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Structural and spectral characterisation of Er 3+ and Nd 3+ doped Ga-La-S-Se glasses
In this work, the spectroscopy of Er and Nd doped Se-GLS glasses was studied. A structural comparison between doped and non-doped samples was done to assess the differences between the glasses. For this comparison, Raman spectroscopy and thermal analysis were employed. The spectral properties of the...
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Published in: | RSC advances 2018-07, Vol.8 (48), p.27556-27564 |
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Main Authors: | , , , , , , |
Format: | Article |
Language: | English |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | In this work, the spectroscopy of Er
and Nd
doped Se-GLS glasses was studied. A structural comparison between doped and non-doped samples was done to assess the differences between the glasses. For this comparison, Raman spectroscopy and thermal analysis were employed. The spectral properties of the samples were studied in order to identify the mechanisms responsible for quenching the fluorescence lifetime of the dopants. In particular, cross-relaxation and concentration quenching were observed in Nd
doped samples, whilst co-operative upconversion, radiation trapping and concentration quenching were observed in Er
doped samples. The results obtained demonstrated the fundamental role of the phonon energy in the mechanism of fluorescence. The low phonon energy of chalcogenides decreased the rate of non-radiative processes promoting co-operative upconversion. This effect could be exploited to design new lasers and sensitizers for solar energy harvesters. |
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ISSN: | 2046-2069 2046-2069 |
DOI: | 10.1039/C8RA04795B |