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Band gap engineering and modifying surface of TiO2 nanostructures by Fe2O3 for enhanced-performance of dye sensitized solar cell

Kilic, Bayram; Gedik, Nebi; Mucur, Selin Piravadilh; Hergul, Ahmet Serhan; Gur, Emre


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        "affiliation": "Yalova Univ, Fac Engn, Dept Energy Syst Engn, TR-77100 Yalova, Turkey", 
        "name": "Kilic, Bayram"
      }, 
      {
        "affiliation": "Karadeniz Tech Univ, Fac Marine Sci, Dept Maritime Business Adm Engn, TR-61080 Trabzon, Turkey", 
        "name": "Gedik, Nebi"
      }, 
      {
        "affiliation": "Gebze Inst Technol, Fac Sci, Dept Phys, TR-411400 Gebze, Turkey", 
        "name": "Mucur, Selin Piravadilh"
      }, 
      {
        "affiliation": "Yalova Univ, Fac Engn, Dept Energy Syst Engn, TR-77100 Yalova, Turkey", 
        "name": "Hergul, Ahmet Serhan"
      }, 
      {
        "affiliation": "Ataturk Univ, Fac Sci, Dept Phys, TR-25240 Erzurum, Turkey", 
        "name": "Gur, Emre"
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    "description": "Well-crystallized Fe2O3-modified TiO2 nanoparticles are prepared by a hydrothermal method and were successfully used as the photoanode of dye-sensitized solar cell (DSSC). Structural, optical and thermal characterizations were carried out by SEM, XRD, AFM, EDAX, DTG, TG and UV-vis spectroscopy. We show that the solar conversion efficiency, incident photocurrent efficiency (IPCE) and fill factor (FF) of Fe2O3-modified TiO2 are significantly increased, about 40%, compared those of to bare TiO2. DSSC shows power conversion efficiency of 7.27% based on Fe2O3-modified TiO2 while TiO2 anatase shows 5.10% solar conversion efficiency. The high improvement in cell performance is attributed to the enhanced light harvesting and high specific surface area for adsorbing more dye molecules in Fe2O3-modified TiO2 nanostructures. (C) 2014 Elsevier Ltd. All rights reserved.", 
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