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Upconversion properties and dynamics study in Tm3+ and Yb3+ codoped CaSc2O4 oxide material
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10.1063/1.4810898
/content/aip/journal/jap/113/22/10.1063/1.4810898
http://aip.metastore.ingenta.com/content/aip/journal/jap/113/22/10.1063/1.4810898
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

XRD patterns for phosphors with the nominal compositions of CaScO:0.2%Tm, xYb (x = 5%, 10%, 20%, 30%).

Image of FIG. 2.
FIG. 2.

UCL spectrum of CaScO:0.4%Tm, 10%Yb under 980 nm excitation with a low pump density of 7 mW/mm.

Image of FIG. 3.
FIG. 3.

Infrared spectra for CaScO:0.2%Tm, xYb (x = 1%, 5%, 10%, 15%, 20%, 25%, 30%) under 980 nm excitation. Spectra are normalized to the maximum intensity of Yb emission.

Image of FIG. 4.
FIG. 4.

Evolution of intensity ratio as a function of Yb concentration.

Image of FIG. 5.
FIG. 5.

Infrared spectra for CaScO:yTm, 10%Yb (y = 0.1%, 0.2%, 0.4%, 0.6%, 1%, 1.4%, 2%) under 980 nm excitation.

Image of FIG. 6.
FIG. 6.

Evolution of intensity ratio as a function of Tm concentration.

Image of FIG. 7.
FIG. 7.

Dependence of the blue (GH) and near-infrared (HH) UCL intensity on the concentration of Yb (a) and Tm (b) ions in CaScO material.

Image of FIG. 8.
FIG. 8.

Evolutions of intensity ratio as a function of Yb (a) and Tm (b) concentration.

Image of FIG. 9.
FIG. 9.

Pump power dependences of emission intensities in CaScO: 0.4%Tm, 10%Yb under a 980 nm excitation.

Image of FIG. 10.
FIG. 10.

Energy level diagrams and dominant upconversion mechanisms in CaScO:Tm, Yb following 980 nm excitation.

Image of FIG. 11.
FIG. 11.

Decay curves of Yb:FF in CaScO:yTm, 10%Yb (y = 0%, 0.1%, 0.4%, 1%, 2%). Inset presents the calculated lifetime and energy transfer efficiency ( ) of sample with different Tm concentration.

Image of FIG. 12.
FIG. 12.

Dependence of Tm:H and G intrinsic lifetimes on Yb concentration in CaScO:0.2%Tm, xYb (x = 0%, 1%, 5%, 10%, 15%, 20%).

Image of FIG. 13.
FIG. 13.

Emission spectrum from 600 nm to 1700 nm of CaScO:0.2%Tm, 10%Yb sample excited Tm:G level at 466 nm.

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/content/aip/journal/jap/113/22/10.1063/1.4810898
2013-06-12
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Upconversion properties and dynamics study in Tm3+ and Yb3+ codoped CaSc2O4 oxide material
http://aip.metastore.ingenta.com/content/aip/journal/jap/113/22/10.1063/1.4810898
10.1063/1.4810898
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