From the infrared to the visible range: Spectroscopic studies of ytterbium doped oxyborates |
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Authors: | V. Jubera J. Sablayrolles R. Decourt A. Garcia |
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Affiliation: | a ICMCB-CNRS, Université Bordeaux 1, 87 Avenue Dr. A. Schweitzer, 33608 Pessac Cedex, France b Groupe de Spectroscopie Moléculaire (GSM), Institut des Sciences Moléculaires (ISM), UMR 5255 CNRS-Université Bordeaux 1, 33405 Talence Cedex, France |
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Abstract: | The spectroscopic study of yttrium oxyborates doped with trivalent ytterbium is conducted in the UV-Visible and infrared range. The multiplicity of the ytterbium environments in the studied compounds leads to complex emission spectra in the infrared and excitation spectra in the ultraviolet. Different 2F5/2 and 2F7/2 transitions have been pointed out. The emission extends up to 1090 nm for one compound. A correlation was evidenced between position and de-excitation mode of a charge transfer band and ytterbium environment for both oxyborates. Decay time dependence as a function of ytterbium concentration is also reported. For the highest concentration, a blue-green luminescence can be observed under strong IR excitation. Its study revealed two possible mechanisms: erbium ion emission at 550 nm after up-conversion and cooperative luminescence of ytterbium ions. |
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Keywords: | Ytterbium Oxyborate Luminescence Cooperative luminescence |
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