| Abstract: | This article has been retracted at the request of the Editors, after a reader brought the following to their attention.Reason: The article substantially reproduces parts of articles published by the same authors in the Journal of Luminescence (“Effect of F− ions on physical and spectroscopic properties of Yb3+-doped TeO2 glasses”, Volume 113, Issues 1-2, Pages 27-32) and the Journal of Alloys and Compounds (“Fluorescence lifetime increase by introduction of F− ions in ytterbium-doped TeO2-based glasses”, Volume 393, Issues 1-2, Pages 279-282). There was also a failure to cite either of these articles. These other articles have also been retracted.This action has been agreed by the Editors of the three journals. |
