Subjects | |
Online Access | Get full text |
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Summary: | In this work we report for the first time the fluorescence properties of Ce
3+ single-doped and Ce
3+/Eu
2+ co-doped BaGa
2S
4 crystals, studied by means of time resolved measurements. The single-doped samples fluorescence was characterized by the Ce
3+ radiative transitions from the
2D level to the
2F
5/2 and
2F
7/2 levels with a lifetime of 18
ns, and by a radiative transition from the
E
g level to the ground state of Ce
3+ ions with a lifetime of 11
ns. The co-doped samples fluorescence was characterized by Eu
2+ radiative transition from 4f
6d state to the ground state with a lifetime of 290
ns. Ce
3+ emissions in co-doped samples are strongly quenched and a lifetime of 6
ns is observed. The reported data are discussed in the framework of energy transfer process between Ce and Eu. The rate of the energy transfer was estimated in 7.5
×
10
7
s
−1 with efficiency of 66%. |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 0921-5107 1873-4944 |
DOI: | 10.1016/j.mseb.2007.07.031 |