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Journal of Nanomaterials
Volume 2017, Article ID 9701251, 13 pages
Research Article

Enhancement of Fluorescence and Photostability Based on Interaction of Fluorescent Dyes with Silver Nanoparticles for Luminescent Solar Concentrators

1Physics Department, Faculty of Science, Zagazig University, Zagazig, Egypt
2Institute for Nanoelectronics, Technical University of Munich, 80333 Munich, Germany
3Basic Sciences, College of Engineering, University of Business and Technology (UBT), Jeddah, Saudi Arabia

Correspondence should be addressed to Sara El-Molla; ed.mut@allom-le.aras

Received 27 June 2017; Revised 15 August 2017; Accepted 6 September 2017; Published 15 October 2017

Academic Editor: Giuseppe Compagnini

Copyright © 2017 Sara El-Molla et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


For luminescent solar concentrators (LSCs), it is important to enhance the fluorescence quantum yield (FQY) and photostability. Our measurements have demonstrated that the addition of silver nanoparticles to dye solution causes broadening of absorption bands, so the spectral range of sunlight absorbed by LSC has increased. Silver nanoparticles (NPs) were characterized by X-ray diffraction (XRD) and UV-Vis absorption spectra. UV-Vis spectrum showed a single peak at 442 nm due to the surface plasmon resonance (SPR). The position of SPR peak exhibited a red shift after the sample was exposed to UV irradiation (unfiltered light). The optical band gap values have a reduction from 2.46 to 2.37 eV after irradiation for 960 minutes. Such reduction in optical band gap may be due to change in particle size calculated using Mie theory. The photostability of organic dyes used was improved after adding silver nanoparticles. The area under fluorescence spectra of dyes with silver NPs increased by 41–31% when compared with identical dye concentrations without silver nanoparticles as a result of interaction of the species with silver NPs.