Effects of temperature on the time responses of strontium aluminates

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Titre:	Effects of temperature on the time responses of strontium aluminates
Auteur(s):	Fouzar, Samia Eftimov, Tinko Kostova, Irena Benmounah, Abdelbaki Lakhssassi, Ahmed
Mots-clés:	Rise and decay time responses Phosphorescence Strontium aluminates Temperature dependence
Date de publication:	2021
Editeur:	Elsevier
Collection/Numéro:	Optical Materials/ Vol.122 (2021);
Résumé:	In this paper we study the effect of temperature on the rise and decay time responses of Eu and Eu, Dy doped strontium aluminates. Normalized switch on and switch off time responses are used to estimate the share of phosphorescence in the observed luminescence. The parameters of the power law time responses related to the relative share of phosphorescence in luminescence and to the rise/decay rates are found to be strongly temperature dependent. The results show that unlike luminescence intensity, the overall efficiency of phosphorescence increases strongly with temperature and reaches a maximum around 65 °C. Thе maximum correlates with the activation energy of the samples and depends on their doping and fabrication technology
URI/URL:	https://doi.org/10.1016/j.optmat.2021.111619 https://www.sciencedirect.com/science/article/abs/pii/S0925346721008193 http://dlibrary.univ-boumerdes.dz:8080/handle/123456789/7420
ISSN:	09253467
Collection(s) :	Publications Internationales

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