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      Boosting Photovoltaic Performance of Dye-Sensitized Solar Cells Using Silver Nanoparticle-Decorated N,S-Co-Doped-TiO 2 Photoanode

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          Abstract

          A silver nanoparticle-decorated N,S-co-doped TiO 2 nanocomposite was successfully prepared and used as an efficient photoanode in high-performance dye-sensitized solar cells (DSSCs) with N719 dye. The DSSCs assembled with the N,S-TiO 2@Ag-modified photoanode demonstrated an enhanced solar-to-electrical energy conversion efficiency of 8.22%, which was better than that of a DSSC photoanode composed of unmodified TiO 2 (2.57%) under full sunlight illumination (100 mWcm −2, AM 1.5 G). This enhanced efficiency was mainly attributed to the reduced band gap energy, improved interfacial charge transfer, and retarded charge recombination process. The influence of the Ag content on the overall efficiency was also investigated, and the optimum Ag content with N,S-TiO 2 was found to be 20 wt%. Because of the enhanced solar energy conversion efficiency of the N,S-TiO 2@Ag nanocomposite, it should be considered as a potential photoanode for high-performance DSSCs.

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          Efficient visible-light-induced photocatalytic disinfection on sulfur-doped nanocrystalline titania.

          B. H. Yip, J. Zhao, CHUN-SHU YU … (2005)
          Sulfur-doped titanium dioxide exhibits a strong visible-light-induced antibacterial effect. The new photocatalyst can effectively kill Micrococcus lylae, a common Gram-positive bacterium. The relationship between sulfur concentration and the bactericidal activity of S-doped TiO2 was investigated. Results from DMPO spin-trapping electron spin resonance measurements confirm the formation of hydroxyl radicals, which is the origin of the considerable bactericidal activity under visible light irradiation.
          Article 0 comments Cited 124 times – based on 0 reviews     Review now
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            Controlled synthesis of Ag/TiO2 core-shell nanowires with smooth and bristled surfaces via a one-step solution route.

            Jimin Du, Jianling Zhang, Zhimin Liu … (2006)
            Ag/TiO2 core-shell nanowires were synthesized via a one-step solution method without using a template. Interestingly, the shell morphologies can be controlled to be smooth or bristled by altering the reaction temperature. Moreover, the TiO2 shell thickness and bristle length can be tuned by changing the AgNO3 concentration. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), selected-area electron diffraction (SAED), energy-dispersive X-ray analysis (EDS), X-ray powder diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) were used to characterize the resultant Ag/TiO2 core-shell nanowires. Moreover, the absorption peaks of our samples are significantly red-shifted compared with those of the uncoated pure silver nanowires, indicating that interaction between the core and shell occurred. On the basis of the experimental results, we proposed a template-induced Oswald ripening mechanism to explain the formation of the Ag/TiO2 core-shell nanowires.
            Article 0 comments Cited 31 times – based on 0 reviews     Review now
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              Recombination and transport processes in dye-sensitized solar cells investigated under working conditions.

              Jarl Nissfolk, Kristofer Fredin, Anders Hagfeldt … (2006)
              The transport and recombination of electrons in dye-sensitized TiO(2) solar cells were studied by analysis of the current and voltage response to a small square-wave light-intensity modulation. Solar cells were studied under working conditions by using potentiostatic and galvanostatic conditions. An increase in applied voltage, that is, from 0 V toward open-circuit voltage, was found to lead to faster electron transport at low light intensities, while it slowed transport at higher light intensities. This observation seems to be conflicting with the multiple trapping model with diffusive transport. An effective diffusion length at the maximum power point was calculated, and it was shown that it decreases with increasing light intensity.
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                Author and article information

                Journal
                Journal ID (nlm-ta): Sci Rep
                Journal ID (iso-abbrev): Sci Rep
                Title: Scientific Reports
                Publisher: Nature Publishing Group
                ISSN (Electronic): 2045-2322
                Publication date (Electronic): 06 July 2015
                Publication date Collection: 2015
                Volume: 5
                Electronic Location Identifier: 11922
                Affiliations
                [1 ]Low Dimensional Materials Research Centre, Department of Physics, Faculty of Science, University of Malaya , 50603 Kuala Lumpur, Malaysia
                [2 ]Department of Chemistry, Faculty of Science, Universiti Putra Malaysia , 43400 UPM Serdang, Selangor, Malaysia
                [3 ]Functional Device Laboratory, Institute of Advanced Technology, Universiti Putra Malaysia , 43400 UPM Serdang, Selangor, Malaysia
                [4 ]Department of Physical Chemistry, School of Chemistry, Centre for Photoelectrochemistry Madurai Kamaraj University , Madurai-625 021, India
                Author notes
                Article
                Publisher Item ID: srep11922
                DOI: 10.1038/srep11922
                PMC ID: 4491728
                PubMed ID: 26146362
                SO-VID: 446aab64-353c-46be-bde3-9ebbf6752c80
                Copyright © Copyright © 2015, Macmillan Publishers Limited
                License:

                This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

                History
                Date received : 14 November 2014
                Date accepted : 29 April 2015
                Categories
                Subject: Article

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