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VUV-UV-vis photoluminescence, X-ray radioluminescence and energy transfer dynamics of Ce and Eu in SrMgSiO
Ce 3+ and Eu 2+ doped and Ce 3+ -Eu 2+ co-doped Sr 2 MgSi 2 O 7 phosphors are prepared via a high-temperature solid-state reaction technique. The synchrotron radiation vacuum ultraviolet-ultraviolet (VUV-UV) excitation and ultraviolet-visible (UV-vis) emission spectra of diluted Ce 3+ and Eu 2+ dope...
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| Published in: | Dalton transactions : an international journal of inorganic chemistry 2022-11, Vol.51 (46), p.1789-17819 |
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| Main Authors: | , , , , , , |
| Format: | Article |
| Language: | |
| Online Access: | Get full text |
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| Summary: | Ce
3+
and Eu
2+
doped and Ce
3+
-Eu
2+
co-doped Sr
2
MgSi
2
O
7
phosphors are prepared
via
a high-temperature solid-state reaction technique. The synchrotron radiation vacuum ultraviolet-ultraviolet (VUV-UV) excitation and ultraviolet-visible (UV-vis) emission spectra of diluted Ce
3+
and Eu
2+
doped Sr
2
MgSi
2
O
7
samples are measured at cryogenic temperatures. The electron-vibrational interaction (EVI) between Ce
3+
and its surroundings is analyzed. The dependencies of the 4f-5d transitions of Ce
3+
on the structure of the host compounds Sr
2
MgSi
2
O
7
, Ba
2
MgSi
2
O
7
and BaMg
2
Si
2
O
7
are discussed in detail. Then the thermal quenching channel is proposed based on the measurements of temperature dependent luminescence intensities and decay times of Ce
3+
and Eu
2+
in Sr
2
MgSi
2
O
7
, and the Ce
3+
→ Eu
2+
energy transfer mechanism is understood by three luminescence dynamic models. In addition, Sr
2
MgSi
2
O
7
:Ce
3+
/Eu
2+
samples are evaluated for the possibilities of X-ray detection applications using X-ray excited luminescence (XEL) spectroscopy, and it was found that they are not suitable.
The VUV-UV-vis photoluminescence, X-ray radioluminescence, energy transfer dynamics of Ce
3+
and Eu
2+
in Sr
2
MgSi
2
O
7
and the dependencies of Ce
3+
4f-5d transitions on the local structure of Sr
2
MgSi
2
O
7
, Ba
2
MgSi
2
O
7
and BaMg
2
Si
2
O
7
are discussed. |
|---|---|
| ISSN: | 1477-9226 1477-9234 |
| DOI: | 10.1039/d2dt03165e |