Issue 48, 2018, Issue in Progress

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

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.

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

Article information

Article type
Paper
Submitted
05 Jun 2018
Accepted
23 Jul 2018
First published
02 Aug 2018
This article is Open Access
Creative Commons BY license

RSC Adv., 2018,8, 27556-27564

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

A. Ravagli, N. G. Boetti, F. A. Guzman Cruz, G. A. Alzaidy, D. Pugliese, D. Milanese and D. W. Hewak, RSC Adv., 2018, 8, 27556 DOI: 10.1039/C8RA04795B

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