Spectral and temperature characteristics of Cs2Na(Er,Yb, Y)Cl6 upconverters |
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Authors: | Z Mazurak E Łukowiak B Jeźowska-Trzebiatowska |
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Institution: | Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O. Box 937, 50-950 Wroc?aw, Poland |
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Abstract: | Spectral luminescence characteristics of the Cs2Na(Er, Yb, Y)Cl6 type upconverter have been measured in the range 300–650 K. A nearly sixfold decrease of the emission intensity of an upconverter was observed in the green area. This emission corresponds to two luminescence transition of Er3+ ions: and . A mechanism of the luminescence intensity decrease has been proposed, in which deexcitation of the level to the level is caused by a neighbouring Er3+ ion being excited to the level. |
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