Luminescence of oxyfluoride glasses co-doped with Ag nanoclusters and Yb3+ ions

V. K. Tikhomirov; T. Vosch; E. Fron; V. D. Rodríguez; J. J. Velázquez; D. Kirilenko; G. Van Tendeloo; J. Hofkens; M. Van der Auweraer; V. V. Moshchalkov

doi:10.1039/C1RA01026C

Luminescence of oxyfluoride glasses co-doped with Ag nanoclusters and Yb³⁺ ions

V. K. Tikhomirov,*^a T. Vosch,^b E. Fron,^c V. D. Rodríguez,^d J. J. Velázquez,^d D. Kirilenko,^e G. Van Tendeloo,^e J. Hofkens,^c M. Van der Auweraer^c and V. V. Moshchalkov^a

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* Corresponding authors

^a INPAC-Institute for Nanoscale Physics and Chemistry, Katholieke Universiteit Leuven, Belgium
E-mail: Victor.Tikhomirov@fys.kuleuven.be

^b Nano-Science Center, Department of Chemistry, University of Copenhagen, Universitetsparken, Copenhagen, Denmark

^c Department of Chemistry, Katholieke Universiteit Leuven, Belgium

^d Departamento de Física Fundamental y Experimental, Electrónica y Sistemas, Universidad de La Laguna, Tenerife, Spain

^e EMAT, Electron Microscopy for Materials Science, Antwerpen Universiteit, Belgium

Abstract

Bulk oxyfluoride glasses co-doped with Ag nanoclusters and Yb³⁺ ions have been prepared by a melt quenching technique. When excited in the absorption band of the Ag nanoclusters between 300 to 500 nm, these glasses emit a broad band characteristic of the Ag nanoclusters between 400 to 750 nm as well as an emission band between 900 to 1100 nm, originating from Yb³⁺ ions. The intensity ratio of the Yb³⁺/Ag emission bands increases with the Ag doping level at a fixed concentration of Yb³⁺, indicating the presence of energy transfer mechanism from the Ag nanoclusters to the Yb³⁺ ions. Comparison of time-resolved decay kinetics of the luminescence in the respectively Ag nanocluster-Yb³⁺ co-doped and single Ag nanocluster doped glasses, hints towards an energy transfer from the red and infrared emitting Ag nanoclusters to the Yb³⁺ ions.

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Luminescence of oxyfluoride glasses co-doped with Ag nanoclusters and Yb³⁺ ions

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Luminescence of oxyfluoride glasses co-doped with Ag nanoclusters and Yb³⁺ ions

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