Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7839627 | Journal of Luminescence | 2018 | 29 Pages |
Abstract
Effects of silver (Ag) nanoparticles (NPs) on the physical and optical properties of erbium ions (Er3+) doped magnesium zinc sulfophosphate glasses of composition (59.5-x)P2O5-20.0MgO-20.0ZnSO4-0.5Er2O3-xAgCl (where xâ¯â¤â¯1.5â¯mol%) were examined. Transparent bubble free glasses were prepared using melt quenching method. As-quenched samples were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR), ultraviolet-visible (UV-Vis) absorption and photoluminescence (PL) spectroscopy to determine the feasibility of achieving their improved optical properties useful for photonic devices. Furthermore, Judd-Ofelt intensity and radiative parameters were evaluated to complement the experimental observations. XRD patterns of as-quenched samples confirmed their amorphous nature. TEM images of glasses revealed the nucleation of Ag NPs with average size of 10â¯nm. UV-Vis spectra of glasses exhibited nine absorption bands assigned to 4f-4f transitions of Er3+ ions. An enhancement in the PL emission intensities corresponding to the 2H11/2â4I15/2 and 4S3/2â4I15/2 transitions by a factor of 6 and 5 were achieved. Such enhancement was attributed to the local field effect (LFE) stimulated by the surface plasmon resonance (SPR) of Ag NPs alongside energy transfer mechanism among Er3+ ions and Ag NPs.
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Authors
F. Ahmadi, R. Hussin, S.K. Ghoshal,