Effect of CdS nanocrystals on the photoluminescence of Eu3+-doped silicophosphate sol gel glass

Authors :: N. Gaumer
Stéphane Chaussedent
Mohamed Haouari
Z. Zaaboub
H. Ben Ouada
F. Ben Slimen
N. Bel Haj Mohamed
Laboratoire de Photonique d'Angers (LPHIA)
Université d'Angers (UA)
Laboratoire de Micro-optoélectronique et Nanostructures [Monastir]
Faculté des Sciences de Monastir (FSM)
Université de Monastir - University of Monastir (UM)-Université de Monastir - University of Monastir (UM)
Laboratoire des Interfaces et Matériaux Avancés [Monastir] (LIMA)
Source :: RSC Advances, RSC Advances, Royal Society of Chemistry, 2017, 7 (24), pp.14552-14561. ⟨10.1039/c7ra01313b⟩
Publication Year :: 2017
Publisher :: Royal Society of Chemistry (RSC), 2017.
Abstract: International audience; In this work, we investigate the effect of co-doping with CdS nanoparticles on the photoluminescence properties of Eu3+ doped silicophosphate glass prepared via the sol gel method. Infrared spectroscopy (FTIR) revealed the insertion of phosphorus within the silicate network. XRD and TEM analyses revealed the presence of CdS nanoparticles dispersed in the glass matrix. Based on the optical study and the effective mass theory for spherical quantum dots, it was found that CdS nanocrystals have a gap of nearly 3.53 eV and a size of 2.42 nm. The enhancement of Eu3+ emission induced by CdS nanocrystals and thermal annealing was assigned to either an energy transfer via defect states or structural alteration of the glass network around the rare earth ions.

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