White upconversion luminescence in CaF sub(2):Yb super(3+)/Eu super(3+) powders viathe incorporation of Y super(3+) ions

White upconversion luminescence (UCL) was achieved under 980 nm excitation in the CaF sub(2):Yb super(3+)/Eu super(3+) material using Y super(3+) to adjust the luminescence performance. In this luminescent system, Yb super(3+) not only plays the role of a sensitizer of Eu super(3+), but also generat...

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Published inPhysical chemistry chemical physics : PCCP Vol. 18; no. 24; pp. 16094 - 16097
Main Authors Li, Yangyang, Guo, Junjie, Liu, Xiaohui, Aidilibike, Tuerxun, Qin, Weiping
Format Journal Article
LanguageEnglish
Published 01.06.2016
Subjects
Adjustment
Calcium fluoride
Dimers
Emission
Fluorescence
Luminescence
Physical chemistry
Upconversion
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Summary:White upconversion luminescence (UCL) was achieved under 980 nm excitation in the CaF sub(2):Yb super(3+)/Eu super(3+) material using Y super(3+) to adjust the luminescence performance. In this luminescent system, Yb super(3+) not only plays the role of a sensitizer of Eu super(3+), but also generates green fluorescence from Yb super(3+) dimers (2-Yb super(3+)) by cooperative transitions in the CaF sub(2) matrix. One of the primary colors of green corresponds to the 2-Yb super(3+) cooperative emission exactly. Eu super(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 super(3+) ions, and white UCL was realized when the concentration of Y super(3+) was 1%.
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ISSN:1463-9076
1463-9084
DOI:10.1039/c6cp02849g