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Structural and spectral characterisation of Er3+ and Nd3+ doped Ga-La-S-Se glasses

Structural and spectral characterisation of Er3+ and Nd3+ doped Ga-La-S-Se glasses
Structural and spectral characterisation of Er3+ and Nd3+ doped Ga-La-S-Se glasses
In this work, the spectroscopy of Er3+ and Nd3+ 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 Nd3+ doped samples, whilst co-operative upconversion, radiation trapping and concentration quenching were observed in Er3+ 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.
2046-2069
27556-27564
Ravagli, A.
36bc59df-8134-42d1-9871-bcf7bab6539a
Boetti, N.G.
fc2534c7-0951-4731-9274-73d4cab64dee
Guzman Cruz, F.A.
19e24c46-ae30-465b-9d53-853ebf207b2e
Alzaidy, G.A.
2d39b828-3eb4-4d96-85e6-d436a2b71435
Pugliese, D.
8b64aacb-c498-4a44-8772-608300e5039f
Milanese, D.
ecb96980-ac53-454f-b513-cc5e6470fe24
Hewak, D.W.
87c80070-c101-4f7a-914f-4cc3131e3db0
Ravagli, A.
36bc59df-8134-42d1-9871-bcf7bab6539a
Boetti, N.G.
fc2534c7-0951-4731-9274-73d4cab64dee
Guzman Cruz, F.A.
19e24c46-ae30-465b-9d53-853ebf207b2e
Alzaidy, G.A.
2d39b828-3eb4-4d96-85e6-d436a2b71435
Pugliese, D.
8b64aacb-c498-4a44-8772-608300e5039f
Milanese, D.
ecb96980-ac53-454f-b513-cc5e6470fe24
Hewak, D.W.
87c80070-c101-4f7a-914f-4cc3131e3db0

Ravagli, A., Boetti, N.G., Guzman Cruz, F.A., Alzaidy, G.A., Pugliese, D., Milanese, D. and Hewak, D.W. (2018) Structural and spectral characterisation of Er3+ and Nd3+ doped Ga-La-S-Se glasses. RSC Advances, 8 (48), 27556-27564. (doi:10.1039/c8ra04795b).

Record type: Article

Abstract

In this work, the spectroscopy of Er3+ and Nd3+ 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 Nd3+ doped samples, whilst co-operative upconversion, radiation trapping and concentration quenching were observed in Er3+ 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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Accepted/In Press date: 23 July 2018
e-pub ahead of print date: 2 August 2018

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Local EPrints ID: 422948
URI: http://eprints.soton.ac.uk/id/eprint/422948
ISSN: 2046-2069
PURE UUID: 2138951b-4d1a-4b55-a024-ada90c9293d7
ORCID for F.A. Guzman Cruz: ORCID iD orcid.org/0000-0002-8096-3805
ORCID for D.W. Hewak: ORCID iD orcid.org/0000-0002-2093-5773

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Date deposited: 08 Aug 2018 16:30
Last modified: 07 Oct 2020 01:37

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Contributors

Author: A. Ravagli
Author: N.G. Boetti
Author: F.A. Guzman Cruz ORCID iD
Author: G.A. Alzaidy
Author: D. Pugliese
Author: D. Milanese
Author: D.W. Hewak ORCID iD

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