White upconversion luminescence in CaF2:Yb3+/Eu3+ powders via the incorporation of Y3+ ionsElectronic supplementary information (ESI) available. See DOI: 10.1039/c6cp02849g
White upconversion luminescence (UCL) was achieved under 980 nm excitation in the CaF 2 :Yb 3+ /Eu 3+ material using Y 3+ to adjust the luminescence performance. In this luminescent system, Yb 3+ not only plays the role of a sensitizer of Eu 3+ , but also generates green fluorescence from Yb 3+ dime...
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| Main Authors | , , , , |
|---|---|
| Format | Journal Article |
| Published |
15.06.2016
|
| Online Access | Get full text |
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| Summary: | White upconversion luminescence (UCL) was achieved under 980 nm excitation in the CaF
2
:Yb
3+
/Eu
3+
material using Y
3+
to adjust the luminescence performance. In this luminescent system, Yb
3+
not only plays the role of a sensitizer of Eu
3+
, but also generates green fluorescence from Yb
3+
dimers (2-Yb
3+
) by cooperative transitions in the CaF
2
matrix. One of the primary colors of green corresponds to the 2-Yb
3+
cooperative emission exactly. Eu
3+
acts as an activator for emitting red and blue fluorescence simultaneously. Interestingly, the color of the UCL can be controlled by adjusting the doping concentration of Y
3+
ions, and white UCL was realized when the concentration of Y
3+
was 1%.
Upconversion emission spectra of different concentrations of Y
3+
co-doped CaF
2
:Yb
3+
/Eu
3+
powders. Illustrations represent the series of luminescence photos of the samples. |
|---|---|
| Bibliography: | 10.1039/c6cp02849g Electronic supplementary information (ESI) available. See DOI |
| ISSN: | 1463-9076 1463-9084 |
| DOI: | 10.1039/c6cp02849g |