Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7899539 | Journal of Non-Crystalline Solids | 2018 | 11 Pages |
Abstract
Glasses with composition (59.5-x)P2O5-20.0MgO-20.0ZnSO4-0.5Dy2O3-xAgCl (0.0â¤x⤠0.5â¯mol%) were prepared by melt-quenching method and characterized thoroughly. The role of silver nanoparticles (Ag NPs) inclusion on the spectroscopic and the physical properties of the synthesized glasses were determined. Judd-Ofelt (J-O) theory was used to complement the experimental optical data. TEM images confirmed the existence of Ag NPs of average size â4.5â¯nm. The absorption spectra showed eleven bands aroused from the ground state (6I15/2) to various excited states transitions of dysprosium (Dy3+) ion. The surface plasmon resonance (SPR) peak of Ag NPs was probed around 446â¯nm. The calculated J-O parameter (Ω2) for the glass without Ag NPs incorporation was the highest, indicating the strong metal-ligand covalence bond. Irrespective of Ag NPs contents, the emission spectra of the studied glasses revealed two intense photoluminescence bands centered at 480â¯nm (blue: 4F9/2â6H15/2) and 574â¯nm (yellow: 4F9/2â6H13/2) accompanied by two very weak red bands positioned at 662 and 752â¯nm. The luminescence intensity of both blue and yellow band was enhanced by a factor of 2 and it was 1.5 fold for the red bands. This enrichment in the luminescence intensity was attributed to the Ag NPs mediated SPR effect and subsequent energy transfer from the Ag NPs to the nearsighted Dy3+ ions.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
F. Ahmadi, R. Hussin, S.K. Ghoshal,