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Upconversion and anomalous power dependence in single phase nanophosphor
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10.1063/1.3148294
/content/aip/journal/jap/105/12/10.1063/1.3148294
http://aip.metastore.ingenta.com/content/aip/journal/jap/105/12/10.1063/1.3148294
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

XRD patterns of as-synthesized and calcinated samples at 1273 and 1473 K temperatures.

Image of FIG. 2.
FIG. 2.

TEM photograph of the as-synthesized sample.

Image of FIG. 3.
FIG. 3.

Comparison between the FTIR spectra of as-synthesized sample and sample calcinated at 1473 K for 4 h.

Image of FIG. 4.
FIG. 4.

Upconversion spectra of , sample in the 300–500 nm range with 976 nm excitation. (a) As-synthesized. (b) Calcinated at 1073 K for 2 h. (c) Calcinated at 1273 K for 2 h; (d) Calcinated at 1473 K for 2 h. (e) Calcinated at 1473 K for 4 h.

Image of FIG. 5.
FIG. 5.

Upconversion spectra of , sample in the 500–900 nm range with 976 nm excitation. (a) As-synthesized. (b) Calcinated at 1073 K for 2 h. (c) Calcinated at 1273 K for 2 h. (d) Calcinated at 1473 K for 2 h. (e) Calcinated at 1473 K for 4 h.

Image of FIG. 6.
FIG. 6.

ln-ln plots for blue upconversion emission bands in , sample.

Image of FIG. 7.
FIG. 7.

ln-ln plots for green and red upconversion emission bands in , sample.

Image of FIG. 8.
FIG. 8.

Schematic representation of upconversion emission through ESA and ET processes among the three levels and population dependence of level with ESA and ET.

Image of FIG. 9.
FIG. 9.

Emission spectrum of ions with 266 nm excitation. (a) As-synthesized. (b) Calcinated at 1073 K for 2 h. (c) Calcinated at 1273 K for 2 h. (d) Calcinated at 1473 K for 4 h.

Image of FIG. 10.
FIG. 10.

Absorption spectra of samples (a) undoped, (b) as-synthesized, (b) calcinated at 1073 K, and (d) calcinated at 1473 K.

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/content/aip/journal/jap/105/12/10.1063/1.3148294
2009-06-16
2014-04-25
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Upconversion and anomalous power dependence in Ca12Al14O33:Er3+/Yb3+ single phase nanophosphor
http://aip.metastore.ingenta.com/content/aip/journal/jap/105/12/10.1063/1.3148294
10.1063/1.3148294
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