Luminescence properties of BaMg 2Si 2O 7:Eu 2+,Mn 2
The photoluminescence properties of monoclinic BaMg 2Si 2O 7:Eu 2+,Mn 2+ were studied for red emitting persistent luminescence application. With UV excitation at 300 nm, wide band emission of Eu 2+ resulting from the 4f 65d 1 → 4f 7 transition was observed at 400 nm. The emission of Mn 2+ due to the...
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Published in | Journal of alloys and compounds Vol. 451; no. 1; pp. 229 - 231 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier B.V
2008
|
Subjects | |
Online Access | Get full text |
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Summary: | The photoluminescence properties of monoclinic BaMg
2Si
2O
7:Eu
2+,Mn
2+ were studied for red emitting persistent luminescence application. With UV excitation at 300
nm, wide band emission of Eu
2+ resulting from the 4f
65d
1
→
4f
7 transition was observed at 400
nm. The emission of Mn
2+ due to the
4T
1(
4G)
→
6A
1(
6S) transition moved from 625 to 670
nm with increasing Mn
2+ content because of the appearance of Mn
2+–Mn
2+ pairs. Both emissions were observed with 300
nm excitation. The decay time measurements suggest high energy transfer probability from Eu
2+ to Mn
2+. The strongest red emission was obtained with 5 and 20
mol% doping of Eu
2+ and Mn
2+, respectively. The decay time of the Mn
2+ emission drastically decreased with higher Mn
2+ concentrations. The Eu
2+ and Mn
2+ co-doped materials showed only short and weak persistent luminescence. |
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ISSN: | 0925-8388 1873-4669 |
DOI: | 10.1016/j.jallcom.2007.04.169 |