Authors: José A Jiménez
Publish Date: 2016/12/09
Volume: 27, Issue: 1, Pages: 372-379
Abstract
The optical properties of Eu3+doped aluminophosphate glass containing a high concentration of Ag2O and SnO codopants 8 mol of each are reported Glass preparation is carried out by meltquenching and a subsequent in situ monitored heat treatment HT is carried out for the reduction of ionic silver to Ag nanoparticles NPs via reducing agent tinII An enhanced ultraviolet broadband excitation range for Eu3+ ions is realized for the meltquenched glass likely due to the creation of moleculelike silver species such as Ag+–Ag+ dimers The realtime optical monitoring of the glass during isothermal HT shows the steady development of the surface plasmon resonance peak of Ag NPs near 420 nm Concurrently exciting Eu3+ ions in situ at 420 nm unveils the plasmonic diluent effect manifested through the quenching of Eu3+ luminescence The decay times of the 5D0 emitting state in Eu3+ ions in the meltquenched and NPdoped glasses are measured and discussed
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