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Impact of preparation method of TiO2-RGO nanocomposite photoanodes on the performance of dye-sensitized solar cells

Nouri, E ; Sharif University of Technology | 2016

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  1. Type of Document: Article
  2. DOI: 10.1016/j.electacta.2016.09.150
  3. Publisher: Elsevier Ltd , 2016
  4. Abstract:
  5. In this work, a comparative study has been performed on two ex-situ and one in-situ doping of titania photoanodes with reduced graphene oxide. The presence of finely dispersed reduced graphene oxide facilitates electron transport and reduces electron-hole recombination resulting in a better performance of doped titania photoanodes. It was found that in-situ doping, i.e. introduction of graphene oxide in solution together with titania precursor was the most performant case of graphene doping. This result was obvious by studying dye-sensitized solar cells based on such doped photoanodes but was also and mainly analytically demonstrated by subjecting the obtained materials to characterization by several techniques, including thermal and N2 adsorption-desorption analysis, SEM and TEM microscopy and XRD, XPS, Raman, UV–vis, Photoluminescence and Electrochemical Impedance Spectroscopy
  6. Keywords:
  7. Ex-situ and in-situ methods ; Titania-graphene nanocomposites ; Electrochemical impedance spectroscopy ; Electron transport properties ; Graphene ; Nanocomposites ; Nanostructured materials ; Semiconductor doping ; Solar cells ; Titanium dioxide ; Adsorption desorption ; Comparative studies ; Electron transport ; Electron-hole recombination ; Graphene nanocomposites ; In-situ methods ; Preparation method ; Reduced graphene oxides ; Dye-sensitized solar cells
  8. Source: Electrochimica Acta ; Volume 219 , 2016 , Pages 38-48 ; 00134686 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S0013468616320813?via%3Dihub