Formation and Photophysical Properties of Silver Clusters in Bulk of Photo-Thermo-Refractive Glass

Author:

Mironov Leonid Yu.1ORCID,Marasanov Dmitriy V.1,Sannikova Mariia D.1,Zyryanova Ksenia S.1,Slobozhaninov Artem A.1,Kolesnikov Ilya E.2

Affiliation:

1. Research and Educational Center for Photonics and Optoinformatics, ITMO University, Kronverkskiy Pr. 49, Saint Petersburg 197101, Russia

2. Center for Optical and Laser materials research, St. Petersburg University, 7/9 Universitetskaya Nab, Saint Petersburg 199034, Russia

Abstract

The bright luminescence of silver clusters in glass have potential applications in solid-state lighting, optical memory, and spectral converters. In this work, luminescent silver clusters were formed in the bulk of photo-thermo-refractive glass (15Na2O-5ZnO-2.9Al2O3-70.3SiO2-6.5F, mol.%) doped with different Ag2O concentrations from 0.01 to 0.05 mol.%. The spontaneous formation of plasmonic nanoparticles during glass synthesis was observed at 0.05 mol.% of Ag2O in the glass composition, limiting the silver concentration range for cluster formation. The luminescence of silver clusters was characterized by steady-state and time-resolved spectroscopy techniques. The rate constants of fluorescence, phosphorescence, intersystem crossing, and nonradiative deactivation were estimated on the basis of an experimental study. A comparison of the results obtained for the photophysical properties of luminescent silver clusters formed in the ion-exchanged layers of photo-thermo-refractive glass is provided.

Funder

Russian Science Foundation

Publisher

MDPI AG

Subject

Materials Science (miscellaneous),Ceramics and Composites

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